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\u30dd\u30b1\u30e2\u30f3\u3060\u3063\u3066\u30b9\u30c6\u30fc\u30bf\u30b9\u304c\u6bd2\u306b\u306a\u308c\u3070\u30c0\u30e1\u30fc\u30b8\u98df\u3089\u3046\u3057\u3001\u7015\u6b7b\u306b\u306a\u3063\u305f\u3089\u6226\u3048\u306a\u3044\u3057\u3001\u305d\u3046\u3044\u3046\u30b9\u30c6\u30fc\u30bf\u30b9\u3092\u8a2d\u5b9a\u3059\u308b\u305f\u3081\u306b\u4f7f\u3046\u306e\u304cstate\u306a\u306e\u304b\u306a\uff1f<\/p>\n\n\n\n
\u3053\u308c\u304cWEB\u30b5\u30fc\u30d3\u30b9\u3060\u3063\u305f\u3089\u3069\u3046\u3044\u3046\u6a5f\u80fd\u306b\u4f7f\u308f\u308c\u3066\u3044\u308b\u306e\u304b\u306f\u3001\u307e\u3060\u3061\u3087\u3063\u3068\u308f\u304b\u3089\u3093\u3051\u3069\u306d\u3002\u30b9\u30c6\u30fc\u30bf\u30b9\u306b\u3088\u3063\u3066\u52d5\u304d\u304c\u5909\u308f\u308b\u3088\u3046\u306a\u5834\u9762\u3060\u304b\u3089\u3001\u30e6\u30fc\u30b6\u30fc\u306e\u30a2\u30ab\u30a6\u30f3\u30c8\u306e\u30ed\u30b0\u30a4\u30f3\u72b6\u614b\u3092\u7ba1\u7406\u3059\u308b\u306e\u3068\u304b\u3067\u4f7f\u3046\u306e\u304b\u306a\uff1f<\/p>\n\n\n\n
\u672a\u30ed\u30b0\u30a4\u30f3\u72b6\u614b\u306a\u3089\u30ed\u30b0\u30a4\u30f3\u753b\u9762\u3092\u51fa\u3059\u3057\u3001\u30ed\u30b0\u30a4\u30f3\u72b6\u614b\u306a\u3089\u30de\u30a4\u30da\u30fc\u30b8\u3092\u8868\u793a\u3059\u308b\u3001\u307f\u305f\u3044\u306a\u51fa\u3057\u5206\u3051\u304c\u3053\u306estate\u3067\u51fa\u6765\u308b\u3088\u3046\u306b\u306a\u308b\u306e\u304b\u3082\u3001\u3068\u60f3\u50cf\u3057\u3061\u3083\u3046\u3002\u4e00\u65e6\u4eee\u7f6e\u304d\u3067\u305d\u3046\u30a4\u30e1\u30fc\u30b8\u3057\u3066\u304a\u3053\u3046\u3002<\/p>\n\n\n\n
<\/i>state\u3092\u7406\u89e3\u3059\u308b\u305f\u3081\u306bJavaScript\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3092\u632f\u308a\u8fd4\u308b<\/span><\/div><\/h2>\n\n\n\nJavaScript\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u8003\u3048\u65b9\u3092\u3082\u3046\u4e00\u5ea6\u601d\u3044\u51fa\u3057\u307e\u3057\u305f\u3002<\/p>\n\n\n\n
\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u3044\u3046\u306e\u306f\u3053\u3046\u3044\u3046\u611f\u3058\u306e\u8a18\u8ff0<\/p>\n\n\n\n
const item = {name:\"\u30d4\u30a2\u30ce\u306e\u7c89\u672b\",price:300000};\n\nconsole.log(item.price)<\/code><\/pre>\n\n\n\n\u3053\u3046\u8a18\u8ff0\u3059\u308b\u3068\u30b3\u30f3\u30bd\u30fc\u30eb\u3067\u306f\u300c300000\u300d\u3068\u51fa\u529b\u3055\u308c\u308b\u3002<\/p>\n\n\n\n
\u3053\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u305d\u308c\u305e\u308c\u306e\u8981\u7d20\u306f\u3053\u3093\u306a\u611f\u3058<\/p>\n\n\n\n![\"\"](\"https:\/\/shinobudaisuke.com\/wp-content\/uploads\/2020\/04\/image-3-1024x357.png\")
