{"id":62435,"date":"2023-11-20T16:02:39","date_gmt":"2023-11-20T08:02:39","guid":{"rendered":"https:\/\/docs.pingcode.com\/?p=62435"},"modified":"2023-11-20T16:02:50","modified_gmt":"2023-11-20T08:02:50","slug":"es6%e6%96%b0%e7%89%b9%e6%80%a7%e6%9c%89%e5%93%aa%e4%ba%9b-2","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/62435.html","title":{"rendered":"ES6\u65b0\u7279\u6027\u6709\u54ea\u4e9b"},"content":{"rendered":"\n
\n

ES6\u65b0\u7279\u6027\u6709\uff1a1. \u7bad\u5934\u51fd\u6570\uff1b2. \u6a21\u677f\u5b57\u7b26\u4e32\uff1b3. \u89e3\u6784\u8d4b\u503c\uff1b4. \u7c7b\uff1b5. \u6a21\u5757\uff1b6. Promise\uff1b7. \u5176\u4ed6\u65b0\u7279\u6027\u3002ES6\u5f15\u5165\u4e86\u7bad\u5934\u51fd\u6570\uff0c\u7b80\u5316\u4e86\u51fd\u6570\u7684\u5b9a\u4e49\u548c\u4f7f\u7528\uff0c\u4f7f\u4ee3\u7801\u66f4\u4e3a\u7b80\u6d01\u3002\u7bad\u5934\u51fd\u6570\u6ca1\u6709\u81ea\u5df1\u7684this\uff0c\u5b83\u7ee7\u627f\u4e86\u7236\u4f5c\u7528\u57df\u7684this\uff0c\u907f\u514d\u4e86\u4f20\u7edf\u51fd\u6570\u4e2dthis\u6307\u5411\u7684\u56f0\u6270\u3002<\/p>\n<\/blockquote>\n\n\n\n

1. \u7bad\u5934\u51fd\u6570<\/h2>\n\n\n\n

ES6\u5f15\u5165\u4e86\u7bad\u5934\u51fd\u6570\uff0c\u7b80\u5316\u4e86\u51fd\u6570\u7684\u5b9a\u4e49\u548c\u4f7f\u7528\uff0c\u4f7f\u4ee3\u7801\u66f4\u4e3a\u7b80\u6d01\u3002\u7bad\u5934\u51fd\u6570\u6ca1\u6709\u81ea\u5df1\u7684this\uff0c\u5b83\u7ee7\u627f\u4e86\u7236\u4f5c\u7528\u57df\u7684this\uff0c\u907f\u514d\u4e86\u4f20\u7edf\u51fd\u6570\u4e2dthis\u6307\u5411\u7684\u56f0\u6270\u3002<\/p>\n\n\n\n

\/\/ \u4f20\u7edf\u51fd\u6570\nfunction add(a, b) {\n    return a + b;\n}\n\n\/\/ \u7bad\u5934\u51fd\u6570\nconst add = (a, b) => a + b;<\/code><\/pre>\n\n\n\n
2. \u6a21\u677f\u5b57\u7b26\u4e32<\/h2>\n\n\n\n
\u6a21\u677f\u5b57\u7b26\u4e32\u5141\u8bb8\u5728\u5b57\u7b26\u4e32\u4e2d\u5d4c\u5165\u8868\u8fbe\u5f0f\uff0c\u63d0\u9ad8\u4e86\u5b57\u7b26\u4e32\u7684\u53ef\u8bfb\u6027\u548c\u7075\u6d3b\u6027\u3002\u4f7f\u7528\u53cd\u5f15\u53f7\uff08`\uff09\u5b9a\u4e49\u6a21\u677f\u5b57\u7b26\u4e32\uff0c\u5e76\u901a\u8fc7<\/code>${}`\u63d2\u5165\u8868\u8fbe\u5f0f\u3002<\/p>\n\n\n\n
const name = 'John';\nconst greeting = `Hello, ${name}!`;<\/code><\/pre>\n\n\n\n
3. \u89e3\u6784\u8d4b\u503c<\/h2>\n\n\n\n
\u89e3\u6784\u8d4b\u503c\u5141\u8bb8\u4ece\u6570\u7ec4\u6216\u5bf9\u8c61\u4e2d\u63d0\u53d6\u503c\uff0c\u5e76\u8d4b\u7ed9\u53d8\u91cf\uff0c\u63d0\u9ad8\u4e86\u4ee3\u7801\u7684\u7b80\u6d01\u6027\u3002\u53ef\u4ee5\u7528\u4e8e\u6570\u7ec4\u548c\u5bf9\u8c61\u7684\u89e3\u6784\u3002<\/p>\n\n\n\n
\/\/ \u6570\u7ec4\u89e3\u6784\nconst [a, b] = [1, 2];\n\n\/\/ \u5bf9\u8c61\u89e3\u6784\nconst { x, y } = { x: 1, y: 2 };<\/code><\/pre>\n\n\n\n
4. \u7c7b<\/h2>\n\n\n\n
ES6\u5f15\u5165\u4e86\u7c7b\u7684\u6982\u5ff5\uff0c\u66f4\u63a5\u8fd1\u4f20\u7edf\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\uff0c\u63d0\u4f9b\u4e86\u7c7b\u3001\u7ee7\u627f\u3001\u6784\u9020\u51fd\u6570\u7b49\u7279\u6027\u3002\u4f7f\u5f97JavaScript\u4e2d\u7684\u9762\u5411\u5bf9\u8c61\u7f16\u7a0b\u66f4\u52a0\u6e05\u6670\u548c\u6613\u7528\u3002<\/p>\n\n\n\n
