{"id":586,"date":"2024-04-04T20:12:41","date_gmt":"2024-04-04T12:12:41","guid":{"rendered":"https:\/\/fugary.com\/?p=586"},"modified":"2024-04-04T21:25:21","modified_gmt":"2024-04-04T13:25:21","slug":"js%e5%92%8ces%e5%9f%ba%e7%a1%80%e4%b8%8e%e5%b8%b8%e7%94%a8%e6%8a%80%e5%b7%a7","status":"publish","type":"post","link":"https:\/\/fugary.com\/?p=586","title":{"rendered":"JS\u548cES6\u57fa\u7840\u4e0e\u5e38\u7528\u6280\u5de7"},"content":{"rendered":"

AI\u6458\u8981<\/h3>\n

\u8fd9\u7bc7\u6587\u7ae0\u6df1\u5165\u4ecb\u7ecd\u4e86 JavaScript \u548c ES \u57fa\u7840\u77e5\u8bc6\u4ee5\u53ca\u5e38\u7528\u6280\u5de7\u3002\u6587\u7ae0\u9996\u5148\u8ba8\u8bba\u4e86\u53d8\u91cf\u57fa\u7840\uff0c\u5305\u62ec\u4e0d\u540c\u7684\u58f0\u660e\u65b9\u5f0f\u548c\u5e38\u7528\u6570\u636e\u7c7b\u578b\u3002\u63a5\u7740\u8be6\u7ec6\u89e3\u91ca\u4e86\u53d8\u91cf\u58f0\u660e\u3001\u4f5c\u7528\u57df\u3001\u76f8\u7b49\u5224\u65ad\u548c\u7a7a\u6570\u636e\u5224\u65ad\u7b49\u5185\u5bb9\u3002\u968f\u540e\uff0c\u6587\u7ae0\u4ecb\u7ecd\u4e86\u5bf9\u8c61\u548c\u6570\u7ec4\u7684\u64cd\u4f5c\u65b9\u6cd5\uff0c\u5e76\u8ba8\u8bba\u4e86\u5e38\u89c1\u7684\u5b57\u7b26\u4e32\u62fc\u63a5\u548c\u7b80\u5355\u7c7b\u578b\u8f6c\u6362\u6280\u5de7\u3002\u6b64\u5916\uff0c\u6587\u7ae0\u8fd8\u6d89\u53ca\u4e86\u7f51\u9875\u5b9a\u65f6\u4efb\u52a1\u3001Promise\u3001\u51fd\u6570\u4e0e\u7bad\u5934\u51fd\u6570\u3001\u6a21\u5757\u5316\u7b49\u4e3b\u9898\uff0c\u4e3a\u8bfb\u8005\u63d0\u4f9b\u4e86\u4e30\u5bcc\u7684\u77e5\u8bc6\u5185\u5bb9\u548c\u5b9e\u7528\u6280\u5de7\u3002<\/p>\n

\u53d8\u91cf\u57fa\u7840<\/h3>\n

JS<\/code>\u53d8\u91cf\u4e00\u822c\u53ef\u4ee5\u7528var<\/code>\uff0cconst<\/code>\u548clet<\/code>\u58f0\u660e\uff0c\u8001\u7248\u672c\u53ef\u4ee5\u76f4\u63a5\u8d4b\u503c\uff0c\u4e0d\u7528\u58f0\u660e\u3002<\/p>\n

\u5e38\u7528\u7c7b\u578b\uff1a\u672a\u5b9a\u4e49\uff08undefined\uff09\u3001\u7a7a\uff08null\uff09\u3001\u6570\u5b57\uff08Number\uff09\u3001\u5b57\u7b26\u4e32\uff08String\uff09\u3001\u5e03\u5c14\u503c\uff08Boolean\uff09\u3001\u7b26\u53f7\uff08Symbol\uff09\u3001\u4efb\u610f\u5927\u6574\u6570\uff08BigInt\uff09\u3001\u5bf9\u8c61\uff08Object\uff09\uff0c\u5bf9\u8c61\u4e2d\u6709\u5404\u79cd\u6bd4\u8f83\u5e38\u7528\u7684\u6570\u636e\uff0c\u5982\u51fd\u6570\u3001\u6570\u7ec4\u7b49<\/p>\n

\u53d8\u91cf\u58f0\u660e<\/h4>\n
    \n
  1. \n

    ES5<\/code>\uff0cvar<\/code>\u53d8\u91cf\u548c\u51fd\u6570\u4f1a\u63d0\u5347<\/p>\n

      \n
    1. \n

      \u51fd\u6570\u53d8\u91cf\u63d0\u5347\u5230\u4f5c\u7528\u57df\u6700\u524d\u9762<\/p>\n<\/li>\n

    2. \n
      console.log(a); \/\/ \u4e0d\u4f1a\u62a5\u9519\uff0c\u4f46\u662f\u503c\u4e3a\uff1aundefined\nb(); \/\/ \u6b63\u5e38\u8c03\u7528\nvar a = 1;\nfunction b(){\nconsole.log(1);\n}<\/code><\/pre>\n<\/li>\n
    3. \n
      \u58f0\u660e\u53d8\u91cf\u4e00\u5b9a\u4e0d\u8981\u6f0f\u6389var<\/code><\/p>\n<\/li>\n
    4. \n
      c = 1; \/\/ \u4e0d\u5141\u8bb8\u4e0d\u58f0\u660e\u76f4\u63a5\u7528\uff0c\u4f1a\u53d8\u6210\u5168\u5c40\u53d8\u91cf\uff0cvar\u5fc5\u987b<\/code><\/pre>\n<\/li>\n<\/ol>\n<\/li>\n
    5. \n
      \u53ea\u8981\u662f\u652f\u6301ES6<\/code>\u8bed\u6cd5\u7684\uff0c\u7528const<\/code>\uff0c\u975e\u5fc5\u8981\u4e0d\u7528let<\/code>\uff0cESLint<\/code>\u53ef\u4ee5\u5e2e\u52a9\u4f18\u5316<\/p>\n
        \n
      1. \n
        const a = 1; \/\/ \u770b\u5230\u662fconst\u53d8\u91cf\u5c31\u77e5\u9053\u540e\u9762\u4e0d\u4f1a\u88ab\u66f4\u6539\uff0c\u662f\u5bf9\u8c61\u6216\u8005\u6570\u7ec4\u9700\u8981\u6ce8\u610f\uff0c\u5982\u679c\u5bf9\u8c61\u548c\u6570\u7ec4\u4e0d\u80fd\u6539\uff1aObject.freeze()\nlet b = 1;\nb = 2;<\/code><\/pre>\n<\/li>\n
      2. \n
        \u51fd\u6570\u58f0\u660e\uff0c\u4e0b\u9762\u51e0\u79cd\u90fd\u53ef\u4ee5\uff0c\u4e0d\u8fc7\u6709\u7ec6\u5fae\u533a\u522b<\/p>\n<\/li>\n
      3. \n
        function a(){} \/\/ \u51fd\u6570\u58f0\u660e\uff0c\u4f1a\u63d0\u5347\u5230\u4f5c\u7528\u57df\u6700\u524d\u9762\uff0c\u53ef\u4ee5\u63d0\u524d\u8c03\u7528\nvar b = function(){} \/\/ \u58f0\u660e\u53d8\u91cf\uff0c\u7136\u540e\u8d4b\u503c\u4e00\u4e2a\u533f\u540d\u51fd\u6570\uff0cb\u4f1a\u63d0\u5347\uff0c\u53d8\u91cf\u53ef\u4ee5\u4f7f\u7528\uff0c\u4f46\u662f\u662fundefined\uff0c\u4e0d\u80fd\u63d0\u524d\u8c03\u7528\nconst c = () => {} \/\/ ES6\u7bad\u5934\u51fd\u6570\uff0c\u4e0d\u4f1a\u63d0\u5347\uff0c\u4e0d\u80fd\u63d0\u524d\u4f7f\u7528\u53d8\u91cf\u548c\u8c03\u7528\nconst d = function(){} \/\/ \u548c\u524d\u4e00\u4e2a\u6709\u7ec6\u5fae\u533a\u522b\uff0c\u4e3b\u8981\u662f\u51fd\u6570\u548c\u7bad\u5934\u51fd\u6570\u7684\u533a\u522b\uff0c\u540e\u9762\u4f1a\u63d0\u5230 <\/code><\/pre>\n<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n