<\/figure>\n\n\n\n\u3053\u308c\u3092\u601d\u3044\u51fa\u3057\u305f\u4e0a\u3067\u3001state\u306e\u4f7f\u3044\u65b9\u3092\u30e1\u30e2\u66f8\u304d\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
<\/i>React\u306estate\u306e\u66f8\u304d\u65b9\u3000state\u306e\u5b9a\u7fa9<\/span><\/div><\/h2>\n\n\n\nstate\u3092\u4f7f\u3046\u305f\u3081\u306b\u306f\u3001\u307e\u305a\u306fstate\u305d\u306e\u3082\u306e\u3092\u5b9a\u7fa9\u3059\u308b\u3068\u3053\u308d\u304b\u3089\u306a\u3093\u3060\u3063\u3066\u3002<\/p>\n\n\n\n
class App extends React.Component {\n constructor(props) {\n super(props);\n this.state = {name:\"\u30d4\u30a2\u30ce\u306e\u7c89\u672b\"};\n }\n\u30fb\u30fb\u30fb\u30fb\u30fb\u30fb\u30fb<\/code><\/pre>\n\n\n\n\u3053\u308c\u3067\u307e\u305a\u306fstate\u306e\u5b9a\u7fa9\u304c\u5b8c\u6210\u3057\u305f\u3001\u3089\u3057\u3044\u3002<\/p>\n\n\n\n
state\u306f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u3057\u3066\u5b9a\u7fa9\u3059\u308b<\/strong>\u3082\u306e\u3067\u3001\u305d\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4e2d\u306e\u5024\u304cstate\u306e\u521d\u671f\u5024\u306b\u306a\u308b<\/strong>\u3068\u306e\u3053\u3068\u3002\u3060\u304b\u3089\u4eca\u306estate\u306f\u300c\u30d4\u30a2\u30ce\u306e\u7c89\u672b\u300d\u306b\u306a\u308b\u306d\u3002<\/p>\n\n\n\n\u3061\u306a\u307f\u306bthis\u541b\u3001\u307c\u304f\u306f\u541b\u304c\u3069\u3063\u304b\u3089\u6765\u305f\u306e\u4f55\u8005\u306a\u306e\u304b\u308f\u304b\u3089\u306a\u3044\u3051\u3069\u3001\u3053\u308c\u304b\u3089\u3088\u308d\u3057\u304f\u306d\u3002<\/strong><\/p>\n\n\n\n\u3066\u304b\u4e0a\u306e\u30b3\u30fc\u30c9\u3067\u306fthis\u541b\u4ee5\u5916\u306b\u3082\u610f\u5473\u4e0d\u660e\u306a\u306e\u304c2\u3064\u6765\u3066\u308b\u3088\u306d\u3002<\/p>\n\n\n\n
constructor(props) {
super(props);<\/p>\n\n\n\n
\u541b\u3089\u3044\u304d\u306a\u308a\u4f55\u3088\u3063\u3066\u3044\u3046\u3002\u3067\u3082\u3053\u308c\u306f\u3082\u3046\u3001\u3053\u3046\u3044\u3046\u3082\u306e\u306a\u3093\u3060\u3063\u3066\u3055\u3002state\u3092\u5b9a\u7fa9\u3059\u308b\u3068\u304d\u306e\u5b9a\u578b\u6587\u3068\u3057\u3066\u899a\u3048\u3066\u3057\u307e\u3063\u3066\u826f\u3044<\/strong>\u3089\u3057\u3044\u3088\u3002this\u541b\u3068\u3082\u3069\u3082\u30b3\u30f3\u30b4\u30c8\u30e2\u30e8\u30ed\u30b7\u30af\u3002<\/p>\n\n\n\n\u3053\u3046\u3044\u3046\u306e\u3082\u3061\u3083\u3093\u3068\u7406\u89e3\u3057\u305f\u3044\u306a\u3068\u601d\u3044\u3064\u3064\u30011\u3064\u7406\u89e3\u3059\u308b\u30683\u3064\u308f\u304b\u3089\u306a\u3044\u3053\u3068\u304c\u5897\u3048\u308b\u3068\u3044\u3046\u85ea\u86c7\u306b\u306a\u308a\u305d\u3046\u306a\u306e\u3067\u3001\u4e00\u65e6\u3053\u3044\u3064\u3089\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3068\u306f\u3054\u7121\u6c99\u6c70\u3057\u3088\u3046\u3068\u601d\u3046\u3088\u3002<\/p>\n\n\n\n
