<\/span><\/h3>\nReact Hook\u306euseState\u3072\u3068\u3064\u3067\u8907\u6570\u306eState\u3092\u7ba1\u7406\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8aac\u660e\u3092\u3057\u307e\u3059\u3002<\/p>\n
\u4f8b\u3048\u3070\u30b9\u30c6\u30fc\u30c8\u3092\u8907\u6570\u306b\u3057\u305f\u5834\u5408\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306buseState\u3082\u8907\u6570\u7528\u610f\u3059\u308b\u3053\u3068\u304c\u8003\u3048\u3089\u308c\u307e\u3059\u3002<\/p>\n
const [intNum, setCount] = useState('\u307e\u3060\u306a\u3044')\r\nconst [intNum2, setCount2] = useState('\u307e\u3060\u306a\u3044')\r\nconst [intNum3, setCount3] = useState('\u307e\u3060\u306a\u3044')<\/code><\/pre>\n\u3053\u308c\u3067\u306f\u5165\u529b\u30d5\u30a9\u30fc\u30e0\u304c\u305f\u304f\u3055\u3093\u3042\u3063\u305f\u5834\u5408\u306f\u30b3\u30fc\u30c9\u3082\u305d\u306e\u5206\u8a18\u8f09\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u305a\u8907\u96d1\u306b\u306a\u308b\u306e\u3067\u3042\u307e\u308a\u3088\u308d\u3057\u304f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n
\u305d\u3053\u3067\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u9023\u60f3\u914d\u5217\u3092useState\u5f15\u6570\u306b\u3057\u3066\u3044\u304d\u307e\u3059\u3002\u3053\u3046\u3059\u308b\u3053\u3068\u3067\u8907\u6570\u306e\u5024\u3092\u307e\u3068\u3081\u3066\u3072\u3068\u3064\u306euseState\u3078\u8a2d\u5b9a\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n
const [intTemp, setCount] = useState({\r\n intNum1: '\u307e\u3060\u306a\u3044',\r\n intNum2: '\u307e\u3060\u306a\u3044',\r\n intNum3: '\u307e\u3060\u306a\u3044'\r\n })<\/code><\/pre>\n\u5024\u5909\u66f4\u6642\u306e\u30cf\u30f3\u30c9\u30eb\u51e6\u7406\u306f\u30d5\u30a9\u30fc\u30e0\u5206\u7528\u610f\u3057\u307e\u3059\u3002\u5f15\u6570\u306e intTemp\u306f\u914d\u5217\u3068\u306a\u308b\u306e\u3067\u300c …intTemp, intNum1: e.target.value\u300d\u306e\u3088\u3046\u306b\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n
const handleEditFormChange1 = (e) => {\r\n setCount({ ...intTemp, intNum1: e.target.value })\r\n }\r\n const handleEditFormChange2 = (e) => {\r\n setCount({ ...intTemp, intNum2: e.target.value })\r\n }\r\n const handleEditFormChange3 = (e) => {\r\n setCount({ ...intTemp, intNum3: e.target.value })\r\n }<\/code><\/pre>\n\u30b3\u30fc\u30c9\u3092\u307e\u3068\u3081\u308b\u3068\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n
import ReactDOM from 'react-dom'\r\nimport React from 'react'\r\nimport { useState } from 'react'\r\n\r\nconst App = () => {\r\n const [intTemp, setCount] = useState({\r\n intNum1: '\u307e\u3060\u306a\u3044',\r\n intNum2: '\u307e\u3060\u306a\u3044',\r\n intNum3: '\u307e\u3060\u306a\u3044'\r\n })\r\n\r\n const handleEditFormChange1 = (e) => {\r\n setCount({ ...intTemp, intNum1: e.target.value })\r\n }\r\n const handleEditFormChange2 = (e) => {\r\n setCount({ ...intTemp, intNum2: e.target.value })\r\n }\r\n const handleEditFormChange3 = (e) => {\r\n setCount({ ...intTemp, intNum3: e.target.value })\r\n }\r\n\r\n return (\r\n <div>\r\n <h2>1\u3064\u76ee\u306eState\u306e\u5024\u306f{intTemp.intNum1}\u3067\u3059\u3002<\/h2>\r\n <input\r\n type=\"text\"\r\n value={intTemp.intNum1}\r\n onChange={handleEditFormChange1}\r\n \/>\r\n <h2> 2\u3064\u76ee\u306eState\u306e\u5024\u306f{intTemp.intNum2}\u3067\u3059\u3002<\/h2>\r\n <input\r\n type=\"text\"\r\n value={intTemp.intNum2}\r\n onChange={handleEditFormChange2}\r\n \/>\r\n <h2> 3\u3064\u76ee\u306eState\u306e\u5024\u306f{intTemp.intNum3}\u3067\u3059\u3002<\/h2>\r\n <input\r\n type=\"text\"\r\n value={intTemp.intNum3}\r\n onChange={handleEditFormChange3}\r\n \/>\r\n <\/div>\r\n )\r\n}\r\nReactDOM.createRoot(document.getElementById('root')).render(<App \/>)<\/code><\/pre>\n<\/span>\u5024\u3092\u8868\u793a\u3059\u308b<\/span><\/h4>\nApp.js\u306a\u3069\u5916\u90e8\u30d5\u30a1\u30a4\u30eb\u306b\u30b3\u30fc\u30c9\u3092\u8a18\u8f09\u3057\u3001html\u30d5\u30a1\u30a4\u30eb\u306e\u300c<div id=”root”><\/div>\u300d\u3078\u8868\u793a\u3055\u305b\u308b\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n
\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8868\u793a\u3055\u308c\u305f\u3089\u5b8c\u6210\u3067\u3059\u3002
\n![\"\"](\"http:\/\/kininariantenna.com\/wp-content\/uploads\/2022\/11\/112622_1655_3.png\")
<\/p>\n
<\/span>\u5024\u3092\u5909\u66f4\u3059\u308b<\/span><\/h4>\n\u6b21\u306f\u5024\u3092\u5909\u66f4\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n
\u4e00\u3064\u76ee\u306e\u5165\u529b\u30dc\u30c3\u30af\u30b9\u304b\u3089\u9806\u306b10,20,30\u3092\u5165\u529b\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n
\u5373\u6642\u306b\u8868\u793a\u3082\u5909\u308f\u308a\u307e\u3057\u305f\u306d\u3002
\n![\"\"](\"http:\/\/kininariantenna.com\/wp-content\/uploads\/2022\/11\/112622_1655_4.png\")
<\/p>\n
<\/span>\u8907\u6570\u306e\u30cf\u30f3\u30c9\u30eb\u51e6\u7406\u3092\u4e00\u3064\u306b\u307e\u3068\u3081\u308b<\/span><\/h3>\n\u524d\u56de\u3001\u5165\u529b\u30d5\u30a9\u30fc\u30e0\u5024\u5909\u66f4\u6642\u306e\u30cf\u30f3\u30c9\u30eb\u51e6\u7406\u306f\u30d5\u30a9\u30fc\u30e0\u5206\u7528\u610f\u3057\u307e\u3057\u305f\u304c\u3001\u30d5\u30a9\u30fc\u30e0\u5206\u7528\u610f\u3059\u308b\u3068\u8907\u96d1\u306b\u306a\u308a\u307e\u3059\u306e\u3067\u3001\u4e00\u3064\u306b\u307e\u3068\u3081\u308b\u3088\u3046\u306b\u3057\u307e\u3059\u3002
\n\u4ee5\u4e0b\u524d\u56de\u306e\u30cf\u30f3\u30c9\u30eb\u8a18\u8ff0\u30d1\u30bf\u30fc\u30f3\u3067\u3059\u3002<\/p>\n
const handleEditFormChange1 = (e) => {\r\n setCount({ ...intTemp, intNum1: e.target.value })\r\n }\r\n const handleEditFormChange2 = (e) => {\r\n setCount({ ...intTemp, intNum2: e.target.value })\r\n }\r\n const handleEditFormChange3 = (e) => {\r\n setCount({ ...intTemp, intNum3: e.target.value })\r\n }<\/code><\/pre>\n<\/p>\n
\n
\n
![\"\u30bf\u30ab\u30d2\u30ed\"](\"\/wp-content\/uploads\/2021\/07\/taka_kao3.gif\")
<\/div>\n
\u30bf\u30ab\u30d2\u30ed<\/div>\n<\/div>\n
\u30d5\u30a9\u30fc\u30e0\u5206\u7528\u610f\u3059\u308b\u306e\u306f\u3046\u3093\u3056\u308a\u3067\u3059\u3088\u306d…<\/div>\n<\/div>\n
<\/p>\n