        \u6ce8\u610f\uff1a\u65b0\u9879\u76ee\u5e94\u8be5\u90fd\u6dd8\u6c70var\u4e86\uff0c\u4e0d\u8981\u518d\u4f7f\u7528var\uff0c\u5bb9\u6613\u5f15\u8d77\u5404\u79cd\u95ee\u9898\u3002<\/strong><\/p>\n
        \u53d8\u91cf\u4f5c\u7528\u57df<\/h4>\n
          \n
        1. \n
          ES6<\/code>\u4e4b\u524d\u53d8\u91cf\u4f5c\u7528\u57df\uff0c\u53ea\u6709\u51fd\u6570\u624d\u6709\u81ea\u5df1\u7684\u4f5c\u7528\u57df<\/p>\n
            \n
          1. \n
            for(var i=0;i<10;i++){\n  \/\/ \u6267\u884c\u903b\u8f91\n}\nconsole.log(i) \/\/ \u8f93\u51fa10\n\n(function(){\n  var k = 1;\n})() \/\/ \u7acb\u5373\u6267\u884c\u51fd\u6570\u5305\u88f9\u4e4b\u540e\u4e0d\u4f1a\u6709\u53d8\u91cf\u9003\u51fa\u4f5c\u7528\u57df\nconsole.log(k) \/\/ \u62a5\u9519<\/code><\/pre>\n<\/li>\n<\/ol>\n<\/li>\n
          2. \n
            ES6<\/code>\u4e2d\u4ee3\u7801\u5757\u5c31\u6709\u81ea\u5df1\u7684\u4f5c\u7528\u57df<\/p>\n
              \n
            1. \n
              for(let j=0;j<10;j++){\n  \/\/ \u6267\u884c\u903b\u8f91\n}\nconsole.log(j) \/\/ \u62a5\u9519\uff0cj\u4e0d\u5b58\u5728<\/code><\/pre>\n<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n
              ES6\u89e3\u51b3\u4e86\u5f88\u591a\u4ee5\u524d\u5fc5\u987b\u7528\u95ed\u5305\u624d\u80fd\u89e3\u51b3\u7684JS\u95ee\u9898\u3002<\/strong><\/p>\n
              \u6570\u636e\u57fa\u7840<\/h3>\n
              JS<\/code>\u4e2d\u7ecf\u5e38\u9700\u8981\u505a\u6570\u636e\u6bd4\u8f83\uff0c\u6bd4\u8f83\u662f\u5426\u76f8\u7b49\uff0c\u5224\u65ad\u6570\u636e\u662f\u5426\u4e3a\u7a7a\uff0c\u5982\u679c\u4e3a\u7a7a\u4e0d\u80fd\u7ee7\u7eed\u652f\u6301\u67d0\u4e9b\u64cd\u4f5c\uff0c\u5426\u5219\u53ef\u80fd\u62a5\u9519<\/p>\n
              \u76f8\u7b49\u5224\u65ad<\/h4>\n
              a === b \/\/ \u5224\u65ad\u7c7b\u578b\na == b \/\/ \u4e0d\u5224\u65ad\u7c7b\u578b\uff0c1 == '1'\nNaN !== NaN \/\/ \u9700\u8981\u7528isNaN()\u65b9\u6cd5\u5224\u65ad<\/code><\/pre>\n
              \u6ce8\u610f\uff1a\u65b0\u9879\u76ee\u4e00\u5b9a\u4e0d\u8981\u7528==<\/code>\uff0c\u5f00\u542fESlint\u53ef\u4ee5\u5e2e\u5fd9\u9a8c\u8bc1<\/strong><\/p>\n
              \u7a7a\u6570\u636e<\/h4>\n
              JS\u4e2d\u5e38\u89c1\u7684\u7a7a\u6570\u636e\uff1a<\/p>\n
              undefined\nnull\n0 \/\/ \u5b57\u7b26\u4e32'0'\u4e0d\u4e3a\u7a7a\nfalse\nNaN\n''<\/code><\/pre>\n
              \u6ce8\u610fJS<\/code>\u4e2d{}<\/code>\u548c[]<\/code>\u4e0d\u662f\u7a7a\uff0c\u8fd9\u79cd\u5bf9\u8c61\u5b57\u9762\u91cf<\/strong>\u662f\u76f8\u5f53\u4e8e\u7528new<\/code>\u6784\u9020\u51fa\u6765\uff0c\u4e5f\u4e0d\u76f8\u7b49\uff1a{}!=={}<\/code><\/p>\n
              \u5224\u7a7a\u4ee3\u7801<\/p>\n
              const a = ''\nif(!a){ \/\/ \u4e0d\u8981\u7528a===''\u4e4b\u7c7b\u7684\u5224\u65ad\n    console.log('a\u4e3a\u7a7a\uff1aa=', a) \n}\nif(a){\n    console.log('\u6709\u503c\uff1aa=', a) \n}<\/code><\/pre>\n
              \u5982\u679c\u662f\u7b80\u5355\u4ee3\u7801\u4e00\u884c\u4ee3\u7801\uff0c\u53ef\u4ee5\u7528&&<\/code>\u65b9\u6cd5<\/p>\n
              const a = '';\na && console.log('\u6267\u884c\u64cd\u4f5c'); \/\/ \u4e0d\u4f1a\u6267\u884c\u540e\u9762\u7684\u4ee3\u7801: console.log('\u6267\u884c\u64cd\u4f5c')<\/code><\/pre>\n
              \u6700\u65b0\u94fe\u5f0f\u64cd\u4f5c\uff0c\u4f7f\u7528\u95ee\u53f7\u70b9?.<\/code>\u64cd\u4f5c\u7b26\u53ef\u4ee5\u51cf\u5c11\u5927\u91cf\u7684\u5224\u65ad:<\/p>\n
              const a = null \/\/ \u5047\u8bbea\u662f\u6570\u7ec4\uff0c\u7c7b\u4f3c\u8fd9\u79cd\u7ed3\u6784\uff1a[{name: 'gary'}]\n\/\/ const a = [{name: 'gary'}]\nlet b\nif(a && a[0]){\n    b = a[0].name \/\/ \u5e38\u89c4\u83b7\u53d6name\u5c5e\u6027\n}\nlet c = a && a[0] && a[0].name \/\/ \u9a9a\u64cd\u4f5c\u83b7\u53d6name\nlet d = a?.[0]?.name \/\/ \u6700\u65b0\u94fe\u5f0f\u64cd\u4f5c<\/code><\/pre>\n
              ||\u548c&&<\/h4>\n
              \u8fd9\u4e24\u4e2a\u7ecf\u5e38\u5728\u5224\u65ad\u8bed\u53e5\u4e2d\u51fa\u73b0\uff0c\u5176\u5b9e\u8fd9\u4e2a\u8868\u8fbe\u5f0f\u5e76\u4e0d\u4f1a\u8fd4\u56deBoolean<\/code>\u503c\uff0c\u8fd4\u56de\u7684\u662f\u5b9e\u9645\u7684\u6570\u636e<\/p>\n
              const a = 0 || 1\nconsole.log(a) \/\/ 1\nconst b = 'abc' && 'def'\nconsole.log(b) \/\/ 'def'<\/code><\/pre>\n
              \u5b57\u7b26\u4e32\u62fc\u63a5<\/h4>\n
              ES6\u4e4b\u524d\u5b57\u7b26\u4e32\u62fc\u63a5\u4e00\u822c\u90fd\u662f\u7528\u52a0\u53f7\uff0c\u800c\u4e14\u4e0d\u652f\u6301\u591a\u884c<\/p>\n
              const a = 'a'\nconst b = a + '\\n' + 'b'<\/code><\/pre>\n
