{"id":317667,"date":"2021-02-05T00:05:36","date_gmt":"2021-02-04T16:05:36","guid":{"rendered":"http:\/\/4563.org\/?p=317667"},"modified":"2021-02-05T00:05:36","modified_gmt":"2021-02-04T16:05:36","slug":"%e8%af%b7%e6%95%99%e4%b8%80%e4%b8%aa-js-%e7%ae%ad%e5%a4%b4%e5%87%bd%e6%95%b0%e7%9a%84%e5%9f%ba%e7%a1%80%e9%97%ae%e9%a2%98","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=317667","title":{"rendered":"\u8bf7\u6559\u4e00\u4e2a js \u7bad\u5934\u51fd\u6570\u7684\u57fa\u7840\u95ee\u9898"},"content":{"rendered":"
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\u8bf7\u6559\u4e00\u4e2a js \u7bad\u5934\u51fd\u6570\u7684\u57fa\u7840\u95ee\u9898 <\/h1>\n

<\/p>\n

\n
\u8cc7\u6df1\u5927\u4f6c : volvo007 <\/span> <\/i> 2<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
<\/p>\n

\u672c\u610f\u662f\u60f3\u505a\u4e00\u4e2a\u5224\u65ad\uff0c\u5982\u679c this.goodId == 1<\/code>\uff0c\u90a3\u4e48\u5c31\u83b7\u5f97\u4e00\u4e2a 'a.json'<\/code> \u7684\u672c\u5730 url \u5b57\u7b26\u4e32\uff1b\u5982\u679c this.goodId<\/code> \u662f\u522b\u7684\u503c\uff0c\u90a3\u4e48\u5c31\u62ff\u522b\u7684\u5b57\u7b26\u4e32\u3002<\/p>\n

\u73b0\u5728\u7684\u95ee\u9898\u662f\uff0c\u8fd9\u4e48\u5199\uff1a<\/p>\n

var url = ''       url = () => {           if(this.goodId == 1){               return 'json\/laptop.json'           } else if (this.goodId == 2) {               return 'json\/mobile.json'           }       } <\/code><\/pre>\n
\u597d\u50cf\u4e0d\u592a\u884c\u3002url<\/code> \u6211\u7528 console.log<\/code> \u8c03\u7528\u540e\u663e\u793a\u5b83\u662f\u4e2a\u51fd\u6570\uff0c\u800c\u5e76\u4e0d\u662f\u4e00\u4e2a\u5b57\u7b26\u4e32<\/p>\n
\u6240\u4ee5\u80fd\u901a\u8fc7\u7bad\u5934\u51fd\u6570\u83b7\u5f97\u5b57\u7b26\u4e32\u7684\u8fd4\u56de\u503c\u5417\uff1f\u63a8\u8350\u8fd9\u6837\u505a\u5417\uff1f\uff08\u672c\u610f\u662f\u901a\u8fc7\u7bad\u5934\u51fd\u6570\u907f\u514d var that = this<\/code> \u8fd9\u79cd\u5199\u6cd5\uff0c\u8fd9\u4e48\u5199\u4ee3\u7801\u80fd\u8dd1\u8d77\u6765\uff09<\/p>\n<\/p><\/div>\n
 \u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (32<\/span>)        <\/div>\n
 <\/div>\n<\/p><\/div>\n<\/p><\/div>\n
    \n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : DrakeXiang <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u5efa\u8bae\u770b\u4e00\u4e0b this \u3001\u7bad\u5934\u51fd\u6570\u548c\u51fd\u6570\u8868\u8fbe\u5f0f\u7684\u76f8\u5173\u77e5\u8bc6\uff0c\u4f60\u8fd9\u91cc url \u5148\u8d4b\u503c\u5b57\u7b26\u4e32\uff0c\u540e\u9762\u53c8\u8d4b\u503c\u7bad\u5934\u51fd\u6570\uff0c\u7136\u540e\u4f60\u8fd8\u60f3\u901a\u8fc7 return \u6765\u6539\u53d8 url \u7684\u503c\u3002\u3002\u3002\u54ea\u513f\u54ea\u513f\u90fd\u4e0d\u5bf9\u554a\uff0c\u7b80\u5355\u6539\u7684\u8bdd\u662f\u8fd9\u6837<\/p>\n
    “`javascript
    const getJson = () => goodId === 1 ? return ‘json\/laptop.json’ : ‘json\/mobile.json’;
    const url = getJson();
    “`                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : liyang5945 <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u4f60\u628a url \u5b9a\u4e49\u6210\u4e00\u4e2a\u51fd\u6570\u4e86\uff0c\u51fd\u6570\u5fc5\u987b\u8981\u6267\u884c\u624d\u80fd\u6709\u8fd4\u56de\u503c\u554a\uff0cconsole.log(url())\uff0c\u4f60\u770b\u770b\u662f\u5565                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : Biwood <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u4e0d\u5982\u7528 Map \u6765\u5199\uff1a
