{"id":7514,"date":"2022-12-04T23:24:30","date_gmt":"2022-12-04T14:24:30","guid":{"rendered":"https:\/\/kininariantenna.com\/?p=7514"},"modified":"2022-12-05T22:37:08","modified_gmt":"2022-12-05T13:37:08","slug":"react-hooks%e3%81%aeuseeffect%e3%81%ae%e4%bd%bf%e3%81%84%e6%96%b9%ef%bc%81%e7%ac%ac2%e5%bc%95%e6%95%b0%e3%82%82%e3%81%be%e3%81%a8%e3%82%81%ef%bc%81","status":"publish","type":"post","link":"https:\/\/kininariantenna.com\/?p=7514","title":{"rendered":"React Hooks\u306euseEffect\u306e\u4f7f\u3044\u65b9\uff01\u7b2c2\u5f15\u6570\u306e\u65b9\u6cd5\u3082\u307e\u3068\u3081\uff01"},"content":{"rendered":"<p>\u3051\u3069\u3001\u305d\u3093\u306a\u4e2d\u3067\u60a9\u3080\u3053\u3068\u306f\u3001<\/p>\n<div class=\"kininarukoto1\">\u30fbReact Hooks\u306euseEffect\u306e\u4f7f\u3044\u65b9\u304c\u308f\u304b\u3089\u306a\u3044<br \/>\n\u30fbReact Hooks\u306euseEffect\u306e\u7b2c2\u5f15\u6570\u3067\u5236\u5fa1\u3059\u308b\u65b9\u6cd5\u304c\u308f\u304b\u3089\u306a\u3089\u3044<\/div>\n<p>\u3067\u3059\u3088\u306d\u3002<\/p>\n<p>\u4eca\u56de\u306f\u305d\u3093\u306a\u304a\u60a9\u307f\u3092\u89e3\u6c7a\u3059\u308b<\/p>\n<div class=\"rdinfo\">\u30fbReact Hooks\u306euseEffect\u306e\u4f7f\u3044\u65b9<br \/>\n\u30fbReact Hooks\u306euseEffect\u306e\u7b2c2\u5f15\u6570\u3067\u5236\u5fa1\u3059\u308b\u65b9\u6cd5<\/div>\n<p>\u306b\u3064\u3044\u3066\u307e\u3068\u3081\u307e\u3059\uff01<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_46 counter-hierarchy ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\">\u3082\u304f\u3058<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/kininariantenna.com\/?p=7514\/#React_Hooks%E3%81%AEuseEffect%E3%81%AE%E3%81%A8%E3%81%AF\" title=\"React Hooks\u306euseEffect\u306e\u3068\u306f\">React Hooks\u306euseEffect\u306e\u3068\u306f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/kininariantenna.com\/?p=7514\/#React_Hooks%E3%81%AEuseEffect%E3%81%AE%E4%BD%BF%E3%81%84%E6%96%B9\" title=\"React Hooks\u306euseEffect\u306e\u4f7f\u3044\u65b9\">React Hooks\u306euseEffect\u306e\u4f7f\u3044\u65b9<\/a><ul class='ez-toc-list-level-3'><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/kininariantenna.com\/?p=7514\/#React_Hooks%E3%81%AEuseEffect%E3%81%AE%E6%A7%8B%E6%96%87%E3%81%A8%E5%BC%95%E6%95%B0\" title=\"React Hooks\u306euseEffect\u306e\u69cb\u6587\u3068\u5f15\u6570\">React Hooks\u306euseEffect\u306e\u69cb\u6587\u3068\u5f15\u6570<\/a><ul class='ez-toc-list-level-4'><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/kininariantenna.com\/?p=7514\/#React_Hooks%E3%81%AEuseEffect%E3%81%AE%E6%A7%8B%E6%96%87\" title=\"React Hooks\u306euseEffect\u306e\u69cb\u6587\">React Hooks\u306euseEffect\u306e\u69cb\u6587<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/kininariantenna.com\/?p=7514\/#React_Hooks%E3%81%AEuseEffect%E3%81%AE%E5%BC%95%E6%95%B0\" title=\"React Hooks\u306euseEffect\u306e\u5f15\u6570\">React Hooks\u306euseEffect\u306e\u5f15\u6570<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/kininariantenna.com\/?p=7514\/#React_Hooks%E3%81%AEuseEffect%E3%82%92%E5%AE%9F%E8%A3%85%E3%81%99%E3%82%8B\" title=\"React Hooks\u306euseEffect\u3092\u5b9f\u88c5\u3059\u308b\">React Hooks\u306euseEffect\u3092\u5b9f\u88c5\u3059\u308b<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/kininariantenna.com\/?p=7514\/#React_Hooks%E3%81%AEuseEffect%E3%81%A7%E7%99%BB%E9%8C%B2%E3%81%8C%E3%81%95%E3%82%8C%E3%81%9F%E3%82%BF%E3%82%A4%E3%83%9F%E3%83%B3%E3%82%B0%E3%81%A7%E5%AE%9F%E8%A1%8C%E3%81%99%E3%82%8B\" title=\"React Hooks\u306euseEffect\u3067\u767b\u9332\u304c\u3055\u308c\u305f\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u5b9f\u884c\u3059\u308b\">React Hooks\u306euseEffect\u3067\u767b\u9332\u304c\u3055\u308c\u305f\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u5b9f\u884c\u3059\u308b<\/a><ul class='ez-toc-list-level-4'><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/kininariantenna.com\/?p=7514\/#%E5%88%9D%E5%9B%9E%E8%A1%A8%E7%A4%BA%E3%81%AF%E5%BF%85%E3%81%9A1%E5%9B%9EuseEffect%E3%81%8C%E5%91%BC%E3%81%B3%E5%87%BA%E3%81%95%E3%82%8C%E3%82%8B\" title=\"\u521d\u56de\u8868\u793a\u306f\u5fc5\u305a1\u56deuseEffect\u304c\u547c\u3073\u51fa\u3055\u308c\u308b\">\u521d\u56de\u8868\u793a\u306f\u5fc5\u305a1\u56deuseEffect\u304c\u547c\u3073\u51fa\u3055\u308c\u308b<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/kininariantenna.com\/?p=7514\/#%E7%99%BB%E9%8C%B2%E5%87%A6%E7%90%86%E3%82%92%E8%A1%8C%E3%81%84useEffect%E3%81%AE%E5%AE%9F%E8%A1%8C%E3%82%BF%E3%82%A4%E3%83%9F%E3%83%B3%E3%82%B0%E3%82%92%E7%A2%BA%E8%AA%8D%E3%81%99%E3%82%8B\" title=\"\u767b\u9332\u51e6\u7406\u3092\u884c\u3044useEffect\u306e\u5b9f\u884c\u30bf\u30a4\u30df\u30f3\u30b0\u3092\u78ba\u8a8d\u3059\u308b\">\u767b\u9332\u51e6\u7406\u3092\u884c\u3044useEffect\u306e\u5b9f\u884c\u30bf\u30a4\u30df\u30f3\u30b0\u3092\u78ba\u8a8d\u3059\u308b<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/kininariantenna.com\/?p=7514\/#%E3%82%B3%E3%83%BC%E3%83%89%E3%81%AE%E8%AA%AC%E6%98%8E\" title=\"\u30b3\u30fc\u30c9\u306e\u8aac\u660e\">\u30b3\u30fc\u30c9\u306e\u8aac\u660e<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/kininariantenna.com\/?p=7514\/#React_Hooks%E3%81%AEuseEffect%E3%81%A7%E4%B8%80%E5%BA%A6%E3%81%A0%E3%81%91%E5%87%A6%E7%90%86%E3%82%92%E3%81%8A%E3%81%93%E3%81%AA%E3%81%86\" title=\"React Hooks\u306euseEffect\u3067\u4e00\u5ea6\u3060\u3051\u51e6\u7406\u3092\u304a\u3053\u306a\u3046\">React Hooks\u306euseEffect\u3067\u4e00\u5ea6\u3060\u3051\u51e6\u7406\u3092\u304a\u3053\u306a\u3046<\/a><ul class='ez-toc-list-level-4'><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/kininariantenna.com\/?p=7514\/#%E5%88%9D%E5%9B%9E%E8%A1%A8%E7%A4%BA%E3%81%AF%E5%BF%85%E3%81%9A1%E5%9B%9EuseEffect%E3%81%8C%E5%91%BC%E3%81%B3%E5%87%BA%E3%81%95%E3%82%8C%E3%82%8B-2\" title=\"\u521d\u56de\u8868\u793a\u306f\u5fc5\u305a1\u56deuseEffect\u304c\u547c\u3073\u51fa\u3055\u308c\u308b\">\u521d\u56de\u8868\u793a\u306f\u5fc5\u305a1\u56deuseEffect\u304c\u547c\u3073\u51fa\u3055\u308c\u308b<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/kininariantenna.com\/?p=7514\/#%E7%99%BB%E9%8C%B2%E5%87%A6%E7%90%86%E3%82%92%E8%A1%8C%E3%81%84useEffect%E3%81%AE%E5%AE%9F%E8%A1%8C%E3%82%BF%E3%82%A4%E3%83%9F%E3%83%B3%E3%82%B0%E3%82%92%E7%A2%BA%E8%AA%8D%E3%81%99%E3%82%8B-2\" title=\"\u767b\u9332\u51e6\u7406\u3092\u884c\u3044useEffect\u306e\u5b9f\u884c\u30bf\u30a4\u30df\u30f3\u30b0\u3092\u78ba\u8a8d\u3059\u308b\">\u767b\u9332\u51e6\u7406\u3092\u884c\u3044useEffect\u306e\u5b9f\u884c\u30bf\u30a4\u30df\u30f3\u30b0\u3092\u78ba\u8a8d\u3059\u308b<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/kininariantenna.com\/?p=7514\/#1%E5%BA%A6%E3%81%A0%E3%81%91%E5%AE%9F%E8%A1%8C%E3%81%95%E3%82%8C%E3%82%8B%E3%81%AF%E3%81%9A%E3%81%8C2%E5%9B%9E%E5%AE%9F%E8%A1%8C%E3%81%95%E3%82%8C%E3%81%A6%E3%81%97%E3%81%BE%E3%81%86%E5%A0%B4%E5%90%88\" title=\"1\u5ea6\u3060\u3051\u5b9f\u884c\u3055\u308c\u308b\u306f\u305a\u304c2\u56de\u5b9f\u884c\u3055\u308c\u3066\u3057\u307e\u3046\u5834\u5408\">1\u5ea6\u3060\u3051\u5b9f\u884c\u3055\u308c\u308b\u306f\u305a\u304c2\u56de\u5b9f\u884c\u3055\u308c\u3066\u3057\u307e\u3046\u5834\u5408<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/kininariantenna.com\/?p=7514\/#React_Hooks%E3%81%AEuseEffect%E3%81%A7%E7%94%BB%E9%9D%A2%E4%B8%8A%E3%81%AE%E5%87%A6%E7%90%86%E3%81%8C%E8%A1%8C%E3%82%8F%E3%82%8C%E3%82%8B%E9%83%BD%E5%BA%A6%E3%81%A7%E5%87%A6%E7%90%86%E3%82%92%E3%81%8A%E3%81%93%E3%81%AA%E3%81%86\" title=\"React