{"id":165770,"date":"2024-05-08T15:22:53","date_gmt":"2024-05-08T07:22:53","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/165770.html"},"modified":"2024-05-08T15:22:56","modified_gmt":"2024-05-08T07:22:56","slug":"javascript%e4%b8%ad%e4%b8%ba%e4%bb%80%e4%b9%88%e4%b8%8d%e8%83%bd%e7%9b%b4%e6%8e%a5%e5%86%99","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/165770.html","title":{"rendered":"javascript\u4e2d\u4e3a\u4ec0\u4e48\u4e0d\u80fd\u76f4\u63a5\u5199{"},"content":{"rendered":"

\"javascript\u4e2d\u4e3a\u4ec0\u4e48\u4e0d\u80fd\u76f4\u63a5\u5199{\"<\/p>\n

\u5728JavaScript\u4e2d\uff0c\u4e0d\u80fd\u76f4\u63a5\u5199{<\/code>\u662f\u56e0\u4e3a\u5728JavaScript\u7684\u8bed\u6cd5\u89e3\u6790\u4e2d\uff0c\u8fd9\u4e2a\u5b57\u7b26\u6709\u591a\u91cd\u542b\u4e49\u3002\u5b83\u65e2\u53ef\u4ee5\u8868\u793a\u4ee3\u7801\u5757\u7684\u5f00\u59cb\uff0c\u4e5f\u53ef\u4ee5\u8868\u793a\u4e00\u4e2a\u5bf9\u8c61\u5b57\u9762\u91cf\u7684\u5f00\u59cb\u3002\u56e0\u6b64\uff0c\u5f53\u5b83\u72ec\u7acb\u51fa\u73b0\u65f6\uff0c\u89e3\u6790\u5668\u53ef\u80fd\u4f1a\u65e0\u6cd5\u786e\u5b9a\u5176\u4e0a\u4e0b\u6587\u610f\u4e49\uff0c\u5bfc\u81f4\u8bed\u6cd5\u9519\u8bef\u6216\u4e0d\u9884\u671f\u7684\u884c\u4e3a\u3002\u5177\u4f53\u6765\u8bf4\uff0c\u8fd9\u79cd\u6a21\u7cca\u6027\u4f1a\u5728\u65e0\u6cd5\u660e\u786e\u5176\u4f5c\u4e3a\u5bf9\u8c61\u8fd8\u662f\u4ee3\u7801\u5757\u8d77\u59cb\u7684\u573a\u666f\u4e0b\u663e\u5f97\u5c24\u4e3a\u7a81\u51fa\u3002\u4e3e\u4e2a\u4f8b\u5b50\uff0c\u5f53JavaScript\u5f15\u64ce\u9047\u5230\u5f00\u5934\u4e3a{<\/code>\u7684\u884c\u65f6\uff0c\u5b83\u9700\u8981\u6839\u636e\u540e\u7eed\u7684\u4ee3\u7801\u6765\u63a8\u65ad\u662f\u5e94\u8be5\u5c06\u5176\u89e3\u6790\u4e3a\u4e00\u4e2a\u5bf9\u8c61\u8fd8\u662f\u4e00\u4e2a\u4ee3\u7801\u5757\u3002\u82e5\u76f4\u63a5\u5199{<\/code>\u5e76\u672a\u7d27\u8ddf\u4efb\u4f55\u80fd\u591f\u660e\u786e\u5176\u8eab\u4efd\uff08\u5bf9\u8c61\u8fd8\u662f\u4ee3\u7801\u5757\uff09\u7684\u4ee3\u7801\uff0c\u89e3\u6790\u5668\u5c31\u4f1a\u9677\u5165\u56f0\u5883\u3002<\/p>\n<\/p>\n

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\u7531\u4e8e{<\/code>\u5728JavaScript\u4e2d\u7684\u53cc\u91cd\u89d2\u8272\uff0c\u5f53\u89e3\u6790\u5668\u9047\u5230\u4e00\u4e2a\u5b64\u7acb\u7684{<\/code>\u65f6\uff0c\u5b83\u65e0\u6cd5\u76f4\u63a5\u5224\u65ad\u8fd9\u662f\u8981\u58f0\u660e\u4e00\u4e2a\u65b0\u7684\u4ee3\u7801\u5757\u8fd8\u662f\u5f00\u59cb\u5b9a\u4e49\u4e00\u4e2a\u5bf9\u8c61\u3002\u8fd9\u79cd\u6a21\u7cca\u6027\u4f1a\u4f7f\u5f97\u89e3\u6790\u5668\u9677\u5165\u6df7\u4e71\uff0c\u6700\u7ec8\u5bfc\u81f4\u4ee3\u7801\u7684\u89e3\u6790\u7ed3\u679c\u4e0e\u5f00\u53d1\u8005\u9884\u671f\u4e0d\u4e00\u81f4\u3002<\/p>\n<\/p>\n