\u3067\u3001\u3053\u3046\u3084\u3063\u3066\u5b9a\u7fa9\u3057\u305fstate\u306fthis.state\u3067\u53d6\u5f97\u3059\u308b\u3053\u3068\u304c\u51fa\u6765\u308b\u3093\u3060\u3063\u3066\u3002<\/p>\n\n\n\n
\u4f8b\u3048\u3070<\/p>\n\n\n\n
class App extends React.Component {\n constructor(props) {\n super(props);\n this.state = {name:\"\u30d4\u30a2\u30ce\u306e\u7c89\u672b\"};\n }\n\nconsole.log(this.state);\n}<\/code><\/pre>\n\n\n\n\u3063\u3066\u66f8\u304f\u3068<\/p>\n\n\n\n
{name:\"\u30d4\u30a2\u30ce\u306e\u7c89\u672b\"}<\/code><\/pre>\n\n\n\n\u3063\u3066\u51fa\u529b\u3055\u308c\u308b\u3093\u3060\u3063\u3066\u3002\u3067\u3001\u3055\u3089\u306b<\/p>\n\n\n\n
class App extends React.Component {\n constructor(props) {\n super(props);\n this.state = {name:\"\u30d4\u30a2\u30ce\u306e\u7c89\u672b\"};\n }\n\nconsole.log(this.state.name);\n}<\/code><\/pre>\n\n\n\n\u3063\u3066\u66f8\u304f\u3068\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306ename\u306e\u5024\u3092\u53d6\u5f97\u3057\u3066<\/p>\n\n\n\n
\u30d4\u30a2\u30ce\u306e\u7c89\u672b<\/code><\/pre>\n\n\n\n\u3068\u8868\u793a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3068\u3002<\/p>\n\n\n\n
<\/i>state\u306e\u5909\u66f4<\/span><\/div><\/h2>\n\n\n\n\u3053\u3053\u304b\u3089\u306fstate\u306e\u5909\u66f4\u306e\u4ed5\u65b9\u3092\u66f8\u3044\u3066\u3044\u304d\u307e\u3059\u3002state\u3092\u5909\u66f4\u3059\u308b\u306b\u306f\u300csetState()\u300d\u3068\u3044\u3046\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u3066\u3044\u304f\u3093\u3060\u3063\u3066\u3002\u3053\u3046\u8a18\u8ff0\u3059\u308b\u3089\u3057\u3044\u3002<\/p>\n\n\n\n
this.setState({\u30d7\u30ed\u30d1\u30c6\u30a3\u540d: \u5909\u66f4\u3059\u308b\u5024})<\/code><\/pre>\n\n\n\n\u3053\u306e\u8a18\u8ff0\u3092\u3059\u308b\u3053\u3068\u3067\u6307\u5b9a\u3055\u308c\u305f\u30d7\u30ed\u30d1\u30c6\u30a3\u306b\u5bfe\u5fdc\u3059\u308bstate\u306e\u5024\u304c\u5909\u66f4\u3055\u308c\u308b\u3002state\u306e\u5024\u304c\u5909\u66f4\u3055\u308c\u308b\u3053\u3068\u3067\u3001\u300cthis.state.name\u300d\u3067\u8868\u793a\u3067\u304d\u308b\u5024\u3082\u5909\u66f4\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002\u3053\u3053\u3067\u3082this\u541b\u5927\u6d3b\u8e8d\u3002\u541b\u306a\u3057\u3067\u306f\u3060\u3081\u3089\u3057\u3044\u3002<\/p>\n\n\n\n
\u3061\u306a\u307f\u306bReact\u3067\u306f\u3001state\u306e\u5024\u306b\u76f4\u63a5\u5225\u306e\u5024\u3092\u4ee3\u5165\u3059\u308b\u306e\u306f\u3060\u3081\u306a\u3093\u3060\u3063\u3066\u3002\u4f8b\u3048\u3070\u4ee5\u4e0b\u306f\u3069\u3063\u3061\u3082\u3060\u3081\u306a\u3093\u3060\u3063\u3066\u3002<\/p>\n\n\n\n
