{"id":12283,"date":"2023-11-28T22:49:06","date_gmt":"2023-11-28T14:49:06","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=12283"},"modified":"2023-11-29T23:13:49","modified_gmt":"2023-11-29T15:13:49","slug":"javascript-zhong-tan-tanthis-dui-xiang-de-li-jie","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/11\/28\/javascript-zhong-tan-tanthis-dui-xiang-de-li-jie\/","title":{"rendered":"JavaScript \u4e2d\u8c08\u8c08 This \u5bf9\u8c61\u7684\u7406\u89e3\uff1f"},"content":{"rendered":"

this<\/code> \u5728 JavaScript \u4e2d\u662f\u4e00\u4e2a\u5173\u952e\u5b57\uff0c\u5b83\u4ee3\u8868\u5f53\u524d\u6267\u884c\u4e0a\u4e0b\u6587\u4e2d\u7684\u5bf9\u8c61\u3002\u5176\u6307\u5411\u6839\u636e\u51fd\u6570\u8c03\u7528\u65b9\u5f0f\u548c\u4e0a\u4e0b\u6587\u4e0d\u540c\u800c\u53d8\u5316\u3002<\/p>\n

    \n
  1. \n

    \u5168\u5c40\u4e0a\u4e0b\u6587<\/strong>\uff1a\u5728\u5168\u5c40\u4f5c\u7528\u57df\u4e2d\uff0cthis<\/code> \u6307\u5411\u5168\u5c40\u5bf9\u8c61\uff08\u5728\u6d4f\u89c8\u5668\u4e2d\u901a\u5e38\u662f window<\/code> \u5bf9\u8c61\uff09\u3002<\/p>\n<\/li>\n

  2. \n

    \u51fd\u6570\u4e0a\u4e0b\u6587<\/strong>\uff1a<\/p>\n

      \n
    • \u5728\u666e\u901a\u51fd\u6570\u4e2d\uff0c\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff08\u975e\u4e25\u683c\u6a21\u5f0f\uff09\uff0cthis<\/code> \u6307\u5411\u5168\u5c40\u5bf9\u8c61\uff1b\u5728\u4e25\u683c\u6a21\u5f0f\u4e0b\uff0c\u6307\u5411 undefined<\/code>\u3002<\/li>\n
    • \u5728\u5bf9\u8c61\u65b9\u6cd5\u4e2d\uff0cthis<\/code> \u6307\u5411\u8c03\u7528\u8be5\u65b9\u6cd5\u7684\u5bf9\u8c61\u3002<\/li>\n<\/ul>\n<\/li>\n
    • \n

      \u6784\u9020\u51fd\u6570<\/strong>\uff1a\u901a\u8fc7 new<\/code> \u5173\u952e\u5b57\u521b\u5efa\u5bf9\u8c61\u5b9e\u4f8b\u65f6\uff0cthis<\/code> \u6307\u5411\u65b0\u521b\u5efa\u7684\u5b9e\u4f8b\u5bf9\u8c61\u3002<\/p>\n<\/li>\n

    • \n

      \u4e8b\u4ef6\u5904\u7406\u51fd\u6570<\/strong>\uff1a\u5728\u4e8b\u4ef6\u5904\u7406\u51fd\u6570\u4e2d\uff0cthis<\/code> \u6307\u5411\u89e6\u53d1\u4e8b\u4ef6\u7684 DOM \u5143\u7d20\u3002<\/p>\n<\/li>\n<\/ol>\n

      \u7406\u89e3 this<\/code> \u7684\u6307\u5411\u662f JavaScript \u4e2d\u91cd\u8981\u7684\u6982\u5ff5\uff0c\u5b83\u6839\u636e\u4e0d\u540c\u7684\u4ee3\u7801\u6267\u884c\u73af\u5883\u548c\u8c03\u7528\u65b9\u5f0f\uff0c\u52a8\u6001\u5730\u6307\u5411\u4e0d\u540c\u7684\u5bf9\u8c61\u3002\u8fd9\u5bf9\u4e8e\u6b63\u786e\u7406\u89e3\u51fd\u6570\u548c\u65b9\u6cd5\u7684\u884c\u4e3a\u81f3\u5173\u91cd\u8981\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

      this \u5728 JavaScript \u4e2d\u662f\u4e00\u4e2a\u5173\u952e\u5b57\uff0c\u5b83\u4ee3\u8868\u5f53\u524d\u6267\u884c\u4e0a\u4e0b\u6587\u4e2d\u7684\u5bf9\u8c61\u3002\u5176\u6307\u5411\u6839\u636e\u51fd\u6570\u8c03\u7528\u65b9\u5f0f\u548c\u4e0a\u4e0b […]<\/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-12283","post","type-post","status-publish","format-standard","hentry","category-javascript"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/12283","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=12283"}],"version-history":[{"count":2,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/12283\/revisions"}],"predecessor-version":[{"id":13581,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/12283\/revisions\/13581"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=12283"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=12283"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=12283"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}