class Animal {\n    constructor(name) {\n        this.name = name;\n    }\n\n    speak() {\n        console.log(`${this.name} makes a sound.`);\n    }\n}\n\nclass Dog extends Animal {\n    speak() {\n        console.log(`${this.name} barks.`);\n    }\n}\n\nconst dog = new Dog('Buddy');\ndog.speak();<\/code><\/pre>\n\n\n\n
5. \u6a21\u5757<\/h2>\n\n\n\n
ES6\u6a21\u5757\u5316\u7cfb\u7edf\u901a\u8fc7import<\/code>\u548cexport<\/code>\u8bed\u6cd5\uff0c\u652f\u6301\u5c06\u4ee3\u7801\u62c6\u5206\u4e3a\u591a\u4e2a\u6587\u4ef6\uff0c\u63d0\u9ad8\u4e86\u4ee3\u7801\u7684\u53ef\u7ef4\u62a4\u6027\u548c\u590d\u7528\u6027\u3002\u6bcf\u4e2a\u6a21\u5757\u90fd\u6709\u81ea\u5df1\u7684\u4f5c\u7528\u57df\uff0c\u907f\u514d\u4e86\u5168\u5c40\u547d\u540d\u7a7a\u95f4\u7684\u6c61\u67d3\u3002<\/p>\n\n\n\n
\/\/ math.js\nexport const add = (a, b) => a + b;\n\n\/\/ mAI<\/a>n.js\nimport { add } from '.\/math';\nconsole.log(add(2, 3));<\/code><\/pre>\n\n\n\n
6. Promise<\/h2>\n\n\n\n
Promise\u662f\u4e00\u79cd\u5904\u7406\u5f02\u6b65\u64cd\u4f5c\u7684\u5bf9\u8c61\uff0c\u63d0\u4f9b\u4e86\u66f4\u6e05\u6670\u7684\u5f02\u6b65\u7f16\u7a0b\u65b9\u5f0f\uff0c\u907f\u514d\u4e86\u56de\u8c03\u5730\u72f1\u3002\u901a\u8fc7then<\/code>\u548ccatch<\/code>\u65b9\u6cd5\u5904\u7406\u5f02\u6b65\u64cd\u4f5c\u7684\u6210\u529f\u548c\u5931\u8d25\u3002<\/p>\n\n\n\n
const fetchData = () => {\n    return new Promise((resolve, reject) => {\n        \/\/ \u5f02\u6b65\u64cd\u4f5c\n        if (success) {\n            resolve(data);\n        } else {\n            reject(error);\n        }\n    });\n};\n\nfetchData()\n    .then(data => console.log(data))\n    .catch(error => console.error(error));<\/code><\/pre>\n\n\n\n
7. \u5176\u4ed6\u65b0\u7279\u6027<\/h2>\n\n\n\n
\u9664\u4e0a\u8ff0\u7279\u6027\u5916\uff0cES6\u8fd8\u5f15\u5165\u4e86\u4e00\u7cfb\u5217\u5176\u4ed6\u65b0\u7279\u6027\uff0c\u5982let<\/code>\u548cconst<\/code>\u5173\u952e\u5b57\u3001\u9ed8\u8ba4\u53c2\u6570\u3001rest\u548cspread\u8fd0\u7b97\u7b26\u7b49\uff0c\u4e30\u5bcc\u4e86JavaScript\u8bed\u6cd5\u548c\u529f\u80fd\u3002<\/p>\n\n\n\n
\"ES6\u65b0\u7279\u6027\u6709\u54ea\u4e9b\"<\/p>\n\n\n\n
\u5e38\u89c1\u95ee\u7b54\uff1a<\/strong><\/p>\n\n\n\n
    \n
  • \u95ee\uff1aES6\u662f\u4ec0\u4e48\uff1f<\/li>\n\n\n\n
  • \u7b54\uff1aES6\uff0c\u5168\u79f0ECMAScript 2015\uff0c\u662fJavaScript\u7684\u7b2c\u516d\u4e2a\u7248\u672c\uff0c\u4e8e2015\u5e74\u53d1\u5e03\u3002\u5b83\u5f15\u5165\u4e86\u8bb8\u591a\u65b0\u7279\u6027\u548c\u8bed\u6cd5\u7cd6\uff0c\u65e8\u5728\u63d0\u5347JavaScript\u7684\u53ef\u8bfb\u6027\u3001\u53ef\u7ef4\u62a4\u6027\uff0c\u5e76\u63d0\u4f9b\u66f4\u5f3a\u5927\u7684\u7f16\u7a0b\u529f\u80fd\u3002<\/li>\n<\/ul>\n\n\n\n
      \n
    • \u95ee\uff1aES6\u4e2d\u7684\u7bad\u5934\u51fd\u6570\u4e0e\u666e\u901a\u51fd\u6570\u6709\u4f55\u4e0d\u540c\uff1f<\/li>\n\n\n\n