this.state = {name:'\u30d4\u30a2\u30ce\u306e\u7c89\u672b'};\n\nthis.state = '\u30d4\u30a2\u30ce\u306e\u7c89\u672b';<\/code><\/pre>\n\n\n\nstate\u306e\u5024\u3092\u5909\u66f4\u3059\u308b\u5834\u5408\u306f\u3053\u3046\u3088<\/p>\n\n\n\n
this.setState({name:'\u30e4\u30de\u30cf'});<\/code><\/pre>\n\n\n\n\u305f\u3068\u3048\u3070<\/p>\n\n\n\n
class App extends React.Component {\n constructor(props) {\n super(props);\n this.state = {name: '\u30e4\u30de\u30cf',price: 300000};\n }\n \n render() {\n return (\n \t<div>\n \t <h1>{this.state.name}\u306e\u30d4\u30a2\u30ce\u306e\u7c89\u672b\u306e\u5024\u6bb5\u306f{this.state.price}\u3067\u3059\uff01\uff01<\/h1>\n \t {\/* onClick\u306e\u51e6\u7406\u306b\u3001state\u3092\u5909\u66f4\u3059\u308b\u51e6\u7406\u3092\u52a0\u3048\u3066\u304f\u3060\u3055\u3044 *\/}\n <button onClick={() => {this.setState({name:\"\u30e4\u30de\u30cf\",price:300000})}}>\u30e4\u30de\u30cf<\/button>\n \n {\/* onClick\u306e\u51e6\u7406\u306b\u3001state\u3092\u5909\u66f4\u3059\u308b\u51e6\u7406\u3092\u52a0\u3048\u3066\u304f\u3060\u3055\u3044 *\/}\n <button onClick={() => {this.setState({name:\"\u30ab\u30ef\u30a4\",price:250000})}}>\u30ab\u30ef\u30a4<\/button>\n \n <\/div>\n );\n }\n}<\/code><\/pre>\n\n\n\n<\/p>\n\n\n\n
<\/p>\n\n\n\n
<\/p>\n\n\n\n
<\/i>state\u306e\u5909\u66f4\u3092\u30e1\u30bd\u30c3\u30c9\u5316\u3059\u308b<\/span><\/div><\/h2>\n\n\n\n\u30e1\u30bd\u30c3\u30c9\u3092\u30a4\u30d9\u30f3\u30c8\u306e\u4e2d\u3067\u547c\u3073\u51fa\u3059\u3053\u3068\u3082\u51fa\u6765\u308b\u3002\u305d\u306e\u65b9\u6cd5\u306f\u3053\u3046<\/p>\n\n\n\n
onClick={() => {this.\u30e1\u30bd\u30c3\u30c9\u540d()}}<\/code><\/pre>\n\n\n\n\u3053\u306ethis\u3063\u3066\u3044\u3046\u306e\u304c\u3001\u540c\u3058\u30d5\u30a1\u30a4\u30eb\u5185\u3067\u30e1\u30bd\u30c3\u30c9\u3092\u6307\u5b9a\u3059\u308b\u6642\u306bthis\u3092\u3064\u3051\u308b\u3093\u3060\u3063\u3066\uff01\u30e1\u30bd\u30c3\u30c9\u5316\u3057\u305f\u65b9\u304c\u3084\u3063\u3071\u308a\u8a18\u8ff0\u5c11\u306a\u304f\u3066\u6e08\u3080\u3057\u697d\u3060\u3088\u306d\u3002<\/p>\n\n\n\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
\u304a\u3063\u3057\u3083\u3001\u4eca\u56de\u306fReact\u306estate\u3092\u52c9\u5f37\u3057\u3066\u3044\u304d\u307e\u3059\u3002Progate\u306eJavaScript\u306e\u30b3\u30fc\u30b9\u3092\u3084\u3063\u305f\u76f4\u5f8c\u306bReact\u306b\u5165\u3063\u3066\u304a\u308a\u307e\u3059\u3002\u305d\u3053\u3067\u51fa\u3066\u304d\u305fstate\u3063\u3066\u3044\u3046\u3082\u306e\u306b\u95a2\u3057\u3066\u3001\u7406\u89e3\u3092\u6df1\u3081\u308b\u305f\u3081\u306b\u5099\u5fd8\u9332\u7684\u306b\u8a18 … <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[3,5],"_links":{"self":[{"href":"https:\/\/shinobudaisuke.com\/index.php?rest_route=\/wp\/v2\/posts\/31"}],"collection":[{"href":"https:\/\/shinobudaisuke.