\u56f0\u5883\u7684\u540e\u679c<\/h3>\n<\/p>\n

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\u4e09\u3001\u907f\u514d\u6df7\u6dc6\u7684\u6700\u4f73\u5b9e\u8df5<\/h2>\n<\/p>\n

\u660e\u6670\u4e0a\u4e0b\u6587<\/h3>\n<\/p>\n

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\u4f7f\u7528\u81ea\u8c03\u7528\u51fd\u6570\u8868\u8fbe\u5f0f<\/h3>\n<\/p>\n

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\u56db\u3001\u6848\u4f8b\u5206\u6790<\/h2>\n<\/p>\n

\u9519\u8bef\u4f7f\u7528{<\/code>\u7684\u793a\u4f8b<\/h3>\n<\/p>\n

\/\/ \u9519\u8bef\u7684\u793a\u4f8b<\/p>\n
{<\/p>\n
    let a = 2;<\/p>\n
}<\/p>\n
\/\/ \u8fd9\u91cc\u89e3\u6790\u5668\u53ef\u80fd\u4f1a\u5c06\u4e0a\u8ff0\u4ee3\u7801\u7247\u6bb5\u8bef\u89e3\u4e3a\u4e00\u4e2a\u5bf9\u8c61\u5b57\u9762\u91cf\u7684\u5f00\u59cb\u3002<\/p>\n
### \u6b63\u786e\u7684\u7528\u6cd5\u793a\u4f8b<\/p>\n
```javascript<\/p>\n
\/\/ \u5c06\u5bf9\u8c61\u5b57\u9762\u91cf\u8d4b\u503c\u7ed9\u53d8\u91cf<\/p>\n
let obj = {<\/p>\n
    a: 1,<\/p>\n
    b: 2<\/p>\n
};<\/p>\n
\/\/ \u4f7f\u7528\u81ea\u8c03\u7528\u51fd\u6570\u8868\u8fbe\u5f0f<\/p>\n
(function() {<\/p>\n
    let a = 2;<\/p>\n
})();<\/p>\n
<\/code><\/pre>\n<\/p>\n
\u8fd9\u4e24\u4e2a\u793a\u4f8b\u6e05\u6670\u5730\u8868\u660e\u4e86\u5982\u4f55\u907f\u514d\u6df7\u6dc6\u548c\u9519\u8bef\uff0c\u540c\u65f6\u4e5f\u5c55\u793a\u4e86\u5728\u4e0d\u540c\u573a\u666f\u4e0b{<\/code>\u6b63\u786e\u7684\u4f7f\u7528\u65b9\u5f0f\u3002<\/p>\n<\/p>\n
\u603b\u7ed3\u6765\u8bf4\uff0c\u4e0d\u80fd\u76f4\u63a5\u5199{<\/code>\u662f\u56e0\u4e3a\u5176\u5728JavaScript\u4e2d\u5177\u6709\u591a\u91cd\u8bed\u6cd5\u542b\u4e49\uff0c\u6b63\u786e\u7684\u505a\u6cd5\u662f\u6839\u636e\u5176\u9884\u671f\u7684\u89d2\u8272\uff0c\u5c06\u5176\u7f6e\u4e8e\u9002\u5f53\u7684\u8bed\u6cd5\u4e0a\u4e0b\u6587\u4e2d\uff0c\u4ee5\u907f\u514d\u6f5c\u5728\u7684\u89e3\u6790\u9519\u8bef\u548c\u6b67\u4e49\u3002\u901a\u8fc7\u7406\u89e3\u5e76\u5e94\u7528\u8fd9\u4e00\u539f\u5219\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u7f16\u5199\u51fa\u66f4\u6e05\u6670\u3001\u66f4\u7a33\u5065\u7684JavaScript\u4ee3\u7801\u3002<\/p>\n<\/p>\n
\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n
1. JavaScript\u4e2d\u4e3a\u4ec0\u4e48\u4e0d\u80fd\u76f4\u63a5\u5199\u5927\u62ec\u53f7{<\/code>\uff1f<\/strong><\/p>\n