              ES6<\/code>\u6709\u65b0\u7684\u6a21\u677f\u5b57\u7b26\u4e32\u8bed\u6cd5\uff0c\u652f\u6301\u53d8\u91cf\uff0c\u800c\u4e14\u53ef\u4ee5\u6362\u884c\uff0c\u7279\u522b\u6bd4\u8f83\u65b9\u4fbf\u4f7f\u7528\uff0c\u5c24\u5176\u662f\u62fc\u63a5\u52a8\u6001HTML<\/code><\/p>\n
              const a = 'a'\nconst b = `<span class="test">\n${a}\n<\/span>`<\/code><\/pre>\n
              \u7b80\u5355\u7c7b\u578b\u8f6c\u6362<\/h4>\n
              const a = '1'\nconst b = +a \/\/ \u8f6c\u6210\u6570\u5b57, parseInt\u548cparseFloat\u4e5f\u53ef\u4ee5\uff0c\u4e0d\u8fc7\u6ca1\u6709+\u7b80\u6d01\u65b9\u4fbf\nconst c = !!a \/\/ \u8f6c\u6210Boolean\n\nconst d = 1\nconst e = ''+d \/\/ \u8f6c\u5b57\u7b26\u4e32\nconst f = `${d}` \/\/ \u65b0\u6a21\u677f\u5b57\u7b26\u4e32<\/code><\/pre>\n
              \u6b63\u5219\u8868\u8fbe\u5f0f<\/h4>\n
              \u53c2\u8003\uff1ahttps:\/\/www.runoob.com\/jsref\/jsref-obj-regexp.html<\/a><\/p>\n
              \u6b63\u5219\u8868\u8fbe\u5f0f\u662f\u72ec\u7acb\u4e8eJS\u8bed\u8a00\u7684<\/p>\n
              const re1 = new RegExp("\\\\w+"); \/\/ new\u65b9\u5f0f\u65b0\u5efa\nconst re2 = \/\\w+\/; \/\/ \u5b57\u9762\u91cf\u5f62\u5f0f\u65b0\u5efa\nconst cardNo = '5122322139920319'\nconst cardConfusion = cardNo.replace(\/^(\\d{6}).*(\\d{4})\/, '$1******$2') \/\/ 512232******0319 \u5206\u7ec4\u66ff\u6362<\/code><\/pre>\n
              \u9ed8\u8ba4\u503c<\/h3>\n
              \u7ecf\u5e38\u5728\u5f00\u53d1\u4e2d\u7528\u5230\u5982\u679c\u6ca1\u6709\u6570\u636e\u5c31\u7ed9\u4e00\u4e2a\u9ed8\u8ba4\u6570\u636e\u7684\u60c5\u51b5\uff0c\u5e38\u89c4\u7528\u6cd5\u662f\u7528if<\/code>\u8bed\u53e5<\/p>\n
              let a = ''\nif(!a){\n    a = '\u9ed8\u8ba4\u503c'\n}<\/code><\/pre>\n
              \u4ee3\u7801\u76f8\u5bf9\u6765\u8bb2\u6bd4\u8f83\u7e41\u7410\uff0c\u6709\u4e00\u4e9b\u6bd4\u8f83\u65b9\u4fbf\u7684\u65b9\u6cd5\u3002<\/p>\n
              \u51fd\u6570\u9ed8\u8ba4\u503c<\/h4>\n
              \u5982\u679c\u9ed8\u8ba4\u503c\u662f\u4f20\u9012\u7ed9\u51fd\u6570\uff0cES6<\/code>\u51fd\u6570\u652f\u6301\u9ed8\u8ba4\u503c\uff0c\u9ed8\u8ba4\u503c\u53c2\u6570\u53ef\u4ee5\u5728\u4e2d\u95f4\uff1a<\/p>\n
              function a(config={}){\n}\nfunction b(b1, b2=2, b3){\n}\nb(1) \/\/ b1=1, b2=2\nb(1,3) \/\/ b1=1\uff0cb2=3 \u51fd\u6570\u4f20\u53c2\u4e0d\u80fd\u8df3\u8dc3\nb(1,3,4) \/\/ b1=1\uff0cb2=3\uff0cb3=4<\/code><\/pre>\n
              \u4ee3\u7801\u4e2d\u9ed8\u8ba4\u503c<\/h4>\n
              \u9664\u4e86\u51fd\u6570\u9ed8\u8ba4\u503c\u4e4b\u5916\uff0c\u5e73\u65f6\u4ee3\u7801\u5185\u90e8\u4e5f\u53ef\u80fd\u7528\u5230\u9ed8\u8ba4\u503c<\/p>\n
              config = config || '\u9ed8\u8ba4\u503c' \/\/ \u6700\u5e38\u7528\u9ed8\u8ba4\u503c\u4f7f\u7528\u65b9\u6cd5\nconfig = config ?? '\u9ed8\u8ba4\u503c' \/\/ \u6bd4\u8f83\u65b0\u7684\u8bed\u6cd5\uff0c\u8001\u7684\u73af\u5883\u53ef\u80fd\u4e0d\u652f\u6301\uff0c\u548c\u4e0a\u9762\u533a\u522b\u5728\u4e8e\u53ea\u8981\u6709\u503c\uff08\u975eundefined\u548cnull\uff09\u5c31\u4e0d\u4f1a\u7528\u9ed8\u8ba4\u503c<\/code><\/pre>\n
              \u51fd\u6570\u4e0e\u7bad\u5934\u51fd\u6570<\/h3>\n
              \u7bad\u5934\u51fd\u6570\u548c\u51fd\u6570\u57fa\u672c\u53ef\u4ee5\u76f8\u4e92\u66ff\u4ee3\uff0c\u4f46\u662f\u8fd8\u662f\u6709\u4e0d\u5c11\u533a\u522b<\/p>\n
                \n
              1. \n
                \u7bad\u5934\u51fd\u6570\u6ca1\u6709this<\/code>\uff0c\u4e14\u4e0d\u80fd\u7ed1\u5b9athis<\/code>\uff0c<\/p>\n
                  \n
                1. \n
                  \u5728vue<\/code>\u7684methods<\/code>\u58f0\u660e\u65b9\u6cd5\u7684\u65f6\u5019\u5982\u679c\u8981\u7528this<\/code>\u8bbf\u95eevue<\/code>\u5b9e\u4f8b\u6570\u636e\u5c31\u4e0d\u80fd\u7528\u7bad\u5934\u51fd\u6570\u3002<\/p>\n<\/li>\n
                2. \n
                  \u56e0\u4e3a\u6ca1\u6709this<\/code>\uff0c\u4ee5\u524d\u7684apply<\/code>\u6216call<\/code>\u6539\u53d8this<\/code>\u6307\u5411\u7684\u65b9\u6cd5\u90fd\u6ca1\u6709\u7528\u5904\u3002<\/p>\n<\/li>\n
                3. \n
                  const a = {\n  b(){\n      console.log(this) \n  },\n  c:()=>{\n      console.log(this) \n  }\n}\na.b() \/\/ a\u5bf9\u8c61\na.c() \/\/ \u5168\u5c40window\u5bf9\u8c61\nconst a1 = {}\na.b.call(a1) \/\/ a1\u5bf9\u8c61\na.c.call(a1) \/\/ \u5168\u5c40window\u5bf9\u8c61<\/code><\/pre>\n<\/li>\n<\/ol>\n<\/li>\n
                4. \n
                  \u7bad\u5934\u51fd\u6570\u6ca1\u6709arguments<\/code><\/p>\n
                    \n
                  1. \n