Hooks\u306euseEffect\u3067\u753b\u9762\u4e0a\u306e\u51e6\u7406\u304c\u884c\u308f\u308c\u308b\u90fd\u5ea6\u3067\u51e6\u7406\u3092\u304a\u3053\u306a\u3046\">React Hooks\u306euseEffect\u3067\u753b\u9762\u4e0a\u306e\u51e6\u7406\u304c\u884c\u308f\u308c\u308b\u90fd\u5ea6\u3067\u51e6\u7406\u3092\u304a\u3053\u306a\u3046<\/a><ul class='ez-toc-list-level-4'><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/kininariantenna.com\/?p=7514\/#%E5%88%9D%E5%9B%9E%E8%A1%A8%E7%A4%BA%E3%81%AF%E5%BF%85%E3%81%9A1%E5%9B%9EuseEffect%E3%81%8C%E5%91%BC%E3%81%B3%E5%87%BA%E3%81%95%E3%82%8C%E3%82%8B-3\" title=\"\u521d\u56de\u8868\u793a\u306f\u5fc5\u305a1\u56deuseEffect\u304c\u547c\u3073\u51fa\u3055\u308c\u308b\">\u521d\u56de\u8868\u793a\u306f\u5fc5\u305a1\u56deuseEffect\u304c\u547c\u3073\u51fa\u3055\u308c\u308b<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/kininariantenna.com\/?p=7514\/#%E7%99%BB%E9%8C%B2%E5%87%A6%E7%90%86%E3%82%92%E8%A1%8C%E3%81%84useEffect%E3%81%AE%E5%AE%9F%E8%A1%8C%E3%82%BF%E3%82%A4%E3%83%9F%E3%83%B3%E3%82%B0%E3%82%92%E7%A2%BA%E8%AA%8D%E3%81%99%E3%82%8B-3\" title=\"\u767b\u9332\u51e6\u7406\u3092\u884c\u3044useEffect\u306e\u5b9f\u884c\u30bf\u30a4\u30df\u30f3\u30b0\u3092\u78ba\u8a8d\u3059\u308b\">\u767b\u9332\u51e6\u7406\u3092\u884c\u3044useEffect\u306e\u5b9f\u884c\u30bf\u30a4\u30df\u30f3\u30b0\u3092\u78ba\u8a8d\u3059\u308b<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/kininariantenna.com\/?p=7514\/#%E3%81%95%E3%81%84%E3%81%94%E3%81%AB\" title=\"\u3055\u3044\u3054\u306b\">\u3055\u3044\u3054\u306b<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"React_Hooks%E3%81%AEuseEffect%E3%81%AE%E3%81%A8%E3%81%AF\"><\/span>React Hooks\u306euseEffect\u306e\u3068\u306f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>useEffect\u306f\u3001React Hooks\u306e\u95a2\u6570\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3067\u3001\u95a2\u6570\u3092\u30de\u30a6\u30f3\u30c8\u3084\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u5f8c\u306e\u30bf\u30a4\u30df\u30f3\u30b0\u306b\u5fdc\u3058\u3066\u5b9f\u884c\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<br \/>\n\u5177\u4f53\u7684\u306a\u51e6\u7406\u5185\u5bb9\u306fDOM\u3078\u306e\u5165\u51fa\u529b\u3001\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3084\u30d7\u30ed\u30d1\u30c6\u30a3\u306e\u4ee3\u5165\u3084\u914d\u5217\u64cd\u4f5c\u3001\u5916\u90e8API\u3068\u306e\u30c7\u30fc\u30bf\u51e6\u7406\u306a\u3069\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002<br \/>\nReact\u3067\u306f\u3053\u308c\u3089\u306e\u51e6\u7406\u3092\u526f\u4f5c\u7528\u3068\u547c\u3093\u3067\u3044\u3066\u3001\u526f\u4f5c\u7528\u3092\u304d\u3063\u304b\u3051\u306b\u3001\u95a2\u6570\u3068\u3057\u3066\u6e21\u3055\u308c\u305f\u51e6\u7406\u3092\u5b9f\u884c\u3057\u307e\u3059\u3002<\/p>\n<p><!--\u5439\u304d\u51fa\u3057\u306f\u3058\u307e\u308a--><\/p>\n<div class=\"fukidashi1\">\n<div class=\"icon\">\n<div class=\"wphg\"><img loading=\"lazy\" src=\"\/wp-content\/uploads\/2021\/07\/taka_kao3.gif\" alt=\"\u30bf\u30ab\u30d2\u30ed\" width=\"110\" height=\"110\" \/><\/div>\n<div class=\"iconfont\">\u30bf\u30ab\u30d2\u30ed<\/div>\n<\/div>\n<div class=\"bubble\">useEffect\u306f\u3001\u753b\u9762\u4e0a\u3067\u4f55\u304b\u306e\u51e6\u7406\u304c\u884c\u308f\u308c\u305f\u3064\u3044\u3067\u306b\u95a2\u6570\u306e\u51e6\u7406\u3092\u5236\u5fa1\u3067\u304d\u308b\u3082\u306e\u3068\u3068\u3089\u3048\u308b\u3068\u308f\u304b\u308a\u3084\u3059\u3044\u3067\u3057\u3087\u3046\u3002<\/div>\n<\/div>\n<p><!--\u5439\u304d\u51fa\u3057\u7d42\u308f\u308a--><\/p>\n<h2><span class=\"ez-toc-section\" id=\"React_Hooks%E3%81%AEuseEffect%E3%81%AE%E4%BD%BF%E3%81%84%E6%96%B9\"><\/span>React Hooks\u306euseEffect\u306e\u4f7f\u3044\u65b9<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>React Hooks\u306euseEffect\u306e\u4f7f\u3044\u65b9\u306b\u3064\u3044\u3066\u8aac\u660e\u3092\u3057\u307e\u3059\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"React_Hooks%E3%81%AEuseEffect%E3%81%AE%E6%A7%8B%E6%96%87%E3%81%A8%E5%BC%95%E6%95%B0\"><\/span>React Hooks\u306euseEffect\u306e\u69cb\u6587\u3068\u5f15\u6570<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>React Hooks\u306euseEffect\u306e\u69cb\u6587\u3068\u5f15\u6570\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n<h4><span class=\"ez-toc-section\" id=\"React_Hooks%E3%81%AEuseEffect%E3%81%AE%E6%A7%8B%E6%96%87\"><\/span>React Hooks\u306euseEffect\u306e\u69cb\u6587<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<div class=\"info\"><code>useEffect(\uff1c\u7b2c1\u5f15\u6570\uff1e[, \uff1c\u7b2c2\u5f15\u6570\uff1e]);<\/code><\/div>\n<h4><span class=\"ez-toc-section\" id=\"React_Hooks%E3%81%AEuseEffect%E3%81%AE%E5%BC%95%E6%95%B0\"><\/span>React Hooks\u306euseEffect\u306e\u5f15\u6570<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>&nbsp;<\/p>\n<table width=\"100%\">\n<tbody>\n<tr>\n<td>\u7b2c1\u5f15\u6570<\/td>\n<td>\u30de\u30a6\u30f3\u30c8\u3084\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u5f8c\u306b\u5b9f\u884c\u3055\u305b\u305f\u3044\u526f\u4f5c\u7528\u95a2\u6570\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<\/td>\n<\/tr>\n<tr>\n<td>\u7b2c2\u5f15\u6570<\/td>\n<td>\u526f\u4f5c\u7528\u95a2\u6570\u306e\u5b9f\u884c\u30bf\u30a4\u30df\u30f3\u30b0\u3092\u5236\u5fa1\u3059\u308b\u4f9d\u5b58\u30c7\u30fc\u30bf\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002<br \/>\n\u7a7a\u306e\u914d\u5217\u3092\u8a18\u8f09\u3057\u305f\u5834\u5408\u306f\u521d\u56de\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u5f8c\u306e\u307f\u3001\u4f55\u3082\u8a18\u8f09\u3057\u306a\u3044\u5834\u5408\u306f\u6bce\u56de\u306e\u30de\u30a6\u30f3\u30c8\u3084\u30ec\u30f3\u30c0\u30ea\u30f3\u30b0\u5f8c\u306b\u5b9f\u884c\u3055\u308c\u307e\u3059\u3002<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h4><span class=\"ez-toc-section\" id=\"React_Hooks%E3%81%AEuseEffect%E3%82%92%E5%AE%9F%E8%A3%85%E3%81%99%E3%82%8B\"><\/span>React Hooks\u306euseEffect\u3092\u5b9f\u88c5\u3059\u308b<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>React Hooks\u306euseEffect\u3092\u5b9f\u88c5\u3059\u308b\u306b\u306fuseEffect\u3092import\u3057\u307e\u3059\u3002<\/p>\n<div class=\"info\"><code>import { useEffect, useState }  from \"react\"<\/code><\/div>\n<h3><span class=\"ez-toc-section\" id=\"React_Hooks%E3%81%AEuseEffect%E3%81%A7%E7%99%BB%E9%8C%B2%E3%81%8C%E3%81%95%E3%82%8C%E3%81%9F%E3%82%BF%E3%82%A4%E3%83%9F%E3%83%B3%E3%82%B0%E3%81%A7%E5%AE%9F%E8%A1%8C%E3%81%99%E3%82%8B\"><\/span>React Hooks\u306euseEffect\u3067\u767b\u9332\u304c\u3055\u308c\u305f\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u5b9f\u884c\u3059\u308b<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u307e\u305a\u306f\u3001React Hooks\u306euseEffect\u3067\u4ee5\u4e0b\u306eTodo\u3092\u5165\u529b\u3057\u767b\u9332\u51e6\u7406\u304c\u3055\u308c\u305f\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u5b9f\u884c\u3059\u308b\u3088\u3046\u8a2d\u5b9a\u3092\u3057\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<br \/>\n\u4ee5\u4e0b\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3067\u3059\u3002<\/p>\n<pre style=\"padding: 0;\"><code class=\"language-javascript line-numbers\">import { useEffect, useState }  from \"react\"\r\nimport { useForm } from \"react-hook-form\";\r\nimport { collection, getDocs, addDoc } from \"firebase\/firestore\";\r\nimport fireStoreDB from \".