\u4ee5\u4e0b\u30cf\u30f3\u30c9\u30eb\u51e6\u7406\u3092\u3072\u3068\u3064\u306b\u307e\u3068\u3081\u305f\u30b3\u30fc\u30c9\u3067\u3059\u3002<\/p>\n
import ReactDOM from 'react-dom'\r\nimport React from 'react'\r\nimport { useState } from 'react'\r\n\r\nconst App = () => {\r\n const [intTemp, setCount] = useState({\r\n intNum1: '\u307e\u3060\u306a\u3044',\r\n intNum2: '\u307e\u3060\u306a\u3044',\r\n intNum3: '\u307e\u3060\u306a\u3044'\r\n })\r\n\r\n const handleEditFormChange = (e) => {\r\n switch (e.target.name) {\r\n case 'intNum1':\r\n setCount({ ...intTemp, intNum1: e.target.value })\r\n break\r\n case 'intNum2':\r\n setCount({ ...intTemp, intNum2: e.target.value })\r\n break\r\n case 'intNum3':\r\n setCount({ ...intTemp, intNum3: e.target.value })\r\n break\r\n default:\r\n console.log('key not found')\r\n }\r\n }\r\n\r\n return (\r\n <div>\r\n <h2>1\u3064\u76ee\u306eState\u306e\u5024\u306f{intTemp.intNum1}\u3067\u3059\u3002<\/h2>\r\n <input\r\n type=\"text\"\r\n name=\"intNum1\"\r\n value={intTemp.intNum1}\r\n onChange={handleEditFormChange}\r\n \/>\r\n <h2> 2\u3064\u76ee\u306eState\u306e\u5024\u306f{intTemp.intNum2}\u3067\u3059\u3002<\/h2>\r\n <input\r\n type=\"text\"\r\n name=\"intNum2\"\r\n value={intTemp.intNum2}\r\n onChange={handleEditFormChange}\r\n \/>\r\n <h2> 3\u3064\u76ee\u306eState\u306e\u5024\u306f{intTemp.intNum3}\u3067\u3059\u3002<\/h2>\r\n <input\r\n type=\"text\"\r\n name=\"intNum3\"\r\n value={intTemp.intNum3}\r\n onChange={handleEditFormChange}\r\n \/>\r\n <\/div>\r\n )\r\n}\r\nReactDOM.createRoot(document.getElementById('root')).render(<App \/>)<\/code><\/pre>\ninput\u306bname\u5c5e\u6027\u3092\u8ffd\u52a0\u3057\u3001switch\u306b\u3088\u308a\u305d\u306e\u5024\u304b\u3089\u30b9\u30c6\u30fc\u30c8\u8a2d\u5b9a\u51e6\u7406\u3092\u5206\u3051\u308b\u3088\u3046\u306b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n
<\/span>\u5024\u3092\u5909\u66f4\u3059\u308b<\/span><\/h4>\n\u540c\u3058\u304f\u5024\u3092\u5909\u66f4\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n
\u4e00\u3064\u76ee\u306e\u5165\u529b\u30dc\u30c3\u30af\u30b9\u304b\u3089\u9806\u306b10,20,30\u3092\u5165\u529b\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n
\u9805\u76ee\u3054\u3068\u306b\u5024\u304c\u5909\u308f\u308a\u307e\u3057\u305f\u306d\u3002
\n<\/p>\n
<\/p>\n
\n
\n
<\/div>\n
\u30bf\u30ab\u30d2\u30ed<\/div>\n<\/div>\n
setCount({ …intTemp, e.target.name: e.target.value })\u306e\u3088\u3046\u306b\u3067\u304d\u308c\u3070switch\u4e0d\u8981\u30671\u884c\u3067\u6e08\u3093\u3060\u306e\u3067\u3059\u304c\u3001\u30a8\u30e9\u30fc\u3068\u306a\u308a\u3067\u304d\u307e\u305b\u3093\u3067\u3057\u305f\u3002\u6b8b\u5ff5…<\/div>\n<\/div>\n
<\/p>\n
<\/span>\uff1c\u8ffd\u8a18\uff1a\u6539\u826f\u7248\uff1e\u8907\u6570\u306e\u30cf\u30f3\u30c9\u30eb\u51e6\u7406\u3092\u4e00\u3064\u306b\u307e\u3068\u3081\u308b<\/span><\/h3>\nswitch\u4e0d\u8981\u30671\u884c\u3067\u6e08\u307e\u305b\u308b\u65b9\u6cd5\u304c\u308f\u304b\u308a\u307e\u3057\u305f\u306e\u3067\u3001\u8ffd\u8a18\u3057\u307e\u3059\u3002