                    \u666e\u901a\u51fd\u6570\u53ef\u4ee5\u7528arguments<\/code>\u805a\u5408\u53c2\u6570\uff0carguments<\/code>\u662f\u4f2a\u6570\u7ec4\uff0c\u5df2\u7ecf\u4e0d\u63a8\u8350\u4f7f\u7528\u4e86<\/p>\n<\/li>\n
                  2. \n
                    ES6<\/code>\u73af\u5883\u4e0b\u53ef\u4ee5\u7528\u5269\u4f59\u53c2\u6570<\/code>\u4ee3\u66ff\uff0c\u5269\u4f59\u53c2\u6570\u652f\u6301\u666e\u901a\u51fd\u6570\u548c\u7bad\u5934\u51fd\u6570<\/p>\n<\/li>\n
                  3. \n
                    function(a, b, ...args) { \/\/ \u5269\u4f59\u53c2\u6570\u662f\u6570\u7ec4\uff0c\u53ea\u80fd\u5728\u6700\u540e\u4e00\u4e2a\u53c2\u6570\u4f4d\u7f6e\nconsole.log(args)\n}<\/code><\/pre>\n<\/li>\n<\/ol>\n<\/li>\n
                  4. \n
                    \u7bad\u5934\u51fd\u6570\u6ca1\u6709\u539f\u578b<\/p>\n
                      \n
                    1. \n
                      \u666e\u901a\u51fd\u6570\u5b9e\u9645\u4e0a\u662f\u53ef\u4ee5\u4f5c\u4e3a\u6784\u9020\u51fd\u6570\u751f\u6210\u5bf9\u8c61\uff0c\u53ef\u4ee5\u4f5c\u4e3a\u7c7b\u4f7f\u7528\uff0c\u4e0d\u662f\u5f88\u7eaf\u7cb9\u7684\u51fd\u6570<\/p>\n<\/li>\n
                    2. \n
                      \u7bad\u5934\u51fd\u6570\u662f\u7eaf\u7cb9\u7684\u51fd\u6570\uff0c\u6ca1\u6709\u539f\u578bprototype<\/code>\uff0c\u4e0d\u80fd\u7ed9prototype<\/code>\u589e\u52a0\u4fe1\u606f<\/p>\n<\/li>\n
                    3. \n
                      function A(){}\nconsole.log(A.prototype) \/\/ {}\nconsole.log(new A()) \/\/ A{}\n\nconst B = () => {}\nconsole.log(B.prototype) \/\/ undefined\nconsole.log(new B()) \/\/ \u62a5\u9519 Uncaught TypeError: B is not a constructor<\/code><\/pre>\n<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n
                      \u63a8\u8350\u4f7f\u7528\u7bad\u5934\u51fd\u6570\uff0c\u5c24\u5176\u662f\u5728\u4f5c\u4e3a\u56de\u8c03\u51fd\u6570\u7684\u65f6\u5019\uff0c\u5982promise.then<\/code>\uff0carray.filter<\/code>\uff0carray.map<\/code>\uff0c\u548cvue\u7ed3\u5408\u7684\u65f6\u5019\u7bad\u5934\u51fd\u6570\u4e0d\u4f1a\u5f15\u8d77this\u6307\u5411\u9519\u8bef<\/strong><\/p>\n
                      \u5bf9\u8c61\u548c\u6570\u7ec4<\/h3>\n
                      \u5bf9\u8c61\u548c\u6570\u7ec4\u662fJS<\/code>\u4e2d\u4f7f\u7528\u6700\u9891\u7e41\u7684\u6570\u636e\uff0c\u5c31\u662f\u57fa\u672c\u6570\u636e\u7c7b\u578b\u7684\u7ec4\u5408\u5f62\u5f0f<\/p>\n
                      \u7b80\u5355\u904d\u5386<\/h4>\n
                      \u904d\u5386\u6570\u7ec4<\/p>\n
                      const arr = [1,2,3,4]\nfor(let i=0;i<arr.length;i++){\n    console.log(arr[i])\n}\nfor(const item of arr){\n    console.log(item)\n}\narr.forEach(item => console.log(item))<\/code><\/pre>\n
                      \u904d\u5386\u5bf9\u8c61<\/p>\n
                      const obj = {a:1,b:2,c:3}\nfor(const key in obj){\n    console.log(`${key}: ${obj[key]}`)\n}\nfor(const key of Object.keys(obj)){\n    console.log(`${key}: ${obj[key]}`)\n}\nfor(const [key,value] of Object.entries(obj)){\n    console.log(`${key}: ${value}`)\n}<\/code><\/pre>\n
                      \u5bf9\u8c61\u5408\u5e76<\/h4>\n
                      \u5982\u679c\u662f\u7b80\u5355\u7684\u5bf9\u8c61\u5408\u5e76\uff0c\u5408\u5e76\u540e\u5bf9\u8c61\u65f6\u539f\u59cb\u5bf9\u8c61\u7684\u6d45\u5c42\u62f7\u8d1d\uff0c\u65b9\u6cd5\u6bd4\u8f83\u591a<\/p>\n
                      \u5c55\u5f00\u8fd0\u7b97<\/h5>\n
                      ES6\u4e2d\u652f\u6301\u5c55\u5f00\u8fd0\u7b97\uff0c\u5f88\u65b9\u4fbf\u6784\u9020\u65b0\u7684\u5bf9\u8c61<\/p>\n
                         const a = {a:1,b:2}\n   const b = {b:3}\n   const c = {...a, ...b, a: 3} \/\/ \u540e\u9762\u7684\u8986\u76d6\u524d\u9762\u7684\u5c5e\u6027\uff0c\u4ea7\u751f\u65b0\u5bf9\u8c61<\/code><\/pre>\n
                      Object\u65b9\u6cd5<\/h5>\n
                      \u7528Object.assign<\/code>\u53ef\u4ee5\u5b9e\u73b0\u76f8\u540c\u7684\u529f\u80fd\uff0c\u4e0d\u8fc7\u4ee3\u7801\u6bd4\u8f83\u7e41\u7410\uff0c\u9002\u5408\u76f4\u63a5\u4fee\u6539\u5bf9\u8c61\u5185\u5bb9<\/p>\n
                         const a = {a:1,b:2}\n   const b = {b:3}\n   const c = Object.assign({}, a, b, {a:3}) \/\/ \u540e\u9762\u7684\u8986\u76d6\u524d\u9762\u7684\u5c5e\u6027<\/code><\/pre>\n
                      \u5bf9\u8c61\u64cd\u4f5c<\/h4>\n
                      \u5bf9\u8c61\u64cd\u4f5c\u65b9\u6cd5\u5f88\u591a\uff0c\u8fd9\u91cc\u4f7f\u7528\u4e00\u4e9b\u5e38\u7528\u65b9\u6cd5<\/p>\n