\/firebase\";\r\n\r\nfunction App() {\r\n  \/\/react-hook-form \u521d\u671f\u8a2d\u5b9a\r\n  const { register, handleSubmit, formState: { errors } } = useForm();\r\n\r\n  \/\/useState\u3000\u521d\u671f\u8a2d\u5b9a\r\n  const [post, setPosts] = useState(\"\u307e\u3060\u767b\u9332\u51e6\u7406\u306f\u3055\u308c\u3066\u3044\u307e\u305b\u3093\");\r\n  const [todos, setTodos] = useState([]);\r\n\r\n  \/\/\u30c7\u30fc\u30bf\u53d6\u5f97\u7528\u914d\u5217\r\n  const arrList = [];\r\n\r\n  \/\/FireStore\u306e\u767b\u9332-\u3053\u3053\u304b\u3089\r\n  const fireStoreSubmit = async (data) =&gt; {\r\n    const { title, status, shousai } = data;\r\n    await addDoc(collection(fireStoreDB, \"todoposts\"), {\r\n      title: title,\r\n      status: status,\r\n      shousai: shousai,\r\n    });\r\n    console.log(title, status, shousai);\r\n    setPosts(\"\u767b\u9332\u51e6\u7406\u304c\u3055\u308c\u307e\u3057\u305f\");\r\n  };\r\n  \/\/FireStore\u306e\u767b\u9332-\u3053\u3053\u307e\u3067\r\n\r\n  \/\/useEffect\u306e\u51e6\u7406-\u3053\u3053\u304b\u3089\r\n  useEffect(() =&gt; {\r\n    console.log(\"useEffect\u304c\u547c\u3070\u308c\u307e\u3057\u305f\")\r\n    console.log(post);\r\n\r\n    const fireStorePostData = collection(fireStoreDB, \"todoposts\");\r\n    getDocs(fireStorePostData).then((snapShot) =&gt; {\r\n      snapShot.forEach((docs) =&gt; {\r\n        const doc = docs.data();\r\n        arrList.push({  id: docs.id ,title: doc.title ,status: doc.status, shousai: doc.shousai})\r\n      })\r\n      setTodos(arrList);\r\n    });\r\n  },[post]);\r\n  \/\/useEffect\u306e\u51e6\u7406-\u3053\u3053\u307e\u3067\r\n\r\n  return (\r\n    &lt;div&gt;\r\n      &lt;div&gt;\r\n        &lt;div&gt;\r\n          &lt;form onSubmit={handleSubmit(fireStoreSubmit)}&gt;\r\n            &lt;label&gt;\u30bf\u30a4\u30c8\u30eb\uff1a&lt;\/label&gt;&lt;br\/&gt;\r\n            &lt;input {...register(\"title\", { required: true })}  name=\"title\" \/&gt;&lt;br\/&gt;\r\n            {errors.title &amp;&amp; &lt;p&gt;\u5fc5\u9808\u3067\u3059\u3002\u30bf\u30a4\u30c8\u30eb\u3092\u5165\u529b\u3057\u3066\u304f\u3060\u3055\u3044\u3002&lt;\/p&gt;}\r\n            &lt;label&gt;\u30b9\u30c6\u30fc\u30bf\u30b9\uff1a&lt;\/label&gt;&lt;br\/&gt;\r\n            &lt;select {...register(\"status\", { required: true })}  name=\"status\"&gt;\r\n            &lt;option value=''&gt;\u2193\u30b9\u30c6\u30fc\u30bf\u30b9\u9078\u629e&lt;\/option&gt;\r\n              &lt;option value='\u672a\u7740\u624b'&gt;\u672a\u7740\u624b&lt;\/option&gt;\r\n              &lt;option value='\u4f5c\u696d\u4e2d'&gt;\u4f5c\u696d\u4e2d&lt;\/option&gt;\r\n              &lt;option value='\u5b8c\u4e86'&gt;\u5b8c\u4e86&lt;\/option&gt;\r\n            &lt;\/select&gt;\r\n            {errors.status &amp;&amp; &lt;p&gt;\u5fc5\u9808\u3067\u3059\u3002\u30b9\u30c6\u30fc\u30bf\u30b9\u3092\u9078\u629e\u3057\u3066\u304f\u3060\u3055\u3044\u3002&lt;\/p&gt;}&lt;br\/&gt;\r\n            &lt;label&gt;\u8a73\u7d30\uff1a&lt;\/label&gt;&lt;br\/&gt;\r\n            &lt;textarea {...register(\"shousai\", { maxLength: 10 })}  name=\"shousai\"\/&gt;\r\n            {errors.shousai &amp;&amp; &lt;p&gt;10\u6587\u5b57\u4ee5\u5185\u3067\u5165\u529b\u3057\u3066\u304f\u3060\u3055\u3044\u3002&lt;\/p&gt;}\r\n            &lt;br\/&gt;&lt;input type=\"submit\" value=\"\u767b\u9332\" \/&gt;\r\n\t\t      &lt;\/form&gt;\r\n        &lt;\/div&gt;\r\n     &lt;\/div&gt;\r\n      &lt;ul&gt;\r\n        {todos.map((todo) =&gt; (\r\n          &lt;li key={todo.id}&gt;\r\n            &lt;div&gt;\u30bf\u30a4\u30c8\u30eb\uff1a{todo.title}&lt;\/div&gt;\r\n            &lt;div&gt;\u30b9\u30c6\u30fc\u30bf\u30b9\uff1a{todo.status}&lt;\/div&gt;\r\n            &lt;div&gt;\u8a73\u7d30\uff1a{todo.shousai}&lt;\/div&gt;\r\n          &lt;\/li&gt;\r\n        ))}\r\n      &lt;\/ul&gt;\r\n    &lt;\/div&gt;\r\n  );\r\n}\r\n\r\nexport default App;<\/code><\/pre>\n<p>Todo\u306e\u5165\u529b\u30d5\u30a9\u30fc\u30e0\u306b\u5024\u3092\u5165\u529b\u3057\u3001\u767b\u9332\u3059\u308b\u3068\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306eFireStore\u3078\u5024\u304c\u767b\u9332\u3055\u308c\u3001\u305d\u306e\u5024\u3092\u518d\u53d6\u5f97\u3057\u3001\u753b\u9762\u4e0a\u306b\u8868\u793a\u3055\u305b\u308b\u51e6\u7406\u5185\u5bb9\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>Todo\u5165\u529b\u30d5\u30a9\u30fc\u30e0\u3068\u305d\u306e\u4e0b\u306b\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u767b\u9332\u6e08\u307f\u306e\u30ea\u30b9\u30c8\u304c\u8868\u793a\u3055\u308c\u307e\u3059\u3002<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7517\" src=\"http:\/\/kininariantenna.com\/wp-content\/uploads\/2022\/12\/120422_1405_2.png\" alt=\"\" width=\"338\" height=\"454\" \/><br \/>\nTodo\u306e\u5165\u529b\u30d5\u30a9\u30fc\u30e0\u306b\u5024\u3092\u5165\u529b\u3057\u3001\u767b\u9332\u3059\u308b\u3068<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7519\" src=\"http:\/\/kininariantenna.com\/wp-content\/uploads\/2022\/12\/120422_1405_4.png\" alt=\"\" width=\"205\" height=\"172\" \/><br \/>\n\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306eFireStore\u3078\u5024\u304c\u767b\u9332\u3055\u308c\u307e\u3059\u3002<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7522\" src=\"http:\/\/kininariantenna.com\/wp-content\/uploads\/2022\/12\/120422_1405_7.png\" alt=\"\" width=\"435\" height=\"199\" \/><br \/>\nFireStore\u306e\u30c7\u30fc\u30bf\u3092\u518d\u53d6\u5f97\u3057\u3001\u753b\u9762\u4e0a\u306b\u8868\u793a\u3055\u305b\u307e\u3059\u3002<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7523\" src=\"http:\/\/kininariantenna.com\/wp-content\/uploads\/2022\/12\/120422_1405_8.png\" alt=\"\" width=\"271\" height=\"378\" \/><\/p>\n<h4><span class=\"ez-toc-section\" id=\"%E5%88%9D%E5%9B%9E%E8%A1%A8%E7%A4%BA%E3%81%AF%E5%BF%85%E3%81%9A1%E5%9B%9EuseEffect%E3%81%8C%E5%91%BC%E3%81%B3%E5%87%BA%E3%81%95%E3%82%8C%E3%82%8B\"><\/span>\u521d\u56de\u8868\u793a\u306f\u5fc5\u305a1\u56deuseEffect\u304c\u547c\u3073\u51fa\u3055\u308c\u308b<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u521d\u56de\u8868\u793a\u306f\u5fc5\u305a1\u56deuseEffect\u304c\u547c\u3073\u51fa\u3055\u308c\u307e\u3059\u3002<br \/>\n\u30b3\u30fc\u30c9\u3092\u5b9f\u88c5\u5f8c\u3001\u30d6\u30e9\u30a6\u30b6\u3092\u7acb\u3061\u4e0a\u3052\u3001\u30b3\u30f3\u30bd\u30fc\u30eb\u3092\u78ba\u8a8d\u3059\u308b\u3068\u521d\u56de\u30e1\u30c3\u30bb\u30fc\u30b8\u304c\u51fa\u529b\u3055\u308c\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7518\" src=\"http:\/\/kininariantenna.com\/wp-content\/uploads\/2022\/12\/120422_1405_3.png\" alt=\"\" width=\"334\" height=\"116\" \/><\/p>\n<h4><span