    • \u7b54\uff1a\u7bad\u5934\u51fd\u6570\u4e0e\u666e\u901a\u51fd\u6570\u6709\u51e0\u4e2a\u91cd\u8981\u7684\u533a\u522b\u3002\u7bad\u5934\u51fd\u6570\u6ca1\u6709\u81ea\u5df1\u7684this\uff0c\u5b83\u4f1a\u6355\u83b7\u6240\u5728\u4e0a\u4e0b\u6587\u7684this\u503c\uff0c\u800c\u666e\u901a\u51fd\u6570\u7684this\u5728\u8fd0\u884c\u65f6\u6839\u636e\u8c03\u7528\u65b9\u5f0f\u800c\u53d8\u5316\u3002\u6b64\u5916\uff0c\u7bad\u5934\u51fd\u6570\u4e0d\u80fd\u4f7f\u7528new\u5173\u952e\u5b57\u8c03\u7528\uff0c\u4e5f\u4e0d\u80fd\u4f5c\u4e3a\u6784\u9020\u51fd\u6570\u4f7f\u7528\uff0c\u800c\u666e\u901a\u51fd\u6570\u53ef\u4ee5\u901a\u8fc7new\u5173\u952e\u5b57\u521b\u5efa\u5b9e\u4f8b\u3002\u53e6\u5916\uff0c\u7bad\u5934\u51fd\u6570\u6ca1\u6709arguments\u5bf9\u8c61\uff0c\u4f46\u53ef\u4ee5\u4f7f\u7528\u5269\u4f59\u53c2\u6570\u8bed\u6cd5\uff08\u2026args\uff09\u83b7\u53d6\u6240\u6709\u4f20\u5165\u7684\u53c2\u6570\uff0c\u800c\u666e\u901a\u51fd\u6570\u6709arguments\u5bf9\u8c61\u3002<\/li>\n<\/ul>\n\n\n\n
        \n
      • \u95ee\uff1aPromise\u5728\u5f02\u6b65\u7f16\u7a0b\u4e2d\u7684\u4f5c\u7528\u662f\u4ec0\u4e48\uff1f<\/li>\n\n\n\n
      • \u7b54\uff1aPromise\u662f\u4e00\u79cd\u7528\u4e8e\u5904\u7406\u5f02\u6b65\u64cd\u4f5c\u7684\u5bf9\u8c61\u3002\u5b83\u89e3\u51b3\u4e86\u56de\u8c03\u5730\u72f1\u95ee\u9898\uff0c\u63d0\u4f9b\u4e86\u4e00\u79cd\u66f4\u4f18\u96c5\u7684\u5904\u7406\u5f02\u6b65\u5d4c\u5957\u7684\u65b9\u5f0f\uff0c\u4ece\u800c\u63d0\u9ad8\u4e86\u4ee3\u7801\u7684\u53ef\u8bfb\u6027\u3002\u53e6\u5916\uff0cPromise\u901a\u8fc7\u94fe\u5f0f\u8c03\u7528\u7684\u65b9\u5f0f\u6355\u83b7\u5f02\u5e38\uff0c\u4f7f\u5f97\u9519\u8bef\u5904\u7406\u66f4\u52a0\u7075\u6d3b\u548c\u65b9\u4fbf\u3002\u5b83\u4ee3\u8868\u4e00\u4e2a\u5f02\u6b65\u64cd\u4f5c\u7684\u6700\u7ec8\u5b8c\u6210\u6216\u5931\u8d25\uff0c\u4f7f\u5f97\u5f02\u6b65\u7f16\u7a0b\u66f4\u52a0\u76f4\u89c2\u548c\u6613\u4e8e\u7406\u89e3\u3002\u540c\u65f6\uff0cPromise\u652f\u6301\u591a\u4e2a\u5f02\u6b65\u64cd\u4f5c\u7684\u534f\u540c\uff0c\u901a\u8fc7Promise.all\u548cPromise.race\u7b49\u65b9\u6cd5\uff0c\u5b9e\u73b0\u5e76\u884c\u6216\u7ade\u4e89\u6267\u884c\u591a\u4e2a\u5f02\u6b65\u64cd\u4f5c\u3002<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"ES6\u65b0\u7279\u6027\u6709\uff1a1. \u7bad\u5934\u51fd\u6570\uff1b2. \u6a21\u677f\u5b57\u7b26\u4e32\uff1b3. \u89e3\u6784\u8d4b\u503c\uff1b4. \u7c7b\uff1b5. \u6a21\u5757\uff1b6. Promise\uff1b […]","protected":false},"author":4,"featured_media":62438,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[3356,1554],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/62435"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=62435"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/62435\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/62438"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=62435"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=62435"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=62435"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}