                      const a = {} \/\/ \u65b0\u5efa\u5bf9\u8c61\uff0c\u4e00\u822c\u7528\u8fd9\u79cd\u5b57\u9762\u91cf\u65b9\u5f0f\uff0c\u4e0d\u7528new Object()\uff0c\u8bed\u6cd5\u7b80\u6d01\nconst b = 'name'\nconst c = {\n    a: a,\n    b,\n    [b]: '\u6d4b\u8bd5\u540d\u5b57'\n}\n\/\/ \u5e38\u7528\u65b9\u6cd5\nconst d = Object.assign({}, c)\nObject.freeze(d) \/\/ \u51bb\u7ed3\u5bf9\u8c61\uff0c\u4efb\u4f55\u6570\u636e\u4fee\u6539\u4e0d\u80fd\u751f\u6548\nObject.hasOwn(c, 'name') \/\/ \u662f\u5426\u5b58\u5728\u5c5e\u6027\u5224\u65ad\uff0c\u4ee3\u66ffc.hasOwnProperty('name')\nObject.fromEntries([['a', '1'], ['b', '2']]) \/\/ \u6570\u7ec4\u8f6c\u5bf9\u8c61\nObject.entries(d) \/\/ \u5bf9\u8c61\u8f6c\u6570\u7ec4\n\n\/\/====================================================\nconst arr = [{id:1, name: 'n1'}, {id:2, name: 'n2'}]\nconst obj1 = Object.fromEntries(arr.map(item=>[item.id, item])) \/\/ \u5e38\u89c1\u7684\u6570\u636e\u6570\u7ec4\u8f6c\u6210\u5bf9\u8c61\u683c\u5f0f\nconst obj2 = arr.reduce((res, item) => {\n    res[item.id] = item\n    return res\n}, {}) \/\/ \u5e38\u89c1\u7684\u6570\u636e\u6570\u7ec4\u8f6c\u6210\u5bf9\u8c61\u683c\u5f0f\n\/\/ ===================================================\nObject.defineProperty(obj2, 'name', {}) \/\/ \u5b9a\u4e49\u53d8\u91cf\u63cf\u8ff0\u7b26\uff0c\u91cd\u8981\uff0cvue2\u54cd\u5e94\u5f0f\u539f\u7406<\/code><\/pre>\n
                      \u6570\u7ec4\u64cd\u4f5c<\/h4>\n
                      JS<\/code>\u4e2d\u9664\u4e86\u5bf9\u8c61\u5c31\u662f\u6570\u7ec4\uff0c\u6570\u7ec4\u64cd\u4f5c\u5f88\u591a\uff0c\u5c24\u5176\u662fES6<\/code>\u4e4b\u540e\uff0c\u589e\u52a0\u4e86\u5927\u91cf\u7684\u65b9\u6cd5<\/p>\n
                      \u53c2\u8003\uff1ahttps:\/\/www.runoob.com\/jsref\/jsref-obj-array.html<\/a><\/p>\n
                      const arr = [1,2,5,3,4,1,3]\nconst arr1 = arr.concat([3,4,4]) \/\/ \u6570\u7ec4\u5408\u5e76\uff0c\u4e0d\u6539\u53d8\u6e90arr\nconst arr11 = [...arr, 3,4,4] \/\/ \u6570\u7ec4\u5408\u5e76\uff0c\u4e0d\u6539\u53d8\u6e90arr\nconst h = Math.max(...arr) \/\/ \u5c55\u5f00\u4f20\u53c2\narr.push(1) \/\/ \u540e\u9762\u589e\u52a0\narr.pop() \/\/ \u540e\u9762\u5f39\u51fa\u4e00\u4e2a\uff0c\u8fd4\u56de\u5f39\u51fa\u7684\u503c\narr.unshift(1) \/\/ \u524d\u9762\u589e\u52a0\narr.shift() \/\/ \u524d\u9762\u5220\u9664\narr.join(',') \/\/ \u8f6c\u6210\u5b57\u7b26\u4e32\uff0c\u5f88\u6709\u7528\narr.slice(1, 3) \/\/ \u6570\u7ec4\u6309\u7167\u5e8f\u53f7\u622a\u53d6[start,end) \narr.splice(1, 1) \/\/ \u4ece\u6307\u5b9a\u7684index\u5220\u9664n\u4e2a\u6570\u636e\nconst arr2 = arr.map(item => item * 2) \/\/ \u6620\u5c04\nconst arr3 = arr.filter(item => item<4) \/\/ \u8fc7\u6ee4\nconst item1 = arr.find(item => item<4) \/\/ \u67e5\u627e\u7b2c\u4e00\u4e2a\nconst itemIndex = arr.findIndex(item=> item===5) \/\/ \u67e5\u8be2\u5e8f\u53f7\n\n\/\/ ===========\u53bb\u91cd=========\nconst arr4 = [...new Set(arr)] \/\/ \u6700\u7b80\u5355\u53bb\u91cd\uff0c\u4e0d\u8fc7\u5982\u679c\u662f\u5224\u65ad\u5bf9\u8c61\u5185\u90e8\u5c5e\u6027\u53bb\u91cd\u5c31\u4e0d\u80fd\u4f7f\u7528\u4e86\nconst arr5 = arr.reduce((res, item) => {\n    !res.includes(item) && res.push(item)\n    return res\n}, []) \/\/ \u7528reduce\u51fd\u6570\u53bb\u91cd\u53ef\u4ee5\u81ea\u5b9a\u4e49\u89c4\u5219\narr.fill(0) \/\/ arr\u5168\u90e8\u8d4b\u503c\u6210\u6307\u5b9a\u7684\u503c\n\n\/\/ \u4f2a\u6570\u7ec4\u8f6c\u6362\u6570\u7ec4\nconst arr6 = Array.prototype.slice.call(arguments, 0)\nconst arr7 = Array.from(arguments)\nconst arr8 = [...arguments]<\/code><\/pre>\n
                      \u5bf9\u8c61\u6df1\u62f7\u8d1d<\/h4>\n
                      \u524d\u9762\u4f7f\u7528\u7684\u5c55\u5f00\u8fd0\u7b97\u7b26\u6216\u8005Object.assign<\/code>\u90fd\u662f\u6d45\u62f7\u8d1d<\/p>\n
                      \u5982\u679c\u8981\u5b9e\u73b0\u6df1\u5c42\u62f7\u8d1d\uff0c\u9700\u8981\u81ea\u5df1\u5b9e\u73b0\u6216\u8005\u7528\u7b2c\u4e09\u65b9\u5e93\uff0c\u6bd4\u5982lodash<\/code>\u7684cloneDeep<\/code>\uff0c\u4e00\u822c\u90fd\u662f\u9012\u5f52\u590d\u5236\u5bf9\u8c61\uff0c\u7b80\u5355\u9879\u76ee\u4e0d\u60f3\u5f15\u5165\u7b2c\u4e09\u65b9\u5e93\uff0c\u4e5f\u53ef\u4ee5\u7528JSON<\/code>\uff0c\u4e0d\u8fc7\u9700\u8981\u6ce8\u610fJSON<\/code>\u4e0d\u652f\u6301\u5d4c\u5957\u5bf9\u8c61\u4e92\u76f8\u5f15\u7528\u3002<\/p>\n
                         const a = {a:1,b:{c:2}}\n   function simpleClone(obj){\n       return JSON.parse(JSON.stringify(obj))\n   }\n   const d = simpleClone(a) \/\/ \u6df1\u62f7\u8d1d\n   console.log(a.b===d.b) \/\/ false\n   const e = {...a} \/\/ \u6d45\u62f7\u8d1d\n   console.log(a.b===e.b) \/\/ true<\/code><\/pre>\n
                      \u89e3\u6784\u8d4b\u503c<\/h4>\n
                      ES6\u4e2d\u6709\u4e2a\u5f88\u91cd\u8981\u7684\u6539\u53d8\uff0c\u5c31\u662f\u7ed3\u6784\u8d4b\u503c\uff0c\u76f8\u5f53\u65b9\u4fbf<\/p>\n
