{"id":11895,"date":"2023-11-28T22:36:58","date_gmt":"2023-11-28T14:36:58","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=11895"},"modified":"2023-11-30T18:26:08","modified_gmt":"2023-11-30T10:26:08","slug":"javascript-zhong-javascript-dai-ma-zhong-deuse-str","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/11\/28\/javascript-zhong-javascript-dai-ma-zhong-deuse-str\/","title":{"rendered":"JavaScript \u4e2d JavaScript \u4ee3\u7801\u4e2d\u7684 “use strict”; \u662f\u4ec0\u4e48\u610f\u601d\uff1f\u4f7f\u7528\u5b83\u533a\u522b\u662f\u4ec0\u4e48\uff1f"},"content":{"rendered":"

"use strict";<\/code> \u662f JavaScript \u7684\u4e25\u683c\u6a21\u5f0f\uff08Strict Mode\uff09\uff0c\u662f ES5 \u5f15\u5165\u7684\u4e00\u79cd\u7279\u6b8a\u6a21\u5f0f\uff0c\u76ee\u7684\u662f\u4f7f JavaScript \u66f4\u52a0\u4e25\u683c\uff0c\u51cf\u5c11\u4e00\u4e9b\u4e0d\u5b89\u5168\u7684\u884c\u4e3a\u548c\u63d0\u4f9b\u66f4\u597d\u7684\u9519\u8bef\u68c0\u67e5\u3002<\/p>\n

<\/span><\/a>\u4f7f\u7528\u4e25\u683c\u6a21\u5f0f\u7684\u533a\u522b\u5305\u62ec\u4ee5\u4e0b\u51e0\u70b9\uff1a<\/h3>\n
    \n
  1. \n

    \u9519\u8bef\u68c0\u67e5\u66f4\u4e25\u683c\uff1a<\/strong> \u4e25\u683c\u6a21\u5f0f\u4e0b\uff0c\u4e00\u4e9b\u4e0d\u89c4\u8303\u6216\u6f5c\u5728\u7684\u9519\u8bef\u4f1a\u629b\u51fa\u66f4\u591a\u7684\u9519\u8bef\u6216\u8b66\u544a\uff0c\u4f7f\u5f97\u5f00\u53d1\u8005\u66f4\u5bb9\u6613\u53d1\u73b0\u5e76\u4fee\u590d\u95ee\u9898\u3002<\/p>\n<\/li>\n

  2. \n

    \u53d8\u91cf\u5fc5\u987b\u58f0\u660e\uff1a<\/strong> \u4e25\u683c\u6a21\u5f0f\u8981\u6c42\u53d8\u91cf\u5728\u4f7f\u7528\u4e4b\u524d\u5fc5\u987b\u5148\u58f0\u660e\uff0c\u5426\u5219\u4f1a\u629b\u51fa\u9519\u8bef\u3002<\/p>\n<\/li>\n

  3. \n

    \u7981\u6b62\u4f7f\u7528\u672a\u58f0\u660e\u7684\u53d8\u91cf\uff1a<\/strong> \u5728\u4e25\u683c\u6a21\u5f0f\u4e0b\uff0c\u4f7f\u7528\u672a\u58f0\u660e\u7684\u53d8\u91cf\u4f1a\u629b\u51fa\u9519\u8bef\u3002<\/p>\n<\/li>\n

  4. \n

    \u7981\u6b62\u5220\u9664\u53d8\u91cf\uff1a<\/strong> \u4e25\u683c\u6a21\u5f0f\u4e0b\u65e0\u6cd5\u4f7f\u7528 delete<\/code> \u64cd\u4f5c\u7b26\u5220\u9664\u53d8\u91cf\u6216\u51fd\u6570\u3002<\/p>\n<\/li>\n

  5. \n

    \u51fd\u6570\u4e2d\u7684 this<\/code> \u6307\u5411\u4e0d\u540c\uff1a<\/strong> \u5728\u4e25\u683c\u6a21\u5f0f\u4e0b\uff0c\u51fd\u6570\u7684 this<\/code> \u6307\u5411\u5728\u975e\u4e25\u683c\u6a21\u5f0f\u4e0b\u7684\u4e00\u4e9b\u60c5\u51b5\u4e0b\u4f1a\u6709\u53d8\u5316\uff0c\u6bd4\u5982\u5728\u5168\u5c40\u4f5c\u7528\u57df\u4e2d\u8c03\u7528\u51fd\u6570\u65f6\uff0c\u975e\u4e25\u683c\u6a21\u5f0f\u4e0b this<\/code> \u6307\u5411\u5168\u5c40\u5bf9\u8c61\uff0c\u800c\u4e25\u683c\u6a21\u5f0f\u4e0b this<\/code> \u662f undefined<\/code>\u3002<\/p>\n<\/li>\n

  6. \n

    \u7981\u6b62\u4f7f\u7528\u516b\u8fdb\u5236\u8868\u793a\uff1a<\/strong> \u4e25\u683c\u6a21\u5f0f\u4e0b\u4e0d\u5141\u8bb8\u4f7f\u7528\u516b\u8fdb\u5236\u8868\u793a\u6cd5\uff08\u5982 010<\/code>\uff09\u3002<\/p>\n<\/li>\n

  7. \n

    \u7981\u6b62\u4f7f\u7528 with<\/code> \u8bed\u53e5\uff1a<\/strong> with<\/code> \u8bed\u53e5\u5728\u4e25\u683c\u6a21\u5f0f\u4e0b\u88ab\u7981\u6b62\u4f7f\u7528\u3002<\/p>\n<\/li>\n

  8. \n

    eval \u9650\u5236\uff1a<\/strong> \u5728\u4e25\u683c\u6a21\u5f0f\u4e0b\uff0c\u4f7f\u7528 eval<\/code> \u521b\u5efa\u7684\u53d8\u91cf\u6216\u51fd\u6570\u4e0d\u4f1a\u88ab\u6dfb\u52a0\u5230\u5f53\u524d\u4f5c\u7528\u57df\uff0c\u4e14 eval<\/code> \u7684\u4f5c\u7528\u57df\u662f\u5c01\u95ed\u7684\u3002<\/p>\n<\/li>\n<\/ol>\n

    \u542f\u7528\u4e25\u683c\u6a21\u5f0f\u7684\u65b9\u5f0f\u662f\u5728\u811a\u672c\u6216\u51fd\u6570\u7684\u5f00\u5934\u52a0\u4e0a "use strict";<\/code> \u5b57\u7b26\u4e32\u3002\u4e25\u683c\u6a21\u5f0f\u63d0\u4f9b\u4e86\u66f4\u5b89\u5168\u3001\u66f4\u89c4\u8303\u7684\u7f16\u7801\u65b9\u5f0f\uff0c\u6709\u52a9\u4e8e\u907f\u514d\u4e00\u4e9b\u6f5c\u5728\u7684\u9519\u8bef\uff0c\u5e76\u63d0\u9ad8\u4ee3\u7801\u8d28\u91cf\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

    "use strict"; \u662f JavaScript \u7684\u4e25\u683c\u6a21\u5f0f\uff08Strict Mode\uff09 […]<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[115],"tags":[],"class_list":["post-11895","post","type-post","status-publish","format-standard","hentry","category-javascript"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/11895","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=11895"}],"version-history":[{"count":2,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/11895\/revisions"}],"predecessor-version":[{"id":13629,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/11895\/revisions\/13629"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=11895"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=11895"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=11895"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}