{"id":2298,"date":"2024-11-10T13:54:37","date_gmt":"2024-11-10T05:54:37","guid":{"rendered":"https:\/\/fwq.ai\/blog\/2298\/"},"modified":"2024-11-10T13:54:37","modified_gmt":"2024-11-10T05:54:37","slug":"javascript%e9%97%ad%e5%8c%85%e5%a6%82%e4%bd%95%e8%ae%a9%e5%8c%bf%e5%90%8d%e5%87%bd%e6%95%b0%e8%ae%bf%e9%97%ae%e5%a4%96%e9%83%a8%e5%87%bd%e6%95%b0%e7%9a%84this%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/2298\/","title":{"rendered":"JavaScript\u95ed\u5305\u5982\u4f55\u8ba9\u533f\u540d\u51fd\u6570\u8bbf\u95ee\u5916\u90e8\u51fd\u6570\u7684this\uff1f"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/001\/246\/273\/173071045221156.jpg\" class=\"aligncenter\" title=\"JavaScript\u95ed\u5305\u5982\u4f55\u8ba9\u533f\u540d\u51fd\u6570\u8bbf\u95ee\u5916\u90e8\u51fd\u6570\u7684this\uff1f\u63d2\u56fe\" alt=\"JavaScript\u95ed\u5305\u5982\u4f55\u8ba9\u533f\u540d\u51fd\u6570\u8bbf\u95ee\u5916\u90e8\u51fd\u6570\u7684this\uff1f\u63d2\u56fe\" \/><\/p>\n<p><strong>javascript\u95ed\u5305\u56f0\u5c40\uff1a\u4e13\u5bb6\u89e3\u60d1<\/strong><\/p>\n<p>\u5047\u8bbe\u6211\u4eec\u6709\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/p>\n<\/p>\n<pre>&lt;br&gt;var name = \"the window\";&lt;br&gt;var object = {&lt;\/p&gt;&lt;pre class=\"brush:php;toolbar:false\"&gt;name: \"My Object\",\ngetNameFunc: function() {\n    return function() {\n        return this.name;\n    };\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>};<br \/>alert(object.getnamefunc()());<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<p>\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u4f1a\u51fa\u73b0\u4e00\u4e2a\u95ed\u5305\u4f5c\u7528\u57df\u95ee\u9898\u3002\u533f\u540d\u51fd\u6570\u7684this\u4e00\u822c\u6307\u5411window\u3002<\/p>\n<p>\u4ee3\u7801\u7684\u7b2c\u4e00\u90e8\u5206\uff0cgetnamefunc\u5bf9\u5e94\u7684function\u7684this\u6307\u5411object\u3002\u4f46\u662f\uff0c\u8be5\u51fd\u6570\u8fd4\u56de\u4e86\u53e6\u4e00\u4e2a\u51fd\u6570\uff0c\u5e76\u4e14\u8be5\u51fd\u6570\u662f\u533f\u540d\u7684\uff0c\u8fd9\u610f\u5473\u7740this\u6307\u5411window\u3002<\/p>\n<p>\u4ee3\u7801\u7684\u7b2c\u4e8c\u90e8\u5206\uff0c\u901a\u8fc7\u95ed\u5305\uff0c\u8ba9\u533f\u540d\u51fd\u6570\u5f15\u7528getnamefunc\u7684\u5c40\u90e8\u53d8\u91cfthat\uff08\u5b9e\u9645\u4e0a\u662fgetnamefunc\u7684this\uff09\u3002<\/p>\n<p>\u5f53\u533f\u540d\u51fd\u6570\u6267\u884c\u5e76\u5bfb\u627ethat\u53d8\u91cf\u65f6\uff0c\u5b83\u81ea\u5df1\u6ca1\u6709\u8fd9\u4e2a\u53d8\u91cf\uff0c\u6240\u4ee5\u5b83\u4f1a\u5411\u4e0a\u67e5\u627ethat\u3002\u6b64\u65f6\uff0cthat\u5f15\u7528\u7684\u662fgetnamefunc\u7684this\uff0c\u5373object\u3002<\/p>\n<p>\u56e0\u6b64\uff0calert()\u663e\u793a<strong>my object<\/strong>\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fJavaScript\u95ed\u5305\u5982\u4f55\u8ba9\u533f\u540d\u51fd\u6570\u8bbf\u95ee\u5916\u90e8\u51fd\u6570\u7684this\uff1f\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>javascript\u95ed\u5305\u56f0\u5c40\uff1a\u4e13\u5bb6\u89e3\u60d1 \u5047\u8bbe\u6211\u4eec\u6709\u4ee5\u4e0b\u4ee3\u7801\uff1a &lt;br&gt;var name = &#8220;the window&#8221;;&lt;br&gt;var object = {&lt;\/p&gt;&lt;pre class=&#8221;brush:php;toolbar:false&#8221;&gt;name: &#8220;My Object&#8221;, getNameFunc: function() { return function() { return this.name; }; } \u767b\u5f55\u540e\u590d\u5236 };alert(object.getnamefunc()()); \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u4f1a\u51fa\u73b0\u4e00\u4e2a\u95ed\u5305\u4f5c\u7528\u57df\u95ee\u9898\u3002\u533f\u540d\u51fd\u6570\u7684this\u4e00\u822c\u6307\u5411window\u3002 \u4ee3\u7801\u7684\u7b2c\u4e00\u90e8\u5206\uff0cgetnamefunc\u5bf9\u5e94\u7684function\u7684this\u6307\u5411object\u3002\u4f46\u662f\uff0c\u8be5\u51fd\u6570\u8fd4\u56de\u4e86\u53e6\u4e00\u4e2a\u51fd\u6570\uff0c\u5e76\u4e14\u8be5\u51fd\u6570\u662f\u533f\u540d\u7684\uff0c\u8fd9\u610f\u5473\u7740this\u6307\u5411window\u3002 \u4ee3\u7801\u7684\u7b2c\u4e8c\u90e8\u5206\uff0c\u901a\u8fc7\u95ed\u5305\uff0c\u8ba9\u533f\u540d\u51fd\u6570\u5f15\u7528getnamefunc\u7684\u5c40\u90e8\u53d8\u91cfthat\uff08\u5b9e\u9645\u4e0a\u662fgetnamefunc\u7684this\uff09\u3002 \u5f53\u533f\u540d\u51fd\u6570\u6267\u884c\u5e76\u5bfb\u627ethat\u53d8\u91cf\u65f6\uff0c\u5b83\u81ea\u5df1\u6ca1\u6709\u8fd9\u4e2a\u53d8\u91cf\uff0c\u6240\u4ee5\u5b83\u4f1a\u5411\u4e0a\u67e5\u627ethat\u3002\u6b64\u65f6\uff0cthat\u5f15\u7528\u7684\u662fgetnamefunc\u7684this\uff0c\u5373object\u3002 \u56e0\u6b64\uff0calert()\u663e\u793amy object\u3002 \u4ee5\u4e0a\u5c31\u662fJavaScript\u95ed\u5305\u5982\u4f55\u8ba9\u533f\u540d\u51fd\u6570\u8bbf\u95ee\u5916\u90e8\u51fd\u6570\u7684this\uff1f\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-2298","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/2298","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=2298"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/2298\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=2298"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=2298"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=2298"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}