                      \/\/ \u5bf9\u8c61\u7ed3\u6784\nconst a = {b:1, c:2, d:3}\nconst {b,c} = a \/\/ \u4ecea\u4e2d\u7ed3\u6784\u51fab\u548cc\nconst {d: d1} = a \/\/ \u4ecea\u4e2d\u7ed3\u6784\u51fad\u5e76\u4fee\u6539\u540d\u4e3ad1\uff0c\u4e3b\u8981\u662f\u5728\u7ed3\u6784\u540e\u91cd\u540d\u7684\u60c5\u51b5\u4e0b\u4f7f\u7528\n\/\/ \u6570\u7ec4\u7ed3\u6784\nconst f = [1, 2, 3, 4]\nconst [g, h] = f \/\/ \u89e3\u6784f\u6570\u7ec4\u76840\u548c1\u4f4d\u7f6e\u6570\u636e\u7ed9g\u548ch\nlet i = 1\nlet j = 2\n\/\/ [i, j] = [j, i]  \/\/ \u89e3\u6784\u4ea4\u6362\u4e24\u4e2a\u53d8\u91cf\u7684\u503c\nfunction h(config){\n    console.log(config.i, config.j)\n}\nh({i, j}) \/\/ \u89e3\u6784\u4f20\u53c2\n\nfunction h1({i, j}){ \/\/ \u53c2\u6570\u76f4\u63a5\u89e3\u6784\n    console.log(i, j)\n}\nh1({i, j}) \/\/ \u89e3\u6784\u4f20\u53c2<\/code><\/pre>\n
                      \u6ce8\u610f\uff1a\u5982\u679c\u662fVue<\/code>\u54cd\u5e94\u5f0f\u6570\u636e\u8981\u89e3\u6784\u8981\u8c28\u614e\uff0c\u89e3\u6784\u540e\u53ef\u80fd\u4e0d\u54cd\u5e94<\/strong><\/p>\n
                      Vue<\/code>\u89e3\u6784\u95ee\u9898\uff1ahttps:\/\/cn.vuejs.org\/guide\/essentials\/reactivity-fundamentals.html#limitations-of-reactive<\/a><\/p>\n
                      \u7f51\u9875\u5b9a\u65f6<\/h3>\n
                      \u7f51\u9875\u5b9a\u65f6\u5e38\u7528\u7684\u5c31\u662fsetInterval()<\/code>\u548csetTimeout()<\/code><\/p>\n
                      const handler1 = () => {\n    console.log('setInterval')\n}\nconst handler2 = () => {\n    console.log('setTimeout')\n    timer2=setTimeout(handler2, 1000)\n}\nconst timer1 = setInterval(handler1, 1000)\nlet timer2 = setTimeout(handler2, 1000)\nsetTimeout(handler2) \/\/ \u52a0\u5165\u5ef6\u65f6\u961f\u5217\uff0c\u5f02\u6b65\u6267\u884c\nPromise.resolve().then(handler2) \/\/ \u52a0\u5165\u5fae\u961f\u5217\uff0c\u5f02\u6b65\u6267\u884c\uff0cVue\u7684nextTick<\/code><\/pre>\n
                      \u6ce8\u610f\uff1a\u5b9a\u65f6\u5668\u4e00\u822c\u8981\u5728\u9500\u6bc1\u7684\u65f6\u5019\u6e05\u7406\u6389\uff0c\u5c24\u5176\u662f\u5355\u9875\u5e94\u7528\u8981\u6ce8\u610f\u6e05\u7406\u5b9a\u65f6\u5668<\/strong><\/p>\n
                      Promise<\/h3>\n
                      Promise<\/code>\u662f\u65b0\u7684\u4e00\u6b65\u51fd\u6570\u5904\u7406\u6a21\u5f0f\uff0cES6<\/code>\u4e4b\u524d\u4e5f\u6709Promise A+<\/code>\u89c4\u8303\uff0c\u6709\u4e0d\u5c11\u7b2c\u4e09\u65b9\u5b9e\u73b0\uff0c\u6bd4\u5982jQuery<\/code>\u4e5f\u6709\u81ea\u5df1\u7684\u5b9e\u73b0\u3002<\/p>\n
                      Promise\u5b9e\u4f8b<\/h4>\n
                      Promise<\/code>\u662f\u4e00\u4e2a\u5bf9\u8c61\uff0c\u6709\u4e00\u4e2athen<\/code>\u65b9\u6cd5\uff0c\u57fa\u672c\u5c31\u53ef\u4ee5\u8ba4\u4e3a\u662f\u4e00\u4e2aPromise<\/code>\u5bf9\u8c61\u4e86\uff0c\u652f\u6301async\u548cawait<\/code>\u4e86<\/p>\n
                      \/\/ \u65b0\u5efaPromise\uff0cthen\u6216catch\u7b49\u90fd\u8fd4\u56de\u4e00\u4e2a\u65b0\u7684Promise\u5bf9\u8c61\nnew Promise((resolve, reject) => {\n  setTimeout(() => {\n    resolve(1);\n  }, 1000);\n})\n  .then((data) => {\n    console.log("then1", data);\n    return 2;\n  })\n  .then((data) => {\n    console.log("then2", data);\n    return Promise.resolve(3);\n  })\n  .then((data) => {\n    console.log("then3", data);\n  })\n  .then((data) => {\n    console.log("then4", data);\n  });\n\/\/ promise.then\u65b9\u6cd5\u6709\u4e24\u4e2a\u53c2\u6570\u4e00\u4e2a\u8868\u793a\u6210\u529f\uff0c\u4e00\u4e2a\u8868\u793a\u5931\u8d25\npromise.then(successFunc, failFunc)\n\/\/ \u7b49\u4ef7\u4e8e\npromise.then(successFun) \/\/ \u6210\u529f\n    .catch(failFunc) \/\/ \u5931\u8d25\n    .finally((err) => console.log("finally", err)); \/\/ \u65e0\u8bba\u6210\u529f\u6216\u5931\u8d25\u90fd\u8c03\u7528<\/code><\/pre>\n
                      Promise\u9759\u6001\u65b9\u6cd5<\/h4>\n
                      \u5e38\u7528\u4e00\u4e9b\u9759\u6001\u65b9\u6cd5\uff0c\u7528\u4e8e\u64cd\u4f5c\u6216\u751f\u6210Promise<\/code>\u5bf9\u8c61\u5b9e\u4f8b<\/p>\n
                      \/\/ \u5e38\u7528\u65b9\u6cd5\nPromise.resolve(1) \/\/ \u751f\u6210\u76f4\u63a5\u5b8c\u6210Promise\nPromise.reject(1) \/\/ \u751f\u6210\u76f4\u63a5\u62d2\u7eddPromise\nPromise.all([]) \/\/ \u7b49\u5f85\u591a\u4e2aPromise\uff0c\u90fd\u6210\u529f\u624d\u6210\u529f\uff0c\u5931\u8d25\u4e00\u4e2a\u5c31reject\nPromise.allSettled([]) \/\/ \u7b49\u5f85\u591a\u4e2aPromise\uff0c\u6267\u884c\u5b8c\uff0c\u5931\u8d25\u4e5f\u5305\u542b\u5728\u7ed3\u679c\u5185\nPromise.any([]) \/\/ \u6709\u4e00\u4e2a\u6210\u529f\u5c31\u8fd4\u56de\uff0c\u90fd\u5931\u8d25\u65f6\u62d2\u7edd<\/code><\/pre>\n