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/shinobudaisuke.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/shinobudaisuke.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/shinobudaisuke.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=31"}],"version-history":[{"count":1,"href":"https:\/\/shinobudaisuke.com\/index.php?rest_route=\/wp\/v2\/posts\/31\/revisions"}],"predecessor-version":[{"id":33,"href":"https:\/\/shinobudaisuke.com\/index.php?rest_route=\/wp\/v2\/posts\/31\/revisions\/33"}],"wp:attachment":[{"href":"https:\/\/shinobudaisuke.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=31"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/shinobudaisuke.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=31"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/shinobudaisuke.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=31"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
JavaScript\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u8003\u3048\u65b9\u3092\u3082\u3046\u4e00\u5ea6\u601d\u3044\u51fa\u3057\u307e\u3057\u305f\u3002<\/p>\n\n\n\n
\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u3044\u3046\u306e\u306f\u3053\u3046\u3044\u3046\u611f\u3058\u306e\u8a18\u8ff0<\/p>\n\n\n\n
const item = {name:\"\u30d4\u30a2\u30ce\u306e\u7c89\u672b\",price:300000};\n\nconsole.log(item.price)<\/code><\/pre>\n\n\n\n\u3053\u3046\u8a18\u8ff0\u3059\u308b\u3068\u30b3\u30f3\u30bd\u30fc\u30eb\u3067\u306f\u300c300000\u300d\u3068\u51fa\u529b\u3055\u308c\u308b\u3002<\/p>\n\n\n\n
\u3053\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u305d\u308c\u305e\u308c\u306e\u8981\u7d20\u306f\u3053\u3093\u306a\u611f\u3058<\/p>\n\n\n\n<\/figure>\n\n\n\n\u3053\u308c\u3092\u601d\u3044\u51fa\u3057\u305f\u4e0a\u3067\u3001state\u306e\u4f7f\u3044\u65b9\u3092\u30e1\u30e2\u66f8\u304d\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n
<\/i>React\u306estate\u306e\u66f8\u304d\u65b9\u3000state\u306e\u5b9a\u7fa9<\/span><\/div><\/h2>\n\n\n\nstate\u3092\u4f7f\u3046\u305f\u3081\u306b\u306f\u3001\u307e\u305a\u306fstate\u305d\u306e\u3082\u306e\u3092\u5b9a\u7fa9\u3059\u308b\u3068\u3053\u308d\u304b\u3089\u306a\u3093\u3060\u3063\u3066\u3002<\/p>\n\n\n\n
class App extends React.Component {\n constructor(props) {\n super(props);\n this.state = {name:\"\u30d4\u30a2\u30ce\u306e\u7c89\u672b\"};\n }\n\u30fb\u30fb\u30fb\u30fb\u30fb\u30fb\u30fb<\/code><\/pre>\n\n\n\n\u3053\u308c\u3067\u307e\u305a\u306fstate\u306e\u5b9a\u7fa9\u304c\u5b8c\u6210\u3057\u305f\u3001\u3089\u3057\u3044\u3002<\/p>\n\n\n\n