class=\"ez-toc-section\" id=\"%E7%99%BB%E9%8C%B2%E5%87%A6%E7%90%86%E3%82%92%E8%A1%8C%E3%81%84useEffect%E3%81%AE%E5%AE%9F%E8%A1%8C%E3%82%BF%E3%82%A4%E3%83%9F%E3%83%B3%E3%82%B0%E3%82%92%E7%A2%BA%E8%AA%8D%E3%81%99%E3%82%8B\"><\/span>\u767b\u9332\u51e6\u7406\u3092\u884c\u3044useEffect\u306e\u5b9f\u884c\u30bf\u30a4\u30df\u30f3\u30b0\u3092\u78ba\u8a8d\u3059\u308b<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>useEffect\u306e\u5b9f\u884c\u30bf\u30a4\u30df\u30f3\u30b0\u3092\u78ba\u8a8d\u3057\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<br \/>\n\u5024\u3092\u5165\u529b\u3057\u3001\u767b\u9332\u30dc\u30bf\u30f3\u3092\u62bc\u3057\u3066\u5b9f\u884c\u3057\u307e\u3059\u3002<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7519\" src=\"http:\/\/kininariantenna.com\/wp-content\/uploads\/2022\/12\/120422_1405_4.png\" alt=\"\" width=\"205\" height=\"172\" \/><\/p>\n<p>\u306f\u3044\u3001\u767b\u9332\u5f8c\u306buseEffect\u304c\u5b9f\u884c\u3055\u308c\u305f\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u306d\u3002<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7521\" src=\"http:\/\/kininariantenna.com\/wp-content\/uploads\/2022\/12\/120422_1405_6.png\" alt=\"\" width=\"334\" height=\"136\" \/><\/p>\n<p>\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306eFireStore\u3078\u5024\u304c\u767b\u9332\u3055\u308c\u3001<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7522\" src=\"http:\/\/kininariantenna.com\/wp-content\/uploads\/2022\/12\/120422_1405_7.png\" alt=\"\" width=\"435\" height=\"199\" \/><\/p>\n<p>\u753b\u9762\u4e0a\u306b\u767b\u9332\u3057\u305f\u5024\u304c\u30ea\u30b9\u30c8\u8868\u793a\u3055\u308c\u307e\u3057\u305f\u3002<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7520\" src=\"http:\/\/kininariantenna.com\/wp-content\/uploads\/2022\/12\/120422_1405_5.png\" alt=\"\" width=\"281\" height=\"420\" \/><\/p>\n<h4><span class=\"ez-toc-section\" id=\"%E3%82%B3%E3%83%BC%E3%83%89%E3%81%AE%E8%AA%AC%E6%98%8E\"><\/span>\u30b3\u30fc\u30c9\u306e\u8aac\u660e<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>useEffect\u306e\u7b2c\u4e8c\u5f15\u6570\u306e\u95a2\u6570\u306b\u5909\u6570\u300cpost\u300d\u3092\u6307\u5b9a\u3057\u3001\u5909\u6570\u300cpost\u300d\u304c\u5909\u5316\u3055\u308c\u308b\u30bf\u30a4\u30df\u30f3\u30b0\u306e\u307f\u5b9f\u884c\u3059\u308b\u3088\u3046\u8a2d\u5b9a\u3092\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<pre style=\"padding: 0;\"><code class=\"language-javascript line-numbers\">  useEffect(() =&gt; {\r\n   \u2026\r\n    });\r\n  },[post]);<\/code><\/pre>\n<p>\u5909\u6570\u300cpost\u300d\u306f\u767b\u9332\u51e6\u7406\u5f8c\u306bsetPosts\u30e1\u30bd\u30c3\u30c9\u3092\u901a\u3058\u3066\u5024\u3092\u4ee3\u5165\u3059\u308b\u3088\u3046\u306b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<pre style=\"padding: 0;\"><code class=\"language-javascript line-numbers\">  const fireStoreSubmit = async (data) =&gt; {\r\n   \u2026\r\n    setPosts(\"\u767b\u9332\u51e6\u7406\u304c\u3055\u308c\u307e\u3057\u305f\");\r\n  };<\/code><\/pre>\n<p><!--\u5439\u304d\u51fa\u3057\u306f\u3058\u307e\u308a--><\/p>\n<div class=\"fukidashi1\">\n<div class=\"icon\">\n<div class=\"wphg\"><img loading=\"lazy\" src=\"\/wp-content\/uploads\/2021\/07\/taka_kao3.gif\" alt=\"\u30bf\u30ab\u30d2\u30ed\" width=\"110\" height=\"110\" \/><\/div>\n<div class=\"iconfont\">\u30bf\u30ab\u30d2\u30ed<\/div>\n<\/div>\n<div class=\"bubble\">\u307e\u305a\u306f\u3001\u767b\u9332\u51e6\u7406\u306buseEffect\u3092\u4f7f\u7528\u3057\u305f\u5834\u5408\u306e\u7406\u60f3\u5f62\u3092\u5148\u306b\u8aac\u660e\u3057\u307e\u3057\u305f\u3002\u6b21\u306f\u3061\u3087\u3063\u3068\u554f\u984c\u304c\u3042\u308b\u30d1\u30bf\u30fc\u30f3\u3067useEffect\u306e\u4f7f\u7528\u4f8b\u3092\u8aac\u660e\u3057\u307e\u3059\u3002<\/div>\n<\/div>\n<p><!--\u5439\u304d\u51fa\u3057\u7d42\u308f\u308a--><\/p>\n<h3><span class=\"ez-toc-section\" id=\"React_Hooks%E3%81%AEuseEffect%E3%81%A7%E4%B8%80%E5%BA%A6%E3%81%A0%E3%81%91%E5%87%A6%E7%90%86%E3%82%92%E3%81%8A%E3%81%93%E3%81%AA%E3%81%86\"><\/span>React Hooks\u306euseEffect\u3067\u4e00\u5ea6\u3060\u3051\u51e6\u7406\u3092\u304a\u3053\u306a\u3046<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>React Hooks\u306euseEffect\u3067\u4e00\u5ea6\u3060\u3051\u51e6\u7406\u3092\u304a\u3053\u306a\u3046\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8aac\u660e\u3092\u3057\u307e\u3059\u3002<\/p>\n<p>\u540c\u3058\u304fTodo\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n<pre style=\"padding: 0;\"><code class=\"language-javascript line-numbers\">import { useEffect, useState }  from \"react\"\r\nimport { useForm } from \"react-hook-form\";\r\nimport { collection, getDocs, addDoc } from \"firebase\/firestore\";\r\nimport fireStoreDB from \".\/firebase\";\r\n\r\nfunction App() {\r\n  \/\/react-hook-form \u521d\u671f\u8a2d\u5b9a\r\n  const { register, handleSubmit, formState: { errors } } = useForm();\r\n\r\n  \/\/useState\u3000\u521d\u671f\u8a2d\u5b9a\r\n  const [post, setPosts] = useState(\"\u307e\u3060\u767b\u9332\u51e6\u7406\u306f\u3055\u308c\u3066\u3044\u307e\u305b\u3093\");\r\n  const [todos, setTodos] = useState([]);\r\n\r\n  \/\/\u30c7\u30fc\u30bf\u53d6\u5f97\u7528\u914d\u5217\r\n  const arrList = [];\r\n\r\n  \/\/FireStore\u306e\u767b\u9332-\u3053\u3053\u304b\u3089\r\n  const fireStoreSubmit = async (data) =&gt; {\r\n    const { title, status, shousai } = data;\r\n    await addDoc(collection(fireStoreDB, \"todoposts\"), {\r\n      title: title,\r\n      status: status,\r\n      shousai: shousai,\r\n    });\r\n    console.log(title, status, shousai);\r\n    setPosts(\"\u767b\u9332\u51e6\u7406\u304c\u3055\u308c\u307e\u3057\u305f\");\r\n  };\r\n  \/\/FireStore\u306e\u767b\u9332-\u3053\u3053\u307e\u3067\r\n\r\n  \/\/useEffect\u306e\u51e6\u7406-\u3053\u3053\u304b\u3089\r\n  useEffect(() =&gt; {\r\n    console.log(\"useEffect\u304c\u547c\u3070\u308c\u307e\u3057\u305f\")\r\n    console.log(post);\r\n\r\n    const fireStorePostData = collection(fireStoreDB, \"todoposts\");\r\n    getDocs(fireStorePostData).then((snapShot) =&gt; {\r\n      snapShot.forEach((docs) =&gt; {\r\n        const doc = docs.data();\r\n        arrList.push({  id: docs.id ,title: doc.title ,status: doc.status, shousai: doc.shousai})\r\n      })\r\n      setTodos(arrList);\r\n    });\r\n  },[]);\r\n  \/\/useEffect\u306e\u51e6\u7406-\u3053\u3053\u307e\u3067\r\n\r\n  return (\r\n    &lt;div&gt;\r\n      &lt;div&gt;\r\n        &lt;div&gt;\r\n          &lt;form onSubmit={handleSubmit(fireStoreSubmit)}&gt;\r\n            &lt;label&gt;\u30bf\u30a4\u30c8\u30eb\uff1a&lt;\/label&gt;&lt;br\/&gt;\r\n            &lt;input {...register(\"title\", { required: true })}  name=\"title\" \/&gt;&lt;br\/&gt;\r\n            {errors.title &amp;&amp; &lt;p&gt;\u5fc5\u9808\u3067\u3059\u3002\u30bf\u30a4\u30c8\u30eb\u3092\u5165\u529b\u3057\u3066\u304f\u3060\u3055\u3044\u3002&lt;\/p&gt;}\r\n            &lt;label&gt;\u30b9\u30c6\u30fc\u30bf\u30b9\uff1a&lt;\/label&gt;&lt;br\/&gt;\r\n            &lt;select {...register(\"status\", { required: true })}  name=\"status\"&gt;\r\n            &lt;option value=''&gt;\u2193\u30b9\u30c6\u30fc\u30bf\u30b9\u9078\u629e&lt;\/option&gt;\r\n              &lt;option value='\u672a\u7740\u624b'&gt;\u672a\u7740\u624b&lt;\/option&gt;\r\n              &lt;option value='\u4f5c\u696d\u4e2d'&gt;\u4f5c\u696d\u4e2d&lt;\/option&gt;\r\n              &lt;option value='\u5b8c\u4e86'&gt;\u5b8c\u4e86&lt;\/option&gt;\r\n            &lt;\/select&gt;\r\n            {errors.status &amp;&amp; &lt;p&gt;\u5fc5\u9808\u3067\u3059\u3002\u30b9\u30c6\u30fc\u30bf\u30b9\u3092\u9078\u629e\u3057\u3066\u304f\u3060\u3055\u3044\u3002&lt;\/p&gt;}&lt;br\/&gt;\r\n            &lt;label&gt;\u8a73\u7d30\uff1a&lt;\/label&gt;&lt;br\/&gt;\r\n            &lt;textarea {...register(\"shousai\", { maxLength: 10 })}  name=\"shousai\"\/&gt;\r\n            {errors.shousai &amp;&amp; &lt;p&gt;10\u6587\u5b57\u4ee5\u5185\u3067\u5165\u529b\u3057\u3066\u304f\u3060\u3055\u3044\u3002&lt;\/p&gt;}\r\n            &lt;br\/&gt;&lt;input type=\"submit\" value=\"\u767b\u9332\" \/&gt;\r\n\t\t      &lt;\/form&gt;\r\n        &lt;\/div&gt;\r\n     &lt;\/div&gt;\r\n      &lt;ul&gt;\r\n        {todos.map((todo) =&gt; (\r\n          &lt;li key={todo.id}&gt;\r\n            &lt;div&gt;\u30bf\u30a4\u30c8\u30eb\uff1a{todo.title}&lt;\/div&gt;\r\n            &lt;div&gt;\u30b9\u30c6\u30fc\u30bf\u30b9\uff1a{todo.status}&lt;\/div&gt;\r\n            &lt;div&gt;\u8a73\u7d30\uff1a{todo.shousai}&lt;\/div&gt;\r\n          &lt;\/li&gt;\r\n        ))}\r\n      &lt;\/ul&gt;\r\n    &lt;\/div&gt;\r\n  );\r\n}\r\n\r\nexport default App;<\/code><\/pre>\n<p>\u4e00\u5ea6\u3060\u3051\u51e6\u7406\u3092\u884c\u308f\u305b\u308b\u5834\u5408\u306fuseEffect\u306e\u7b2c\u4e8c\u5f15\u6570\u3092\u300c[]\u300d\u306b\u8a2d\u5b9a\u3057\u307e\u3059\u3002<\/p>\n<pre style=\"padding: 0;\"><code class=\"language-javascript line-numbers\">  useEffect(() =&gt; {\r\n   \u2026\r\n    });\r\n  },[]);<\/code><\/pre>\n<h4><span class=\"ez-toc-section\" id=\"%E5%88%9D%E5%9B%9E%E8%A1%A8%E7%A4%BA%E3%81%AF%E5%BF%85%E3%81%9A1%E5%9B%9EuseEffect%E3%81%8C%E5%91%BC%E3%81%B3%E5%87%BA%E3%81%95%E3%82%8C%E3%82%8B-2\"><\/span>\u521d\u56de\u8868\u793a\u306f\u5fc5\u305a1\u56deuseEffect\u304c\u547c\u3073\u51fa\u3055\u308c\u308b<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u521d\u56de\u8868\u793a\u306f\u5fc5\u305a1\u56deuseEffect\u304c\u547c\u3073\u51fa\u3055\u308c\u307e\u3059\u3002<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7518\" src=\"http:\/\/kininariantenna.com\/wp-content\/uploads\/2022\/12\/120422_1405_3.png\" alt=\"\" width=\"334\" height=\"116\" \/><\/p>\n<h4><span class=\"ez-toc-section\" id=\"%E7%99%BB%E9%8C%B2%E5%87%A6%E7%90%86%E3%82%92%E8%A1%8C%E3%81%84useEffect%E3%81%AE%E5%AE%9F%E8%A1%8C%E3%82%BF%E3%82%A4%E3%83%9F%E3%83%B3%E3%82%B0%E3%82%92%E7%A2%BA%E8%AA%8D%E3%81%99%E3%82%8B-2\"><\/span>\u767b\u9332\u51e6\u7406\u3092\u884c\u3044useEffect\u306e\u5b9f\u884c\u30bf\u30a4\u30df\u30f3\u30b0\u3092\u78ba\u8a8d\u3059\u308b<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>useEffect\u306e\u5b9f\u884c\u30bf\u30a4\u30df\u30f3\u30b0\u3092\u78ba\u8a8d\u3057\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<br \/>\n\u5024\u3092\u5165\u529b\u3057\u3001\u767b\u9332\u30dc\u30bf\u30f3\u3092\u62bc\u3057\u3066\u5b9f\u884c\u3057\u307e\u3059\u3002<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7523\" src=\"http:\/\/kininariantenna.com\/wp-content\/uploads\/2022\/12\/120422_1405_8.png\" alt=\"\" width=\"271\" height=\"378\" \/><\/p>\n<p>\u524d\u56de\u306f\u767b\u9332\u5f8c\u306buseEffect\u304c\u5b9f\u884c\u3055\u308c\u307e\u3057\u305f\u304c\u3001\u4eca\u56de\u306f\u5b9f\u884c\u3055\u308c\u307e\u305b\u3093\u306d\u3002<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7518\" src=\"http:\/\/kininariantenna.com\/wp-content\/uploads\/2022\/12\/120422_1405_3.png\" alt=\"\" width=\"334\" height=\"116\" \/><\/p>\n<p>\u305f\u3060\u3001useEffect\u3067\u306f\u306a\u3044submit\u51e6\u7406\u306f\u884c\u308f\u308c\u3066\u3044\u308b\u306e\u3067\u3001<br \/>\n\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306eFireStore\u3078\u5024\u304c\u767b\u9332\u3055\u308c\u3066\u3044\u307e\u3059\u3002<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7522\" src=\"http:\/\/kininariantenna.com\/wp-content\/uploads\/2022\/12\/120422_1405_7.png\" alt=\"\" width=\"435\" height=\"199\" \/><\/p>\n<p>useEffect\u5185\u306b\u8a18\u8f09\u3055\u308c\u3066\u3044\u308b\u30c7\u30fc\u30bf\u306e\u518d\u53d6\u5f97\u51e6\u7406\u306f\u884c\u308f\u308c\u3066\u3044\u306a\u3044\u306e\u3067\u3001<br \/>\n\u753b\u9762\u4e0a\u306b\u306e\u30ea\u30b9\u30c8\u306f\u5909\u308f\u3089\u306a\u3044\u7d50\u679c\u3068\u306a\u308a\u307e\u3059\u3002<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7523\" src=\"http:\/\/kininariantenna.com\/wp-content\/uploads\/2022\/12\/120422_1405_8.png\" alt=\"\" width=\"271\" height=\"378\" \/><\/p>\n<p><!--\u5439\u304d\u51fa\u3057\u306f\u3058\u307e\u308a--><\/p>\n<div class=\"fukidashi1\">\n<div class=\"icon\">\n<div class=\"wphg\"><img loading=\"lazy\" src=\"\/wp-content\/uploads\/2021\/07\/taka_kao3.gif\" alt=\"\u30bf\u30ab\u30d2\u30ed\" width=\"110\" height=\"110\" \/><\/div>\n<div class=\"iconfont\">\u30bf\u30ab\u30d2\u30ed<\/div>\n<\/div>\n<div class=\"bubble\">\u3053\u306e\u30d1\u30bf\u30fc\u30f3\u306e\u51e6\u7406\u306f\u753b\u9762\u63cf\u753b\u5f8c\u306e\u4e00\u5ea6\u3060\u3051\u306e\u5b9f\u884c\u306b\u306a\u308b\u3053\u3068\u306b\u6ce8\u610f\u3057\u307e\u3057\u3087\u3046\u3002\u306a\u304a\u3053\u306e\u65b9\u6cd5\u306f\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u306a\u3069\u5916\u90e8\u30c7\u30fc\u30bf\u306e\u30a2\u30af\u30bb\u30b9\u3092\u6975\u529b\u6291\u3048\u305f\u3044\u5834\u5408\u306b\u6709\u52b9\u3068\u3082\u8a00\u3048\u307e\u3059\u306d\u3002<\/div>\n<\/div>\n<p><!--\u5439\u304d\u51fa\u3057\u7d42\u308f\u308a--><\/p>\n<h3><span class=\"ez-toc-section\" id=\"1%E5%BA%A6%E3%81%A0%E3%81%91%E5%AE%9F%E8%A1%8C%E3%81%95%E3%82%8C%E3%82%8B%E3%81%AF%E3%81%9A%E3%81%8C2%E5%9B%9E%E5%AE%9F%E8%A1%8C%E3%81%95%E3%82%8C%E3%81%A6%E3%81%97%E3%81%BE%E3%81%86%E5%A0%B4%E5%90%88\"><\/span>1\u5ea6\u3060\u3051\u5b9f\u884c\u3055\u308c\u308b\u306f\u305a\u304c2\u56de\u5b9f\u884c\u3055\u308c\u3066\u3057\u307e\u3046\u5834\u5408<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>useEffect\u306e\u8a2d\u5b9a\u30671\u5ea6\u3060\u3051\u5b9f\u884c\u3055\u308c\u308b\u306f\u305a\u304c2\u56de\u5b9f\u884c\u3055\u308c\u3066\u3057\u307e\u3046\u5834\u5408\u306f\u3001\u30d0\u30b0\u3092\u8e0f\u3093\u3067\u3044\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u306e\u3067\u3001<br \/>\n\u4ee5\u4e0b\u306e\u8a18\u4e8b\u306b\u3066\u78ba\u8a8d\u3092\u3057\u3066\u307f\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<blockquote class=\"wp-embedded-content\" data-secret=\"sOFxEIvqVP\"><p><a href=\"https:\/\/kininariantenna.com\/?p=7552\">React\u3067\u521d\u56deuseEffect\u304c2\u56de\u547c\u3070\u308c\u308b\u539f\u56e0\u3068\u5bfe\u51e6\u6cd5\uff01<\/a><\/p><\/blockquote>\n<p><iframe class=\"wp-embedded-content\" sandbox=\"allow-scripts\" security=\"restricted\" style=\"position: absolute; clip: rect(1px, 1px, 1px, 1px);\" title=\"&#8220;React\u3067\u521d\u56deuseEffect\u304c2\u56de\u547c\u3070\u308c\u308b\u539f\u56e0\u3068\u5bfe\u51e6\u6cd5\uff01&#8221; &#8212; \u30ad\u30cb\u30ca\u30ea\u30a2\u30f3\u30c6\u30ca\" src=\"https:\/\/kininariantenna.com\/?p=7552&#038;embed=true#?secret=sOFxEIvqVP\" data-secret=\"sOFxEIvqVP\" width=\"600\" height=\"338\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\"><\/iframe><\/p>\n<h3><span class=\"ez-toc-section\" id=\"React_Hooks%E3%81%AEuseEffect%E3%81%A7%E7%94%BB%E9%9D%A2%E4%B8%8A%E3%81%AE%E5%87%A6%E7%90%86%E3%81%8C%E8%A1%8C%E3%82%8F%E3%82%8C%E3%82%8B%E9%83%BD%E5%BA%A6%E3%81%A7%E5%87%A6%E7%90%86%E3%82%92%E3%81%8A%E3%81%93%E3%81%AA%E3%81%86\"><\/span>React Hooks\u306euseEffect\u3067\u753b\u9762\u4e0a\u306e\u51e6\u7406\u304c\u884c\u308f\u308c\u308b\u90fd\u5ea6\u3067\u51e6\u7406\u3092\u304a\u3053\u306a\u3046<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>React Hooks\u306euseEffect\u3067\u753b\u9762\u4e0a\u306e\u51e6\u7406\u304c\u884c\u308f\u308c\u308b\u90fd\u5ea6\u3067\u51e6\u7406\u3092\u304a\u3053\u306a\u3046\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8aac\u660e\u3092\u3057\u307e\u3059\u3002<\/p>\n<p>\u540c\u3058\u304fTodo\u306e\u30b5\u30f3\u30d7\u30eb\u30b3\u30fc\u30c9\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n<pre style=\"padding: 0;\"><code class=\"language-javascript line-numbers\">import { useEffect, useState }  from \"react\"\r\nimport { useForm } from \"react-hook-form\";\r\nimport { collection, getDocs, addDoc } from \"firebase\/firestore\";\r\nimport fireStoreDB from \".