\u5728JavaScript\u4e2d\uff0c\u5927\u62ec\u53f7{}<\/code>\u662f\u7528\u6765\u5b9a\u4e49\u5bf9\u8c61\u5b57\u9762\u91cf\u548c\u4ee3\u7801\u5757\u7684\uff0c\u800c\u4e0d\u662f\u76f4\u63a5\u5199\u5728\u8bed\u53e5\u4e2d\u3002\u5982\u679c\u4f60\u76f4\u63a5\u5199\u4e00\u4e2a\u5927\u62ec\u53f7\uff0cJavaScript\u5c06\u4f1a\u5c06\u5176\u4f5c\u4e3a\u4e00\u4e2a\u8bed\u6cd5\u9519\u8bef\u3002\u4f60\u9700\u8981\u5c06\u5927\u62ec\u53f7\u5d4c\u5957\u5728\u9002\u5f53\u7684\u8bed\u53e5\u6216\u8bed\u6cd5\u7ed3\u6784\u4e2d\uff0c\u6bd4\u5982\u51fd\u6570\u3001\u6761\u4ef6\u8bed\u53e5\u3001\u5faa\u73af\u8bed\u53e5\u7b49\u3002<\/p>\n
2. \u5982\u4f55\u6b63\u786e\u4f7f\u7528\u5927\u62ec\u53f7{}<\/code>\u5728JavaScript\u4e2d\uff1f<\/strong><\/p>\n
\u5728JavaScript\u4e2d\uff0c\u5927\u62ec\u53f7{}<\/code>\u7684\u4f7f\u7528\u6709\u4e24\u4e2a\u4e3b\u8981\u65b9\u9762\u3002\u9996\u5148\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528\u5927\u62ec\u53f7\u6765\u5b9a\u4e49\u5bf9\u8c61\u5b57\u9762\u91cf\uff0c\u901a\u8fc7\u5728\u5927\u62ec\u53f7\u4e2d\u5217\u51fa\u952e\u503c\u5bf9\u6765\u521b\u5efa\u4e00\u4e2a\u5bf9\u8c61\u3002\u5176\u6b21\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528\u5927\u62ec\u53f7\u6765\u5b9a\u4e49\u4ee3\u7801\u5757\uff0c\u5c06\u4e00\u7ec4\u8bed\u53e5\u7ec4\u7ec7\u5728\u4e00\u8d77\uff0c\u5728\u6761\u4ef6\u8bed\u53e5\u3001\u5faa\u73af\u8bed\u53e5\u4ee5\u53ca\u51fd\u6570\u4e2d\u4f7f\u7528\u3002<\/p>\n
\u4e3e\u4e2a\u4f8b\u5b50\uff0c\u5982\u679c\u4f60\u60f3\u5b9a\u4e49\u4e00\u4e2a\u5305\u542b\u591a\u4e2a\u5c5e\u6027\u7684\u5bf9\u8c61\uff0c\u53ef\u4ee5\u4f7f\u7528\u5927\u62ec\u53f7\u6765\u5b9a\u4e49\u5bf9\u8c61\u5b57\u9762\u91cf\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n
let person = {\n  name: "John",\n  age: 30,\n  occupation: "Developer"\n};\n<\/code><\/pre>\n
\u5982\u679c\u4f60\u60f3\u5728\u6761\u4ef6\u8bed\u53e5\u4e2d\u4f7f\u7528\u4ee3\u7801\u5757\uff0c\u53ef\u4ee5\u4f7f\u7528\u5927\u62ec\u53f7\u5c06\u8981\u6267\u884c\u7684\u8bed\u53e5\u5305\u88f9\u8d77\u6765\uff0c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n
if (condition) {\n  \/\/ \u6267\u884c\u8bed\u53e5\n} else {\n  \/\/ \u6267\u884c\u8bed\u53e5\n}\n<\/code><\/pre>\n
3. JavaScript\u4e2d\u76f4\u63a5\u5199\u5927\u62ec\u53f7{}<\/code>\u4f1a\u5bfc\u81f4\u4ec0\u4e48\u9519\u8bef\uff1f<\/strong><\/p>\n
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