state\u306f\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u3068\u3057\u3066\u5b9a\u7fa9\u3059\u308b<\/strong>\u3082\u306e\u3067\u3001\u305d\u306e\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306e\u4e2d\u306e\u5024\u304cstate\u306e\u521d\u671f\u5024\u306b\u306a\u308b<\/strong>\u3068\u306e\u3053\u3068\u3002\u3060\u304b\u3089\u4eca\u306estate\u306f\u300c\u30d4\u30a2\u30ce\u306e\u7c89\u672b\u300d\u306b\u306a\u308b\u306d\u3002<\/p>\n\n\n\n\u3061\u306a\u307f\u306bthis\u541b\u3001\u307c\u304f\u306f\u541b\u304c\u3069\u3063\u304b\u3089\u6765\u305f\u306e\u4f55\u8005\u306a\u306e\u304b\u308f\u304b\u3089\u306a\u3044\u3051\u3069\u3001\u3053\u308c\u304b\u3089\u3088\u308d\u3057\u304f\u306d\u3002<\/strong><\/p>\n\n\n\n\u3066\u304b\u4e0a\u306e\u30b3\u30fc\u30c9\u3067\u306fthis\u541b\u4ee5\u5916\u306b\u3082\u610f\u5473\u4e0d\u660e\u306a\u306e\u304c2\u3064\u6765\u3066\u308b\u3088\u306d\u3002<\/p>\n\n\n\n
constructor(props) {
super(props);<\/p>\n\n\n\n
\u541b\u3089\u3044\u304d\u306a\u308a\u4f55\u3088\u3063\u3066\u3044\u3046\u3002\u3067\u3082\u3053\u308c\u306f\u3082\u3046\u3001\u3053\u3046\u3044\u3046\u3082\u306e\u306a\u3093\u3060\u3063\u3066\u3055\u3002state\u3092\u5b9a\u7fa9\u3059\u308b\u3068\u304d\u306e\u5b9a\u578b\u6587\u3068\u3057\u3066\u899a\u3048\u3066\u3057\u307e\u3063\u3066\u826f\u3044<\/strong>\u3089\u3057\u3044\u3088\u3002this\u541b\u3068\u3082\u3069\u3082\u30b3\u30f3\u30b4\u30c8\u30e2\u30e8\u30ed\u30b7\u30af\u3002<\/p>\n\n\n\n\u3053\u3046\u3044\u3046\u306e\u3082\u3061\u3083\u3093\u3068\u7406\u89e3\u3057\u305f\u3044\u306a\u3068\u601d\u3044\u3064\u3064\u30011\u3064\u7406\u89e3\u3059\u308b\u30683\u3064\u308f\u304b\u3089\u306a\u3044\u3053\u3068\u304c\u5897\u3048\u308b\u3068\u3044\u3046\u85ea\u86c7\u306b\u306a\u308a\u305d\u3046\u306a\u306e\u3067\u3001\u4e00\u65e6\u3053\u3044\u3064\u3089\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3068\u306f\u3054\u7121\u6c99\u6c70\u3057\u3088\u3046\u3068\u601d\u3046\u3088\u3002<\/p>\n\n\n\n
\u3067\u3001\u3053\u3046\u3084\u3063\u3066\u5b9a\u7fa9\u3057\u305fstate\u306fthis.state\u3067\u53d6\u5f97\u3059\u308b\u3053\u3068\u304c\u51fa\u6765\u308b\u3093\u3060\u3063\u3066\u3002<\/p>\n\n\n\n
\u4f8b\u3048\u3070<\/p>\n\n\n\n
class App extends React.Component {\n constructor(props) {\n super(props);\n this.state = {name:\"\u30d4\u30a2\u30ce\u306e\u7c89\u672b\"};\n }\n\nconsole.log(this.state);\n}<\/code><\/pre>\n\n\n\n\u3063\u3066\u66f8\u304f\u3068<\/p>\n\n\n\n
{name:\"\u30d4\u30a2\u30ce\u306e\u7c89\u672b\"}<\/code><\/pre>\n\n\n\n\u3063\u3066\u51fa\u529b\u3055\u308c\u308b\u3093\u3060\u3063\u3066\u3002\u3067\u3001\u3055\u3089\u306b<\/p>\n\n\n\n
class App extends React.Component {\n constructor(props) {\n super(props);\n this.state = {name:\"\u30d4\u30a2\u30ce\u306e\u7c89\u672b\"};\n }\n\nconsole.log(this.state.name);\n}<\/code><\/pre>\n\n\n\n\u3063\u3066\u66f8\u304f\u3068\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u306ename\u306e\u5024\u3092\u53d6\u5f97\u3057\u3066<\/p>\n\n\n\n