\/firebase\";\r\n\r\nfunction App() {\r\n  \/\/react-hook-form \u521d\u671f\u8a2d\u5b9a\r\n  const { register, handleSubmit, formState: { errors } } = useForm();\r\n\r\n  \/\/useState\u3000\u521d\u671f\u8a2d\u5b9a\r\n  const [post, setPosts] = useState(\"\u307e\u3060\u767b\u9332\u51e6\u7406\u306f\u3055\u308c\u3066\u3044\u307e\u305b\u3093\");\r\n  const [todos, setTodos] = useState([]);\r\n\r\n  \/\/\u30c7\u30fc\u30bf\u53d6\u5f97\u7528\u914d\u5217\r\n  const arrList = [];\r\n\r\n  \/\/FireStore\u306e\u767b\u9332-\u3053\u3053\u304b\u3089\r\n  const fireStoreSubmit = async (data) =&gt; {\r\n    const { title, status, shousai } = data;\r\n    await addDoc(collection(fireStoreDB, \"todoposts\"), {\r\n      title: title,\r\n      status: status,\r\n      shousai: shousai,\r\n    });\r\n    console.log(title, status, shousai);\r\n    setPosts(\"\u767b\u9332\u51e6\u7406\u304c\u3055\u308c\u307e\u3057\u305f\");\r\n  };\r\n  \/\/FireStore\u306e\u767b\u9332-\u3053\u3053\u307e\u3067\r\n\r\n  \/\/useEffect\u306e\u51e6\u7406-\u3053\u3053\u304b\u3089\r\n  useEffect(() =&gt; {\r\n    console.log(\"useEffect\u304c\u547c\u3070\u308c\u307e\u3057\u305f\")\r\n    console.log(post);\r\n\r\n    const fireStorePostData = collection(fireStoreDB, \"todoposts\");\r\n    getDocs(fireStorePostData).then((snapShot) =&gt; {\r\n      snapShot.forEach((docs) =&gt; {\r\n        const doc = docs.data();\r\n        arrList.push({  id: docs.id ,title: doc.title ,status: doc.status, shousai: doc.shousai})\r\n      })\r\n      \/\/setTodos(arrList);\r\n    });\r\n  },);\r\n  \/\/useEffect\u306e\u51e6\u7406-\u3053\u3053\u307e\u3067\r\n\r\n  return (\r\n    &lt;div&gt;\r\n      &lt;div&gt;\r\n        &lt;div&gt;\r\n          &lt;form onSubmit={handleSubmit(fireStoreSubmit)}&gt;\r\n            &lt;label&gt;\u30bf\u30a4\u30c8\u30eb\uff1a&lt;\/label&gt;&lt;br\/&gt;\r\n            &lt;input {...register(\"title\", { required: true })}  name=\"title\" \/&gt;&lt;br\/&gt;\r\n            {errors.title &amp;&amp; &lt;p&gt;\u5fc5\u9808\u3067\u3059\u3002\u30bf\u30a4\u30c8\u30eb\u3092\u5165\u529b\u3057\u3066\u304f\u3060\u3055\u3044\u3002&lt;\/p&gt;}\r\n            &lt;label&gt;\u30b9\u30c6\u30fc\u30bf\u30b9\uff1a&lt;\/label&gt;&lt;br\/&gt;\r\n            &lt;select {...register(\"status\", { required: true })}  name=\"status\"&gt;\r\n            &lt;option value=''&gt;\u2193\u30b9\u30c6\u30fc\u30bf\u30b9\u9078\u629e&lt;\/option&gt;\r\n              &lt;option value='\u672a\u7740\u624b'&gt;\u672a\u7740\u624b&lt;\/option&gt;\r\n              &lt;option value='\u4f5c\u696d\u4e2d'&gt;\u4f5c\u696d\u4e2d&lt;\/option&gt;\r\n              &lt;option value='\u5b8c\u4e86'&gt;\u5b8c\u4e86&lt;\/option&gt;\r\n            &lt;\/select&gt;\r\n            {errors.status &amp;&amp; &lt;p&gt;\u5fc5\u9808\u3067\u3059\u3002\u30b9\u30c6\u30fc\u30bf\u30b9\u3092\u9078\u629e\u3057\u3066\u304f\u3060\u3055\u3044\u3002&lt;\/p&gt;}&lt;br\/&gt;\r\n            &lt;label&gt;\u8a73\u7d30\uff1a&lt;\/label&gt;&lt;br\/&gt;\r\n            &lt;textarea {...register(\"shousai\", { maxLength: 10 })}  name=\"shousai\"\/&gt;\r\n            {errors.shousai &amp;&amp; &lt;p&gt;10\u6587\u5b57\u4ee5\u5185\u3067\u5165\u529b\u3057\u3066\u304f\u3060\u3055\u3044\u3002&lt;\/p&gt;}\r\n            &lt;br\/&gt;&lt;input type=\"submit\" value=\"\u767b\u9332\" \/&gt;\r\n\t\t      &lt;\/form&gt;\r\n        &lt;\/div&gt;\r\n     &lt;\/div&gt;\r\n      &lt;ul&gt;\r\n        {todos.map((todo) =&gt; (\r\n          &lt;li key={todo.id}&gt;\r\n            &lt;div&gt;\u30bf\u30a4\u30c8\u30eb\uff1a{todo.title}&lt;\/div&gt;\r\n            &lt;div&gt;\u30b9\u30c6\u30fc\u30bf\u30b9\uff1a{todo.status}&lt;\/div&gt;\r\n            &lt;div&gt;\u8a73\u7d30\uff1a{todo.shousai}&lt;\/div&gt;\r\n          &lt;\/li&gt;\r\n        ))}\r\n      &lt;\/ul&gt;\r\n    &lt;\/div&gt;\r\n  );\r\n}\r\n\r\nexport default App;<\/code><\/pre>\n<p>\u968f\u6642\u51e6\u7406\u3092\u884c\u308f\u305b\u308b\u5834\u5408\u306fuseEffect\u306e\u7b2c\u4e8c\u5f15\u6570\u3092\u7a7a\u306b\u8a2d\u5b9a\u3057\u307e\u3059\u3002<\/p>\n<pre style=\"padding: 0;\"><code class=\"language-javascript line-numbers\">  useEffect(() =&gt; {\r\n   \u2026\r\n    });\r\n  },);<\/code><\/pre>\n<p>\u307e\u305fuseEffect\u306e\u4e2d\u306b\u3042\u308b\u51e6\u7406\u306f\u3044\u3063\u305f\u3093\u7121\u52b9\u5316\u3057\u307e\u3059\u3002<\/p>\n<pre style=\"padding: 0;\"><code class=\"language-javascript line-numbers\"> \/\/setTodos(arrList);<\/code><\/pre>\n<p><!--\u5439\u304d\u51fa\u3057\u306f\u3058\u307e\u308a--><\/p>\n<div class=\"fukidashi1\">\n<div class=\"icon\">\n<div class=\"wphg\"><img loading=\"lazy\" src=\"\/wp-content\/uploads\/2021\/07\/taka_kao3.gif\" alt=\"\u30bf\u30ab\u30d2\u30ed\" width=\"110\" height=\"110\" \/><\/div>\n<div class=\"iconfont\">\u30bf\u30ab\u30d2\u30ed<\/div>\n<\/div>\n<div class=\"bubble\">setTodos\u81ea\u4f53\u95a2\u6570\u3067\u3042\u308a\u3001\u95a2\u6570\u304c\u5b9f\u884c\u3059\u308b\u30bf\u30a4\u30df\u30f3\u30b0\u3067\u51e6\u7406\u304c\u884c\u308f\u308c\u308b\u7d50\u679c\u3001\u30eb\u30fc\u30d7\u72b6\u614b\u3068\u306a\u308b\u306e\u3067\u3001\u7121\u52b9\u5316\u3057\u3066\u3044\u307e\u3059\u3002<\/div>\n<\/div>\n<p><!