    const MAP_URL = { url_1: ‘json\/laptop.json’, url_2: ‘json\/mobile.json’ };
    const url = MAP_URL[`url_${this.goodId}`];<\/p>\n
    \u975e\u8981\u7528\u51fd\u6570\u7684\u8bdd\uff0c\u53ef\u4ee5\u7528\u7acb\u5373\u6267\u884c\u51fd\u6570\uff1a
    url = (function(id){
    if(id == 1){
     return ‘json\/laptop.json’
    } else if (id == 2) {
     return ‘json\/mobile.json’
    }
    })(this.goodId)<\/p>\n
    \u5176\u5b9e\u4e09\u5143\u8fd0\u7b97\u7b26\u4e5f\u53ef\u4ee5\uff1a
    var url = (this.goodId == 1) ? ‘json\/laptop.json’ : (this.goodId == 2) ? ‘json\/mobile.json’ : ”;                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : Rocketer <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u4e0a\u6ca1\u6709\u89e3\u51b3\u4e3b\u7684\u672c\u610f\uff08\u907f\u514d var that = this \uff09<\/p>\n
    \u4e3b\u9700\u8981\u8fd9\u4e48\u7406\u89e3\u8fd9\u4ef6\u4e8b\uff0c\u9996\u5148\u770b\u4f60\u7684\u4e3b\u4f53\uff1a
    “`
    () => {
     if(this.goodId == 1) {
     return ‘json\/laptop.json’
     } else if (this.goodId == 2) {
     return ‘json\/mobile.json’
     }
    }
    “`
    \u8fd9\u660e\u663e\u662f\u4e2a\u533f\u540d\u51fd\u6570\u3002\u7136\u540e\u4f60\u628a\u8fd9\u4e2a\u533f\u540d\u51fd\u6570\u8d4b\u7ed9\u4e86 url\uff0c\u4e8e\u662f url \u5c31\u6307\u5411\u4e86\u4e00\u4e2a\u51fd\u6570\u3002<\/p>\n
    \u8fd9\u662f JavaScript \u6700\u91cd\u8981\u7684\u4e00\u4e2a\u6982\u5ff5\u2014\u2014\u4e00\u5207\u7686\u5bf9\u8c61\u3002\u51fd\u6570\u4e5f\u662f\u5bf9\u8c61\uff0c\u6240\u4ee5\u4e5f\u80fd\u8d4b\u503c\u7ed9\u8bc6\u522b\u7b26\uff08\u4fd7\u79f0\u53d8\u91cf\u540d\uff09\u3002<\/p>\n
    \u4f46\u4e3b\u60f3\u8981\u7684\u4e0d\u662f\u8fd9\u4e2a\u51fd\u6570\uff0c\u800c\u662f\u51fd\u6570\u7684\u8fd4\u56de\u503c\uff0c\u6240\u4ee5\u4f60\u5f97\u8ba9\u51fd\u6570\u6267\u884c\u4e00\u4e0b\uff08\u5957\u4e0a\u62ec\u53f7\uff0c\u540e\u9762\u518d\u52a0\u4e00\u5bf9\u62ec\u53f7\u5c31\u884c\u4e86\uff09\u3002
    “`
    (() => {
     if(this.goodId == 1) {
     return ‘json\/laptop.json’
     } else if (this.goodId == 2) {
     return ‘json\/mobile.json’
     }
    })();
    “`
    \u7136\u540e\u518d\u8d4b\u503c\u5c31\u662f\u4f60\u60f3\u8981\u7684\u5b57\u7b26\u4e32\u4e86\u3002<\/p>\n
    \u53e6\u5916\uff0c\u65e2\u7136\u4f60\u7528\u7bad\u5934\u51fd\u6570\u4e86\uff0c\u90a3\u5c31\u6700\u597d\u6309 ES6 \u7684\u6807\u51c6\u5199\uff0c\u522b\u7528 var \u4e86\u3002\u4f18\u9009 const\uff0cconst \u4e0d\u884c\u5c31 let \u3002
    \u5b8c\u6574\u4ee3\u7801\u5982\u4e0b\uff1a
    “`
    let url = ”;
    url = (() => {
     if(this.goodId == 1) {
     return ‘json\/laptop.json’
     } else if (this.goodId == 2) {
     return ‘json\/mobile.json’
     }
    })();
    “`                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : wunonglin <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u4f60\u8fd9\u662f\u4ec0\u4e48\u9b3c\u554a\u3002\u3002<\/p>\n
    “`
    const url = () => {
     switch(this.goodId){
     case 1:
     return ‘json\/laptop.json’
     case 2:
     return ‘json\/mobile.json’
     default:
     return ”
     }
    }
    “`<\/p>\n