                      async\u548cawait<\/h4>\n
                      async<\/code>\u548cawait<\/code>\u662f\u4e3a\u4e86\u7b80\u5316Promise<\/code>\u5f00\u53d1\uff0c\u5176\u5b9e\u662f\u8bed\u6cd5\u7cd6\uff0c\u6709\u4e00\u4e9b\u6ce8\u610f\u4e8b\u9879<\/p>\n
                        \n
                      1. \n
                        await<\/code>\u540e\u9762\u7684\u4ee3\u7801\u7c7b\u4f3c\u4e8e\u5728then<\/code>\u51fd\u6570\u4e2d\u6267\u884c\uff0c\u5fc5\u987b\u7ed9\u51fd\u6570\u6dfb\u52a0async<\/code><\/p>\n
                          \n
                        1. \n
                          async function a(){\n  console.log('\u5f00\u59cb\u6267\u884c\u6267\u884c1')\n  const promise = new Promise(resolve=>{ \/\/ \u751f\u6210Promise\n      console.log('\u751f\u6210Promise2')\n      setTimeout(()=>{\n          resolve()\n      }, 1000)\n  })\n  promise.then(()=>{\n      console.log('then\uff1a\u7b49\u5f851\u79d2\u540e\u6267\u884c3')\n  })\n  await promise\n  console.log('await\uff1a\u7b49\u5f851\u79d2\u540e\u6267\u884c4')\n}\na()<\/code><\/pre>\n<\/li>\n<\/ol>\n<\/li>\n
                        2. \n
                          \u52a0\u4e86async<\/code>\u7684\u51fd\u6570\u65e0\u8bba\u539f\u6765\u8fd4\u56de\u4ec0\u4e48\uff0c\u90fd\u662f\u8fd4\u56dePromise<\/code>\u5bf9\u8c61\u4e86<\/p>\n
                            \n
                          1. \n
                            function a(){\n return 1 \n}\nasync function b(){ \/\/ \u6253\u4e0aasync\u6807\u8bb0\u540e\uff0c\u8fd4\u56de\u503c\u5c31\u4e0d\u518d\u662f1\u4e86\n  return 1\n}\nfunction c(){\n  return Promise.resolve(1)\n}\nasync function d(){\n  return Promise.resolve(1) \/\/ async\u51fd\u6570\u5982\u679c\u5df2\u7ecf\u8fd4\u56dePromise\uff0c\u5c31\u7528\u8fd4\u56de\u7684Promise\n}\nconsole.log(a())\nconsole.log(b())\nconsole.log(c()) \/\/ b\u548cc\u51fd\u6570\u57fa\u672c\u7b49\u4ef7\nconsole.log(d())<\/code><\/pre>\n<\/li>\n<\/ol>\n<\/li>\n
                          2. \n
                            \u4e0d\u662f\u6240\u6709\u51fd\u6570\u90fd\u652f\u6301\u88ab\u53d8\u6210\u5f02\u6b65\u51fd\u6570\uff0c\u6709\u4e9b\u76f4\u63a5\u4f9d\u8d56\u8fd4\u56de\u503c\u7684\u51fd\u6570\u4e0d\u80fd\u7528async<\/p>\n
                              \n
                            1. \u4f5c\u4e3a\u56de\u8c03\u51fd\u6570\u9700\u8981\u6ce8\u610f\u4e00\u4e0b\u662f\u5426\u652f\u6301\u8fd4\u56dePromise<\/code><\/li>\n<\/ol>\n<\/li>\n
                            2. \n
                              await<\/code>\u5f02\u5e38\u5904\u7406\uff0cawait<\/code>\u9047\u5230reject<\/code>\u7684\u8bdd\uff0c\u5c06\u629b\u51fa\u5f02\u5e38<\/p>\n
                                \n
                              1. \n
                                async function a(){\n  await Promise.reject(new Error('Test Error'))\n    console.log('\u6267\u884c\u4e0d\u5230\u8fd9\u91cc')\n}\na()\n\/\/ \u5f02\u5e38\u5904\u7406\u65b9\u5f0f1\nasync function b(){\n  await Promise.reject(new Error('Test Error'))\n    .catch(err=>console.log(err)) \/\/ catch\u4e4b\u540e\u6b63\u5e38\u6267\u884c\uff0ccatch\u4e4b\u540e\u8fd4\u56de\u4e00\u4e2a\u65b0\u7684Promise\uff0c\u72b6\u6001\u662ffulfilled\n    console.log('\u53ef\u4ee5\u6267\u884c\u5230\u8fd9\u91cc')\n}\nb()\n\/\/ \u5f02\u5e38\u5904\u7406\u65b9\u5f0f2\nasync function c(){\n  try{\n       await Promise.reject(new Error('Test Error'))\n  }catch(err){\n      console.log(err)\n  }\n    console.log('\u53ef\u4ee5\u6267\u884c\u5230\u8fd9\u91cc')\n}\nc()<\/code><\/pre>\n<\/li>\n<\/ol>\n<\/li>\n
                              2. \n
                                \u591a\u4e2a\u5f02\u6b65\u51fd\u6570\u7b49\u5f85\u95ee\u9898\uff0c\u5982\u679c\u4e1a\u52a1\u652f\u6301\u5e76\u53d1\u7b49\u5f85\uff0c\u4e0d\u8981\u4f7f\u7528\u987a\u5e8fawait<\/code>\u7b49\u5f85<\/p>\n
                                  \n
                                1. \n
                                  async function a(input){\n  await new Promise((resolve)=>{\n      setTimeout(function(){\n          console.log(function a ${input}<\/code>)\n          resolve()\n      }, 3000)\n  })\n}\nasync function b(input){\n  await new Promise((resolve)=>{\n      setTimeout(function(){\n          console.log(function b ${input}<\/code>)\n          resolve()\n      }, 3000)\n  })\n}\nasync function c(){\n await a('c')\n await b('c') \/\/ \u987a\u5e8f\u7b49\u5f85\uff0c\u662f\u5426\u662f\u4e1a\u52a1\u9700\u8981\u8fd9\u6837\uff1f\n console.log('c\u6267\u884c\u5b8c\u6210')\n}\nc()\nasync function d(){\n const pa = a('d')\n const pb = b('d')\n \/\/ \u5e76\u53d1\u7b49\u5f85\n \/\/ await Promise.all([pa, pb])\n await pa\n await pb\n console.log('d\u6267\u884c\u5b8c\u6210')\n}\nd()<\/code><\/pre>\n<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n