\u30d4\u30a2\u30ce\u306e\u7c89\u672b<\/code><\/pre>\n\n\n\n\u3068\u8868\u793a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3068\u3002<\/p>\n\n\n\n
<\/i>state\u306e\u5909\u66f4<\/span><\/div><\/h2>\n\n\n\n\u3053\u3053\u304b\u3089\u306fstate\u306e\u5909\u66f4\u306e\u4ed5\u65b9\u3092\u66f8\u3044\u3066\u3044\u304d\u307e\u3059\u3002state\u3092\u5909\u66f4\u3059\u308b\u306b\u306f\u300csetState()\u300d\u3068\u3044\u3046\u30e1\u30bd\u30c3\u30c9\u3092\u4f7f\u3063\u3066\u3044\u304f\u3093\u3060\u3063\u3066\u3002\u3053\u3046\u8a18\u8ff0\u3059\u308b\u3089\u3057\u3044\u3002<\/p>\n\n\n\n
this.setState({\u30d7\u30ed\u30d1\u30c6\u30a3\u540d: \u5909\u66f4\u3059\u308b\u5024})<\/code><\/pre>\n\n\n\n\u3053\u306e\u8a18\u8ff0\u3092\u3059\u308b\u3053\u3068\u3067\u6307\u5b9a\u3055\u308c\u305f\u30d7\u30ed\u30d1\u30c6\u30a3\u306b\u5bfe\u5fdc\u3059\u308bstate\u306e\u5024\u304c\u5909\u66f4\u3055\u308c\u308b\u3002state\u306e\u5024\u304c\u5909\u66f4\u3055\u308c\u308b\u3053\u3068\u3067\u3001\u300cthis.state.name\u300d\u3067\u8868\u793a\u3067\u304d\u308b\u5024\u3082\u5909\u66f4\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u308b\u3002\u3053\u3053\u3067\u3082this\u541b\u5927\u6d3b\u8e8d\u3002\u541b\u306a\u3057\u3067\u306f\u3060\u3081\u3089\u3057\u3044\u3002<\/p>\n\n\n\n
\u3061\u306a\u307f\u306bReact\u3067\u306f\u3001state\u306e\u5024\u306b\u76f4\u63a5\u5225\u306e\u5024\u3092\u4ee3\u5165\u3059\u308b\u306e\u306f\u3060\u3081\u306a\u3093\u3060\u3063\u3066\u3002\u4f8b\u3048\u3070\u4ee5\u4e0b\u306f\u3069\u3063\u3061\u3082\u3060\u3081\u306a\u3093\u3060\u3063\u3066\u3002<\/p>\n\n\n\n
this.state = {name:'\u30d4\u30a2\u30ce\u306e\u7c89\u672b'};\n\nthis.state = '\u30d4\u30a2\u30ce\u306e\u7c89\u672b';<\/code><\/pre>\n\n\n\nstate\u306e\u5024\u3092\u5909\u66f4\u3059\u308b\u5834\u5408\u306f\u3053\u3046\u3088<\/p>\n\n\n\n
this.setState({name:'\u30e4\u30de\u30cf'});<\/code><\/pre>\n\n\n\n\u305f\u3068\u3048\u3070<\/p>\n\n\n\n
class App extends React.Component {\n constructor(props) {\n super(props);\n this.state = {name: '\u30e4\u30de\u30cf',price: 300000};\n }\n \n render() {\n return (\n \t<div>\n \t <h1>{this.state.name}\u306e\u30d4\u30a2\u30ce\u306e\u7c89\u672b\u306e\u5024\u6bb5\u306f{this.state.price}\u3067\u3059\uff01\uff01<\/h1>\n \t {\/* onClick\u306e\u51e6\u7406\u306b\u3001state\u3092\u5909\u66f4\u3059\u308b\u51e6\u7406\u3092\u52a0\u3048\u3066\u304f\u3060\u3055\u3044 *\/}\n <button onClick={() => {this.setState({name:\"\u30e4\u30de\u30cf\",price:300000})}}>\u30e4\u30de\u30cf<\/button>\n \n {\/* onClick\u306e\u51e6\u7406\u306b\u3001state\u3092\u5909\u66f4\u3059\u308b\u51e6\u7406\u3092\u52a0\u3048\u3066\u304f\u3060\u3055\u3044 *\/}\n <button onClick={() => {this.setState({name:\"\u30ab\u30ef\u30a4\",price:250000})}}>\u30ab\u30ef\u30a4<\/button>\n \n <\/div>\n );\n }\n}<\/code><\/pre>\n\n\n\n<\/p>\n\n\n\n