    \u8fd9\u6837\u4e0d\u5c31\u884c\u4e86\uff1f                                                            <\/p><\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : musi <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u4f60\u628a\u7bad\u5934\u51fd\u6570\u6362\u6210\u666e\u901a\u51fd\u6570\u8fd9\u6837\u5199 URL \u7684\u503c\u4e5f\u662f\u4e2a\u51fd\u6570\u5427\uff0c\u4f60\u8fd9\u53c8\u4e0d\u662f IIFE \u96be\u9053\u7cfb\u7edf\u4f1a\u81ea\u52a8\u5e2e\u4f60\u8c03\u7528\u51fd\u6570\uff1f                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : msg7086 <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u7bad\u5934\u51fd\u6570\u7684\u8fd4\u56de\u503c\u5f53\u7136\u5c31\u662f\u7bad\u5934\u51fd\u6570()\u5566\u3002\u4f60\u4e0d\u52a0()\u5f53\u7136\u5c31\u6ca1\u6709\u8c03\u7528\u51fd\u6570\u4e86\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : sutra <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 “`
    var url = ”
    var goodId = 1;<\/p>\n
    url = (() => {
     if(goodId == 1){
     return ‘json\/laptop.json’
     } else if (goodId == 2) {
     return ‘json\/mobile.json’
     }
    })()<\/p>\n
    console.log(url)
    “`                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : randyo <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u7bad\u5934\u51fd\u6570\u4e5f\u662f\u51fd\u6570\uff0c\u9700\u8981\u8c03\u7528\u7684                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
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     \u8cc7\u6df1\u5927\u4f6c : SxqSachin <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 “`
    const url = (() =>{ … })()
    “`                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : meepo3927 <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u5148\u522b\u7ba1\u7bad\u5934\u51fd\u6570\u4e86\uff0c \u4e86\u89e3\u4e00\u4e0b javascript \u4e2d\u7684\u51fd\u6570\u7684\u5b9a\u4e49\u548c\u8c03\u7528\u5427\u3002<\/p>\n
    var url = ”;
    url = () => {};<\/p>\n
    \u4e0a\u9762\u8fd9\u4e2a\u5199\u6cd5\u662f\u6bd4\u8f83\u8ff7\u7684\uff0c\u770b\u4e0d\u51fa\u6765\u8981\u5e72\u5565\u3002                                                            <\/p><\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : vivipure <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u4f60\u5c31\u4e0d\u80fd const url = this.goodId == 1? ”:” ,\u81f3\u4e8e this \u95ee\u9898 \u4e0d\u662f\u5728\u8fd9\u91cc\u8fdb\u884c\u5904\u7406\uff0c \u800c\u662f\u53d6\u51b3\u4e8e\u4f60\u7684\u8c03\u7528                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : cczeng <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u7528 gettter \u548c setter\uff0c\u524d\u63d0\u662f url \u662f\u4e00\u4e2a\u5bf9\u8c61\u7684\u5c5e\u6027<\/p>\n
    \u4e0d\u7136\u8c03\u7528 url \u7684\u65f6\u5019 `url() ` \u800c\u4e0d\u662f `url`                                                            <\/p><\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : TanMusong <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 ()=>{xxx}\u6539\u6210
    (()=>{xxx})()                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : volvo007 <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @DrakeXiang @wunonglin \u4eba\u83dc\u763e\u5927\u662f\u8fd9\u6837\u7684\u54c8\u54c8                                                             <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : Elethom <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u770b\u4e86\u4e0a\u7684\u56de\u590d\uff0c\u6211\u89c9\u5f97\u81ea\u5df1\u8be5\u53cd\u601d\u4e00\u4e0b\u4e3a\u4ec0\u4e48\u548c\u8fd9\u4e48\u591a\u83dc\u9e21\u7ade\u4e89\u8fd8\u627e\u4e0d\u5230\u597d\u5de5\u4f5c\u4e86\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u4e3b<\/span> \u8cc7\u6df1\u5927\u4f6c : volvo007 <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @TanMusong \u6628\u665a\u770b\u4e86\u5b98\u65b9\u624b\u518c\uff0c\u4f46\u662f\u901a\u7bc7\u90fd\u5728\u8bb2\u7bad\u5934\u51fd\u6570\u600e\u4e48\u5199\uff0c\u5404\u79cd\u8334\u7684\u5199\u6cd5\uff0c\u6ca1\u6709\u6d89\u53ca\u5230\u4f20\u503c\u7684\u4f8b\u5b50\uff08\u8fd9\u4e2a\u4f30\u8ba1\u4f1a\u653e\u5230\u51fd\u6570\u91cc\u9762\u53bb\u8bb2\u5427\uff09\u3002\u6211\u5c1d\u8bd5\u8fc7\u5728\u53c2\u6570\u62ec\u53f7\u524d\u540e\u52a0 () \u4f46\u662f\u8fd8\u662f\u62a5\u9519\uff0c\u62a5\u9519\u5185\u5bb9\u90fd\u4e00\u6837\u7684\uff08\u5e9f\u8bdd\uff09\uff0c\u6ca1\u60f3\u5230\u662f\u9700\u8981\u5728\u6700\u540e\u518d\u52a0\u4e00\u4e2a\u62ec\u53f7\u8c03\u7528\u4e00\u4e0b                                                             <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : ryncv <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 “`javascript                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : bnrwnjyw <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u8fd9\u628a\u6211\u770b\u61f5\u4e86\uff0c\u4e3a\u4ec0\u4e48\u8fd9\u4e48\u591a\u534a\u540a\u5b50\u6307\u70b9\u522b\u4eba\u554a\u3002\u3002\u3002<\/p>\n
    \u4e3b\u7684\u95ee\u9898\u662f\u57fa\u7840\u4e0d\u7262\uff0c\u8fde*\u51fd\u6570*\u9700\u8981\u88ab*\u8c03\u7528*\u624d\u80fd\u83b7\u5f97\u8fd4\u56de\u503c\u90fd\u641e\u4e0d\u6e05\u695a\uff0c\u9700\u8981\u597d\u597d\u8865\u8865 js \u57fa\u7840\u3002                                                            <\/p><\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : TanMusong <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @bnrwnjyw \u4e5f\u4e0d\u662f\u5427\uff0c\u4e3b\u5c31\u95ee\u4e3a\u5565 url \u662f\u4e2a function\uff0c\u600e\u4e48\u624d\u80fd\u83b7\u5f97\u8fd4\u56de\u503c                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : abc635073826 <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u4f60\u5df2\u7ecf\u628a 1+1 \u5199\u597d\u4e86\uff0c\u5c31\u5dee\uff1d\u4e86                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
     \u8cc7\u6df1\u5927\u4f6c : GopherTT <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u5148\u8865\u8865\u57fa\u7840 \u4e0d\u7136\u5929\u5929\u95ee                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
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     \u8cc7\u6df1\u5927\u4f6c : bnrwnjyw <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @TanMusong \u4f60\u7684\u56de\u590d\u663e\u7136\u4e0d\u662f\u6211\u8bf4\u7684\u90a3\u4e9b\u534a\u540a\u5b50\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : luogege <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u4f60\u5f97\u5148\u660e\u767d url \u4ed6\u88ab\u4f60\u8d4b\u503c\u6210\u4e86\u4e2a\u51fd\u6570\uff0curl \uff08\uff09\u624d\u4f1a return \u4e1c\u897f                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : KouShuiYu <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u83b7\u5f97\u7bad\u5934\u51fd\u6570\u7684\u8fd4\u56de\u503c
    “`
    let url = (()=>{
     return ‘hello world’;
    })() 