                                  \u6a21\u5757\u5316<\/h3>\n
                                  ES6<\/code>\u652f\u6301\u6a21\u5757\u5316\u4ee3\u7801\uff0cES6<\/code>\u4e4b\u524d\uff0cjs<\/code>\u4ee3\u7801\u5728\u5f15\u5165\u4e4b\u540e\u76f4\u63a5\u6267\u884c\uff0c\u4ea7\u751f\u7684\u53d8\u91cf\u53ef\u80fd\u5f71\u54cd\u5168\u5c40\u5bf9\u8c61\u3002<\/p>\n
                                  \u5e73\u65f6\u4f7f\u7528\u6253\u5305\u5de5\u5177\u53ef\u80fd\u8fd8\u4f1a\u63a5\u89e6\u5230nodejs<\/code>\u7684\u6a21\u5757\u5316<\/p>\n
                                  ES6\u6a21\u5757<\/h4>\n
                                  \u5bfc\u51fa\u6a21\u5757\uff0c\u5047\u8bbe\u6587\u4ef6\u4e3a\uff1a.\/utils\/index.js<\/code>\uff1a<\/p>\n
                                  export const a = '1' \/\/ \u547d\u540d\u5bfc\u51fa\nconst b = '2'\nexport { b as nb } \/\/ \u5bfc\u51fa\u91cd\u547d\u540d\nexport default { \/\/ \u9ed8\u8ba4\u5bfc\u51fa\u53ea\u80fd\u6709\u4e00\u4e2a\n    c: '3'\n}<\/code><\/pre>\n
                                  \u4e0a\u9762\u5bfc\u51fa\u5bf9\u8c61\u7ed3\u6784\u7c7b\u4f3c\uff1a<\/p>\n
                                  {\n    a: '1',\n    nb: '2',\n    default: {\n        c: '3'\n    }\n}<\/code><\/pre>\n
                                  \u5bfc\u5165\u6a21\u5757\uff1a<\/p>\n
                                  import dayjs from 'dayjs' \/\/ \u4ece\u5e93\u4e2d\u5bfc\u5165default\u6a21\u5757\nimport { createApp } from 'vue' \/\/ \u547d\u540d\u5bfc\u5165\uff0c\u6709\u70b9\u7c7b\u4f3c\u89e3\u6784\nimport { a as na } from '.\/utils' \/\/ \u5bfc\u5165\u91cd\u547d\u540d\nimport * as allUtils from '.\/utils' \/\/ \u5bfc\u5165\u5168\u90e8 allUtils.default\u4e3a\u9ed8\u8ba4\u5bfc\u51fa\u6570\u636e\n\nconst comp = import('.\/utils') \/\/ import\u51fd\u6570\u5f02\u6b65\u5bfc\u5165\uff0c\u8fd4\u56dePromise<\/code><\/pre>\n
                                  \u6ce8\u610f\uff1a\u5c3d\u91cf\u4f7f\u7528\u547d\u540d\u5bfc\u5165\u548c\u5bfc\u51fa\uff0c\u73b0\u4ee3\u6253\u5305\u5de5\u5177\u4e00\u822c\u90fd\u652f\u6301treeshaking<\/code>\uff0c\u6ca1\u6709\u7528\u5230\u7684\u5bfc\u51fa\u53ef\u4ee5\u5728\u6253\u5305\u7684\u65f6\u5019\u4e0d\u6253\u5165\u6784\u5efa\u7ed3\u679c\u4e2d\uff0c\u51cf\u5c11js\u4f53\u79ef<\/strong><\/p>\n
                                  Nodejs\u6a21\u5757<\/h4>\n
                                  NodeJS<\/code>\u4e2d\u4f7f\u7528CommonJS<\/code>\u89c4\u8303\u6a21\u5757\u5316\uff0c\u4f7f\u7528require<\/code>\u5bfc\u5165\uff0c\u4e00\u822c\u4e86\u89e3\u5373\u53ef<\/p>\n
                                  \u5bfc\u51fa\u6a21\u5757\uff1a<\/p>\n
                                  const a = 1\nmodule.exports = {\n    a\n}\nmodule.exports.b = 2<\/code><\/pre>\n
                                  \u5bfc\u5165\u6a21\u5757\uff1a<\/p>\n
                                  const fs = require('fs') \/\/ \u5bfc\u5165\u5e93\nconst utils = require('.\/utils') \/\/ \u672c\u5730\u5bfc\u5165<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
                                  AI\u6458\u8981 \u8fd9\u7bc7\u6587\u7ae0\u6df1\u5165\u4ecb\u7ecd\u4e86 JavaScript \u548c ES \u57fa\u7840\u77e5\u8bc6\u4ee5\u53ca\u5e38\u7528\u6280\u5de7\u3002\u6587\u7ae0\u9996\u5148\u8ba8\u8bba\u4e86\u53d8\u91cf\u57fa\u7840\uff0c\u5305 […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[6],"tags":[98,147,148],"_links":{"self":[{"href":"https:\/\/fugary.com\/index.php?rest_route=\/wp\/v2\/posts\/586"}],"collection":[{"href":"https:\/\/fugary.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fugary.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fugary.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fugary.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=586"}],"version-history":[{"count":3,"href":"https:\/\/fugary.com\/index.php?rest_route=\/wp\/v2\/posts\/586\/revisions"}],"predecessor-version":[{"id":589,"href":"https:\/\/fugary.com\/index.php?rest_route=\/wp\/v2\/posts\/586\/revisions\/589"}],"wp:attachment":[{"href":"https:\/\/fugary.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=586"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fugary.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=586"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fugary.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=586"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}