--\u5439\u304d\u51fa\u3057\u7d42\u308f\u308a--><\/p>\n<h4><span class=\"ez-toc-section\" id=\"%E5%88%9D%E5%9B%9E%E8%A1%A8%E7%A4%BA%E3%81%AF%E5%BF%85%E3%81%9A1%E5%9B%9EuseEffect%E3%81%8C%E5%91%BC%E3%81%B3%E5%87%BA%E3%81%95%E3%82%8C%E3%82%8B-3\"><\/span>\u521d\u56de\u8868\u793a\u306f\u5fc5\u305a1\u56deuseEffect\u304c\u547c\u3073\u51fa\u3055\u308c\u308b<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>\u521d\u56de\u8868\u793a\u306f\u5fc5\u305a1\u56deuseEffect\u304c\u547c\u3073\u51fa\u3055\u308c\u307e\u3059\u3002<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7518\" src=\"http:\/\/kininariantenna.com\/wp-content\/uploads\/2022\/12\/120422_1405_3.png\" alt=\"\" width=\"334\" height=\"116\" \/><\/p>\n<h4><span class=\"ez-toc-section\" id=\"%E7%99%BB%E9%8C%B2%E5%87%A6%E7%90%86%E3%82%92%E8%A1%8C%E3%81%84useEffect%E3%81%AE%E5%AE%9F%E8%A1%8C%E3%82%BF%E3%82%A4%E3%83%9F%E3%83%B3%E3%82%B0%E3%82%92%E7%A2%BA%E8%AA%8D%E3%81%99%E3%82%8B-3\"><\/span>\u767b\u9332\u51e6\u7406\u3092\u884c\u3044useEffect\u306e\u5b9f\u884c\u30bf\u30a4\u30df\u30f3\u30b0\u3092\u78ba\u8a8d\u3059\u308b<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<p>useEffect\u306e\u5b9f\u884c\u30bf\u30a4\u30df\u30f3\u30b0\u3092\u78ba\u8a8d\u3057\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<br \/>\n\u5024\u3092\u5165\u529b\u3057\u306a\u3044\u3067\u3001\u767b\u9332\u30dc\u30bf\u30f3\u3092\u62bc\u3057\u3066\u5b9f\u884c\u3057\u307e\u3059\u3002<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7517\" src=\"http:\/\/kininariantenna.com\/wp-content\/uploads\/2022\/12\/120422_1405_2.png\" alt=\"\" width=\"338\" height=\"454\" \/><\/p>\n<p>react-hook-form\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u306b\u3088\u308b\u30a8\u30e9\u30fc\u30c1\u30a7\u30c3\u30af\u51e6\u7406\u304c\u5b9f\u884c\u3055\u308c\u3001<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7524\" src=\"http:\/\/kininariantenna.com\/wp-content\/uploads\/2022\/12\/120422_1405_9.png\" alt=\"\" width=\"296\" height=\"287\" \/><\/p>\n<p>\u305d\u306e\u30bf\u30a4\u30df\u30f3\u30b0\u3067useEffect\u304c\u5b9f\u884c\u3055\u308c\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u306d\u3002<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7525\" src=\"http:\/\/kininariantenna.com\/wp-content\/uploads\/2022\/12\/120422_1405_10.png\" alt=\"\" width=\"331\" height=\"145\" \/><\/p>\n<p><!--\u5439\u304d\u51fa\u3057\u306f\u3058\u307e\u308a--><\/p>\n<div class=\"fukidashi1\">\n<div class=\"icon\">\n<div class=\"wphg\"><img loading=\"lazy\" src=\"\/wp-content\/uploads\/2021\/07\/taka_kao3.gif\" alt=\"\u30bf\u30ab\u30d2\u30ed\" width=\"110\" height=\"110\" \/><\/div>\n<div class=\"iconfont\">\u30bf\u30ab\u30d2\u30ed<\/div>\n<\/div>\n<div class=\"bubble\">\u7b2c\u4e8c\u5f15\u6570\u306a\u3057\u306euseEffect\u306f\u5927\u91cf\u306b\u5916\u90e8\u30c7\u30fc\u30bf\u3078\u306e\u30a2\u30af\u30bb\u30b9\u304c\u884c\u308f\u308c\u308b\u5f62\u306b\u306a\u308a\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u5f71\u97ff\u304c\u51fa\u308b\u53ef\u80fd\u6027\u304c\u9ad8\u3044\u3067\u3059\u3002\u307e\u305f\u7121\u9650\u30eb\u30fc\u30d7\u3092\u5f15\u304d\u8d77\u3053\u3059\u30ea\u30b9\u30af\u304c\u3042\u308a\u307e\u3059\u306e\u3067\u3001\u5fc5\u305a\u7b2c\u4e8c\u5f15\u6570\u3092\u6307\u5b9a\u3059\u308b\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002<br \/>\n<img loading=\"lazy\" class=\"alignnone size-full wp-image-7526\" src=\"http:\/\/kininariantenna.com\/wp-content\/uploads\/2022\/12\/120422_1405_11.png\" alt=\"\" width=\"329\" height=\"442\" \/><\/div>\n<\/div>\n<p><!--\u5439\u304d\u51fa\u3057\u7d42\u308f\u308a--><\/p>\n<h2><span class=\"ez-toc-section\" id=\"%E3%81%95%E3%81%84%E3%81%94%E3%81%AB\"><\/span>\u3055\u3044\u3054\u306b<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u3044\u304b\u304c\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n<p>\u4eca\u56de\u306f\u3001<\/p>\n<div class=\"endinfo\">\u30fbReact Hooks\u306euseEffect\u306e\u4f7f\u3044\u65b9<br \/>\n\u30fbReact Hooks\u306euseEffect\u306e\u7b2c2\u5f15\u6570\u3067\u5236\u5fa1\u3059\u308b\u65b9\u6cd5<\/div>\n<p>\u306b\u3064\u3044\u3066\u307e\u3068\u3081\u307e\u3057\u305f\u3002<\/p>\n<p>\u307e\u305f\u3001\u4ed6\u306b\u3082\u4fbf\u5229\u306a\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u306e\u3067\u3001\u3088\u308d\u3057\u3051\u308c\u3070\u3054\u53c2\u7167\u9802\u3051\u308c\u3070\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u3051\u3069\u3001\u305d\u3093\u306a\u4e2d\u3067\u60a9\u3080\u3053\u3068\u306f\u3001 \u30fbReact Hooks\u306euseEffect\u306e\u4f7f\u3044\u65b9\u304c\u308f\u304b\u3089\u306a\u3044 \u30fbReact Hooks\u306euseEffect\u306e\u7b2c2\u5f15\u6570\u3067\u5236\u5fa1\u3059\u308b\u65b9\u6cd5\u304c\u308f\u304b\u3089\u306a\u3089\u3044 \u3067\u3059\u3088\u306d\u3002 \u4eca\u56de\u306f\u305d\u3093\u306a\u304a\u60a9\u307f\u3092\u89e3\u6c7a\u3059\u308b&#8230;<\/p>\n","protected":false},"author":1,"featured_media":7390,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[169],"tags":[179],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v18.4.1 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>React Hooks\u306euseEffect\u306e\u4f7f\u3044\u65b9\uff01\u7b2c2\u5f15\u6570\u306e\u65b9\u6cd5\u3082\u307e\u3068\u3081\uff01 - \u30ad\u30cb\u30ca\u30ea\u30a2\u30f3\u30c6\u30ca<\/title>\n<meta name=\"description\" content=\"\u30fbReact Hooks\u306euseEffect\u306e\u4f7f\u3044\u65b9\u30fbReact Hooks\u306euseEffect\u306e\u7b2c2\u5f15\u6570\u3067\u5236\u5fa1\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u307e\u3068\u3081\u307e\u3059\u3002\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/kininariantenna.com\/?p=7514\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"React Hooks\u306euseEffect\u306e\u4f7f\u3044\u65b9\uff01\u7b2c2\u5f15\u6570\u306e\u65b9\u6cd5\u3082\u307e\u3068\u3081\uff01 - \u30ad\u30cb\u30ca\u30ea\u30a2\u30f3\u30c6\u30ca\" \/>\n<meta property=\"og:description\" content=\"\u30fbReact Hooks\u306euseEffect\u306e\u4f7f\u3044\u65b9\u30fbReact Hooks\u306euseEffect\u306e\u7b2c2\u5f15\u6570\u3067\u5236\u5fa1\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u307e\u3068\u3081\u307e\u3059\u3002\" \/>\n<meta property=\"og:url\" content=\"https:\/\/kininariantenna.com\/?p=7514\" \/>\n<meta property=\"og:site_name\" content=\"\u30ad\u30cb\u30ca\u30ea\u30a2\u30f3\u30c6\u30ca\" \/>\n<meta property=\"article:published_time\" content=\"2022-12-04T14:24:30+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2022-12-05T13:37:08+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/kininariantenna.com\/wp-content\/uploads\/2022\/11\/kini-react.png\" \/>\n\t<meta property=\"og:image:width\" content=\"857\" \/>\n\t<meta property=\"og:image:height\" content=\"607\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u57f7\u7b46\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"kininariantenna\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u63a8\u5b9a\u8aad\u307f\u53d6\u308a\u6642\u9593\" \/>\n\t<meta name=\"twitter:data2\" content=\"28\u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebSite\",\"@id\":\"http:\/\/kininariantenna.com\/#website\",\"url\":\"http:\/\/kininariantenna.com\/\",\"name\":\"\u30ad\u30cb\u30ca\u30ea\u30a2\u30f3\u30c6\u30ca\",\"description\":\"WordPress\u958b\u767a\u304b\u3089\u30c8\u30ec\u30f3\u30c9\u307e\u3067\u6c17\u306b\u306a\u308b\u3053\u3068\u3092\u914d\u4fe1\uff01\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"http:\/\/kininariantenna.com\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"ja\"},{\"@type\":\"ImageObject\",\"@id\":\"https:\/\/kininariantenna.com\/?p=7514#primaryimage\",\"inLanguage\":\"ja\",\"url\":\"https:\/\/kininariantenna.com\/wp-content\/uploads\/2022\/11\/kini-react.png\",\"contentUrl\":\"https:\/\/kininariantenna.com\/wp-content\/uploads\/2022\/11\/kini-react.png\",\"width\":857,\"height\":607},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/kininariantenna.com\/?p=7514#webpage\",\"url\":\"https:\/\/kininariantenna.com\/?p=7514\",\"name\":\"React Hooks\u306euseEffect\u306e\u4f7f\u3044\u65b9\uff01\u7b2c2\u5f15\u6570\u306e\u65b9\u6cd5\u3082\u307e\u3068\u3081\uff01 - \u30ad\u30cb\u30ca\u30ea\u30a2\u30f3\u30c6\u30ca\",\"isPartOf\":{\"@id\":\"http:\/\/kininariantenna.com\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/kininariantenna.com\/?p=7514#primaryimage\"},\"datePublished\":\"2022-12-04T14:24:30+00:00\",\"dateModified\":\"2022-12-05T13:37:08+00:00\",\"author\":{\"@id\":\"http:\/\/kininariantenna.com\/#\/schema\/person\/79a4860130f5ccef65193ab07b022a7c\"},\"description\":\"\u30fbReact Hooks\u306euseEffect\u306e\u4f7f\u3044\u65b9\u30fbReact Hooks\u306euseEffect\u306e\u7b2c2\u5f15\u6570\u3067\u5236\u5fa1\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u307e\u3068\u3081\u307e\u3059\u3002\",\"breadcrumb\":{\"@id\":\"https:\/\/kininariantenna.com\/?p=7514#breadcrumb\"},\"inLanguage\":\"ja\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/kininariantenna.com\/?p=7514\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/kininariantenna.com\/?p=7514#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"\u30db\u30fc\u30e0\",\"item\":\"http:\/\/kininariantenna.com\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"React Hooks\u306euseEffect\u306e\u4f7f\u3044\u65b9\uff01\u7b2c2\u5f15\u6570\u306e\u65b9\u6cd5\u3082\u307e\u3068\u3081\uff01\"}]},{\"@type\":\"Person\",\"@id\":\"http:\/\/kininariantenna.com\/#\/schema\/person\/79a4860130f5ccef65193ab07b022a7c\",\"name\":\"kininariantenna\",\"image\":{\"@type\":\"ImageObject\",\"@id\":\"http:\/\/kininariantenna.com\/#personlogo\",\"inLanguage\":\"ja\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/2127fe280190de73b2a2daa819ac6e8c?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/2127fe280190de73b2a2daa819ac6e8c?s=96&d=mm&r=g\",\"caption\":\"kininariantenna\"},\"url\":\"https:\/\/kininariantenna.com\/?author=1\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"React Hooks\u306euseEffect\u306e\u4f7f\u3044\u65b9\uff01\u7b2c2\u5f15\u6570\u306e\u65b9\u6cd5\u3082\u307e\u3068\u3081\uff01 - \u30ad\u30cb\u30ca\u30ea\u30a2\u30f3\u30c6\u30ca","description":"\u30fbReact Hooks\u306euseEffect\u306e\u4f7f\u3044\u65b9\u30fbReact Hooks\u306euseEffect\u306e\u7b2c2\u5f15\u6570\u3067\u5236\u5fa1\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u307e\u3068\u3081\u307e\u3059\u3002","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/kininariantenna.com\/?p=7514","og_locale":"ja_JP","og_type":"article","og_title":"React Hooks\u306euseEffect\u306e\u4f7f\u3044\u65b9\uff01\u7b2c2\u5f15\u6570\u306e\u65b9\u6cd5\u3082\u307e\u3068\u3081\uff01 - \u30ad\u30cb\u30ca\u30ea\u30a2\u30f3\u30c6\u30ca","og_description":"\u30fbReact Hooks\u306euseEffect\u306e\u4f7f\u3044\u65b9\u30fbReact Hooks\u306euseEffect\u306e\u7b2c2\u5f15\u6570\u3067\u5236\u5fa1\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u307e\u3068\u3081\u307e\u3059\u3002","og_url":"https:\/\/kininariantenna.com\/?p=7514","og_site_name":"\u30ad\u30cb\u30ca\u30ea\u30a2\u30f3\u30c6\u30ca","article_published_time":"2022-12-04T14:24:30+00:00","article_modified_time":"2022-12-05T13:37:08+00:00","og_image":[{"width":857,"height":607,"url":"https:\/\/kininariantenna.com\/wp-content\/uploads\/2022\/11\/kini-react.png","type":"image\/png"}],"twitter_card":"summary_large_image","twitter_misc":{"\u57f7\u7b46\u8005":"kininariantenna","\u63a8\u5b9a\u8aad\u307f\u53d6\u308a\u6642\u9593":"28\u5206"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebSite","@id":"http:\/\/kininariantenna.com\/#website","url":"http:\/\/kininariantenna.com\/","name":"\u30ad\u30cb\u30ca\u30ea\u30a2\u30f3\u30c6\u30ca","description":"WordPress\u958b\u767a\u304b\u3089\u30c8\u30ec\u30f3\u30c9\u307e\u3067\u6c17\u306b\u306a\u308b\u3053\u3068\u3092\u914d\u4fe1\uff01","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"http:\/\/kininariantenna.com\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"ja"},{"@type":"ImageObject","@id":"https:\/\/kininariantenna.com\/?p=7514#primaryimage","inLanguage":"ja","url":"https:\/\/kininariantenna.com\/wp-content\/uploads\/2022\/11\/kini-react.png","contentUrl":"https:\/\/kininariantenna.com\/wp-content\/uploads\/2022\/11\/kini-react.png","width":857,"height":607},{"@type":"WebPage","@id":"https:\/\/kininariantenna.com\/?p=7514#webpage","url":"https:\/\/kininariantenna.com\/?p=7514","name":"React Hooks\u306euseEffect\u306e\u4f7f\u3044\u65b9\uff01\u7b2c2\u5f15\u6570\u306e\u65b9\u6cd5\u3082\u307e\u3068\u3081\uff01 - \u30ad\u30cb\u30ca\u30ea\u30a2\u30f3\u30c6\u30ca","isPartOf":{"@id":"http:\/\/kininariantenna.com\/#website"},"primaryImageOfPage":{"@id":"https:\/\/kininariantenna.com\/?p=7514#primaryimage"},"datePublished":"2022-12-04T14:24:30+00:00","dateModified":"2022-12-05T13:37:08+00:00","author":{"@id":"http:\/\/kininariantenna.com\/#\/schema\/person\/79a4860130f5ccef65193ab07b022a7c"},"description":"\u30fbReact Hooks\u306euseEffect\u306e\u4f7f\u3044\u65b9\u30fbReact Hooks\u306euseEffect\u306e\u7b2c2\u5f15\u6570\u3067\u5236\u5fa1\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u307e\u3068\u3081\u307e\u3059\u3002","breadcrumb":{"@id":"https:\/\/kininariantenna.com\/?p=7514#breadcrumb"},"inLanguage":"ja","potentialAction":[{"@type":"ReadAction","target":["https:\/\/kininariantenna.com\/?p=7514"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/kininariantenna.com\/?p=7514#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"\u30db\u30fc\u30e0","item":"http:\/\/kininariantenna.com\/"},{"@type":"ListItem","position":2,"name":"React Hooks\u306euseEffect\u306e\u4f7f\u3044\u65b9\uff01\u7b2c2\u5f15\u6570\u306e\u65b9\u6cd5\u3082\u307e\u3068\u3081\uff01"}]},{"@type":"Person","@id":"http:\/\/kininariantenna.com\/#\/schema\/person\/79a4860130f5ccef65193ab07b022a7c","name":"kininariantenna","image":{"@type":"ImageObject","@id":"http:\/\/kininariantenna.com\/#personlogo","inLanguage":"ja","url":"https:\/\/secure.gravatar.com\/avatar\/2127fe280190de73b2a2daa819ac6e8c?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/2127fe280190de73b2a2daa819ac6e8c?s=96&d=mm&r=g","caption":"kininariantenna"},"url":"https:\/\/kininariantenna.com\/?author=1"}]}},"_links":{"self":[{"href":"https:\/\/kininariantenna.com\/index.php?rest_route=\/wp\/v2\/posts\/7514"}],"collection":[{"href":"https:\/\/kininariantenna.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kininariantenna.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kininariantenna.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/kininariantenna.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=7514"}],"version-history":[{"count":9,"href":"https:\/\/kininariantenna.com\/index.php?rest_route=\/wp\/v2\/posts\/7514\/revisions"}],"predecessor-version":[{"id":7562,"href":"https:\/\/kininariantenna.com\/index.php?rest_route=\/wp\/v2\/posts\/7514\/revisions\/7562"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/kininariantenna.com\/index.php?rest_route=\/wp\/v2\/media\/7390"}],"wp:attachment":[{"href":"https:\/\/kininariantenna.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=7514"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kininariantenna.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=7514"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kininariantenna.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=7514"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}