    “`                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : cw2k13as <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 emmm\uff0curl \u4f60\u5f97\u8c03\u7528\u554a url(),goodId \u4f60\u6700\u597d\u4f5c\u4e3a\u53c2\u6570\u4f20\u8fdb\u53bb\u554a                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : darknoll <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u767e\u5ea6\u4e0b IIFE                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : nekochyan <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u7bad\u5934\u51fd\u6570\u4e5f\u662f\u4e00\u4e2a\u51fd\u6570\uff0c\u4f60\u51fd\u6570\u90fd\u6ca1\u6267\u884c\uff0c\u54ea\u6765\u7684\u8fd4\u56de\u503c\uff0c\u53ef\u4ee5\u7acb\u5373\u6267\u884c\u4e00\u6b21\u83b7\u53d6\u8fd4\u56de\u503c\u518d\u8d4b\u503c
    “`
    var url = (()=>{
     if(this.goodId == 1){
     return ‘json\/laptop.json’
     } else if (this.goodId == 2) {
     return ‘json\/mobile.json’
     }
    })()
    “`                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : KuroNekoFan <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u4f60\u9700\u8981 this free style                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : no1xsyzy <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 @volvo007 500 \u591a\u8282\u5230\u5e95\u662f\u5728\u8bb2\u4ec0\u4e48\uff1f\u75af\u4e86\u5427<\/p>\n
    \u5c31\u7b97\u4e0d\u77e5\u9053 IIFE\uff0c\u7ed9\u5b83\u4e2a\u540d\u5b57\u7136\u540e\u518d call
    getURL = () => {…}
    url = getURL()
    \u603b\u884c\u5427                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : LiubaiQ <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 \u6211\u7406\u89e3\u7684
    1. \u7ed9 url \u8d4b\u503c\u65f6\u8fd8\u6709\u989d\u5916\u7684\u903b\u8f91\uff1b
    2. \u5e0c\u671b this \u6c38\u8fdc\u6307\u5411\u5176\u521d\u59cb\u5b9a\u4e49\u65f6\u7684 Context;
    3. \u5e0c\u671b\u901a\u8fc7\u76f4\u63a5\u8d4b\u503c\u8fd9\u6837\u7684\u8bed\u6cd5\u6765\u8c03\u7528\u4e00\u4e2a func \uff1b<\/p>\n
    \u53ef\u4ee5\u8003\u8651 ES6 Class \u53ca\u5176 setter\/getter \u8bed\u6cd5\u7cd6<\/p>\n
    “`javascript
    class c {
     …
     set urlSetter = (v) => {
     this.url = v;
     }<\/p>\n
     get urlGetter = (v) => this.url
     …
    }
    “`                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
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     \u8cc7\u6df1\u5927\u4f6c : fayetitus <\/span>  <\/div>\n
     <\/i>            <\/span> <\/div>\n<\/p><\/div>\n
                                                                 https:\/\/github.com\/tc39\/proposal-do-expressions
    \u4e5f\u8bb8\u4f60\u9700\u8981\u8fd9\u4e2a\u63d0\u6848\u3002
    \u4e0d\u8fc7 do expressions \u624d stage1 \u3002\u5728\u6ca1\u6709 do expressions \u7684\u65f6\u5019\uff0c\u770b\u80fd\u4e0d\u80fd\u63a5\u53d7 IIFE\uff0c\u5982\u679c\u4e0d\u63a5\u53d7\uff0c\u90a3\u5c31\u2026\u2026\u4e0d\u4f18\u96c5\u5730\u5199\uff0c\u7231\u548b\u5199\u90fd\u884c\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n","protected":false},"excerpt":{"rendered":"
    \u8bf7\u6559\u4e00\u4e2a js \u7bad\u5934\u51fd\u6570\u7684\u57fa\u7840\u95ee\u9898…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/317667"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=317667"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/317667\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=317667"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=317667"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=317667"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}