\n\u30ab\u30e9\u30e0\u90e8\u5206\u306b\u76f4\u63a5\u5909\u6570\u3092\u4ee3\u5165\u3059\u308b\u3068\u30a8\u30e9\u30fc\u3068\u306a\u308a\u307e\u3059\u304c\u3001[]\u3067\u304f\u304f\u308b\u3053\u3068\u306b\u3088\u308a\u30a8\u30e9\u30fc\u3092\u56de\u907f\u3057\u3001\u6709\u52b9\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
const handleEditFormChange = (e) => {\r\n setCount({ ...intTemp, [e.target.name]: e.target.value })\r\n }<\/code><\/pre>\n\u6539\u826f\u7248\u30b3\u30fc\u30c9\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n
import ReactDOM from 'react-dom'\r\nimport React from 'react'\r\nimport { useState } from 'react'\r\n\r\nconst App = () => {\r\n const [intTemp, setCount] = useState({\r\n intNum1: '\u307e\u3060\u306a\u3044',\r\n intNum2: '\u307e\u3060\u306a\u3044',\r\n intNum3: '\u307e\u3060\u306a\u3044'\r\n })\r\n\r\n const handleEditFormChange = (e) => {\r\n setCount({ ...intTemp, [e.target.name]: e.target.value })\r\n }\r\n return (\r\n <div>\r\n <h2>1\u3064\u76ee\u306eState\u306e\u5024\u306f{intTemp.intNum1}\u3067\u3059\u3002<\/h2>\r\n <input\r\n type=\"text\"\r\n name=\"intNum1\"\r\n value={intTemp.intNum1}\r\n onChange={handleEditFormChange}\r\n \/>\r\n <h2> 2\u3064\u76ee\u306eState\u306e\u5024\u306f{intTemp.intNum2}\u3067\u3059\u3002<\/h2>\r\n <input\r\n type=\"text\"\r\n name=\"intNum2\"\r\n value={intTemp.intNum2}\r\n onChange={handleEditFormChange}\r\n \/>\r\n <h2> 3\u3064\u76ee\u306eState\u306e\u5024\u306f{intTemp.intNum3}\u3067\u3059\u3002<\/h2>\r\n <input\r\n type=\"text\"\r\n name=\"intNum3\"\r\n value={intTemp.intNum3}\r\n onChange={handleEditFormChange}\r\n \/>\r\n <\/div>\r\n )\r\n}\r\nReactDOM.createRoot(document.getElementById('root')).render(<App \/>)<\/code><\/pre>\n<\/p>\n
\n
\n
<\/div>\n
\u30bf\u30ab\u30d2\u30ed<\/div>\n<\/div>\n
\u7e70\u308a\u8fd4\u3057\u5206\u306e\u30b3\u30fc\u30c9\u304c\u6e1b\u3063\u305f\u5206\u3059\u3063\u304d\u308a\u3057\u307e\u3057\u305f\u306d\u3002<\/div>\n<\/div>\n
<\/p>\n
\u52d5\u4f5c\u3082\u554f\u984c\u3042\u308a\u307e\u305b\u3093\u306d\u3002
\n<\/p>\n
<\/span>\u3055\u3044\u3054\u306b<\/span><\/h2>\n\u3044\u304b\u304c\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n
\u4eca\u56de\u306f\u3001<\/p>\n
\u30fbReact Hook\u306euseState\u306e\u4f7f\u3044\u65b9
\n\u30fbReact Hook\u306euseState\u3072\u3068\u3064\u3067\u8907\u6570\u306eState\u3092\u7ba1\u7406\u3059\u308b\u65b9\u6cd5<\/div>\n
\u306b\u3064\u3044\u3066\u307e\u3068\u3081\u307e\u3057\u305f\u3002<\/p>\n
\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":"
React Hook\u306euseState\u306e\u4f7f\u3044\u65b9\u3092\u77e5\u308a\u305f\u3044\u3068\u304d\u306f\u306a\u3044\u3067\u3057\u3087\u3046\u304b\u3002 \u3051\u3069\u3001\u305d\u3093\u306a\u4e2d\u3067\u60a9\u3080\u3053\u3068\u306f\u3001 \u30fbReact Hook\u306euseState\u306e\u4f7f\u3044\u65b9\u304c\u308f\u304b\u3089\u306a\u3044 \u30fbReact Hook\u306euseState\u3067\u8907\u6570\u306e…<\/p>\n","protected":false},"author":1,"featured_media":7390,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[169],"tags":[179,174],"yoast_head":"\n
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