<\/p>\n\n\n\n
<\/p>\n\n\n\n
<\/i>state\u306e\u5909\u66f4\u3092\u30e1\u30bd\u30c3\u30c9\u5316\u3059\u308b<\/span><\/div><\/h2>\n\n\n\n\u30e1\u30bd\u30c3\u30c9\u3092\u30a4\u30d9\u30f3\u30c8\u306e\u4e2d\u3067\u547c\u3073\u51fa\u3059\u3053\u3068\u3082\u51fa\u6765\u308b\u3002\u305d\u306e\u65b9\u6cd5\u306f\u3053\u3046<\/p>\n\n\n\n
onClick={() => {this.\u30e1\u30bd\u30c3\u30c9\u540d()}}<\/code><\/pre>\n\n\n\n\u3053\u306ethis\u3063\u3066\u3044\u3046\u306e\u304c\u3001\u540c\u3058\u30d5\u30a1\u30a4\u30eb\u5185\u3067\u30e1\u30bd\u30c3\u30c9\u3092\u6307\u5b9a\u3059\u308b\u6642\u306bthis\u3092\u3064\u3051\u308b\u3093\u3060\u3063\u3066\uff01\u30e1\u30bd\u30c3\u30c9\u5316\u3057\u305f\u65b9\u304c\u3084\u3063\u3071\u308a\u8a18\u8ff0\u5c11\u306a\u304f\u3066\u6e08\u3080\u3057\u697d\u3060\u3088\u306d\u3002<\/p>\n\n\n\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
\u304a\u3063\u3057\u3083\u3001\u4eca\u56de\u306fReact\u306estate\u3092\u52c9\u5f37\u3057\u3066\u3044\u304d\u307e\u3059\u3002Progate\u306eJavaScript\u306e\u30b3\u30fc\u30b9\u3092\u3084\u3063\u305f\u76f4\u5f8c\u306bReact\u306b\u5165\u3063\u3066\u304a\u308a\u307e\u3059\u3002\u305d\u3053\u3067\u51fa\u3066\u304d\u305fstate\u3063\u3066\u3044\u3046\u3082\u306e\u306b\u95a2\u3057\u3066\u3001\u7406\u89e3\u3092\u6df1\u3081\u308b\u305f\u3081\u306b\u5099\u5fd8\u9332\u7684\u306b\u8a18 … <\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[3,5],"_links":{"self":[{"href":"https:\/\/shinobudaisuke.com\/index.php?rest_route=\/wp\/v2\/posts\/31"}],"collection":[{"href":"https:\/\/shinobudaisuke.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/shinobudaisuke.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/shinobudaisuke.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/shinobudaisuke.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=31"}],"version-history":[{"count":1,"href":"https:\/\/shinobudaisuke.com\/index.php?rest_route=\/wp\/v2\/posts\/31\/revisions"}],"predecessor-version":[{"id":33,"href":"https:\/\/shinobudaisuke.com\/index.php?rest_route=\/wp\/v2\/posts\/31\/revisions\/33"}],"wp:attachment":[{"href":"https:\/\/shinobudaisuke.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=31"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/shinobudaisuke.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=31"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/shinobudaisuke.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=31"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}