{"id":12271,"date":"2023-11-28T22:48:45","date_gmt":"2023-11-28T14:48:45","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=12271"},"modified":"2023-11-29T23:15:07","modified_gmt":"2023-11-29T15:15:07","slug":"javascript-zhong-jian-shu-xiathis-he-ding-yi-shu-x","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/11\/28\/javascript-zhong-jian-shu-xiathis-he-ding-yi-shu-x\/","title":{"rendered":"JavaScript \u4e2d\u7b80\u8ff0\u4e0b this \u548c\u5b9a\u4e49\u5c5e\u6027\u548c\u65b9\u6cd5\u7684\u65f6\u5019\u6709\u4ec0\u4e48\u533a\u522b\uff1fPrototype\uff1f"},"content":{"rendered":"<p><code>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<ol>\n<li>\n<p><strong><code>this<\/code> \u5173\u952e\u5b57<\/strong>\uff1a<\/p>\n<ul>\n<li><code>this<\/code> \u7684\u503c\u53d6\u51b3\u4e8e\u51fd\u6570\u7684\u8c03\u7528\u65b9\u5f0f\u3002<\/li>\n<li>\u5728\u5168\u5c40\u4f5c\u7528\u57df\u4e2d\uff0c<code>this<\/code> \u6307\u5411\u5168\u5c40\u5bf9\u8c61\uff08\u6d4f\u89c8\u5668\u73af\u5883\u4e0b\u4e3a <code>window<\/code> \u5bf9\u8c61\uff09\u3002<\/li>\n<li>\u5728\u51fd\u6570\u5185\u90e8\uff0c\u9ed8\u8ba4\u60c5\u51b5\u4e0b\uff08\u975e\u4e25\u683c\u6a21\u5f0f\uff09\uff0c<code>this<\/code> \u6307\u5411\u5168\u5c40\u5bf9\u8c61\uff1b\u5728\u4e25\u683c\u6a21\u5f0f\u4e0b\uff0c\u6307\u5411 <code>undefined<\/code>\u3002<\/li>\n<li>\u5728\u5bf9\u8c61\u65b9\u6cd5\u4e2d\uff0c<code>this<\/code> \u6307\u5411\u8c03\u7528\u8be5\u65b9\u6cd5\u7684\u5bf9\u8c61\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<p><strong>\u5b9a\u4e49\u5c5e\u6027\u548c\u65b9\u6cd5<\/strong>\uff1a<\/p>\n<ul>\n<li>\u5728\u5bf9\u8c61\u5b57\u9762\u91cf\u4e2d\uff0c\u53ef\u4ee5\u76f4\u63a5\u901a\u8fc7\u8d4b\u503c\u6765\u5b9a\u4e49\u5bf9\u8c61\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u3002<\/li>\n<\/ul>\n<pre><code class=\"language-javascript\">const obj = {\n    name: 'Alice', \/\/ \u5b9a\u4e49\u5c5e\u6027\n    greet: function() {\n        console.log(`Hello, ${this.name}`); \/\/ \u5b9a\u4e49\u65b9\u6cd5\n    }\n};\n<\/code><\/pre>\n<ul>\n<li>\u4f7f\u7528 <code>this<\/code> \u5173\u952e\u5b57\u5728\u6784\u9020\u51fd\u6570\u4e2d\u5b9a\u4e49\u5c5e\u6027\u548c\u65b9\u6cd5\u3002<\/li>\n<\/ul>\n<pre><code class=\"language-javascript\">function Person(name) {\n    this.name = name; \/\/ \u5b9a\u4e49\u5c5e\u6027\n    this.greet = function() {\n        console.log(`Hello, ${this.name}`); \/\/ \u5b9a\u4e49\u65b9\u6cd5\n    };\n}\n<\/code><\/pre>\n<\/li>\n<li>\n<p><strong>Prototype \u539f\u578b<\/strong>\uff1a<\/p>\n<ul>\n<li><code>prototype<\/code> \u662f\u51fd\u6570\u5bf9\u8c61\u7279\u6709\u7684\u5c5e\u6027\uff0c\u5728\u51fd\u6570\u88ab\u521b\u5efa\u65f6\u81ea\u52a8\u6dfb\u52a0\u3002<\/li>\n<li>\u901a\u8fc7\u539f\u578b\u53ef\u4ee5\u5171\u4eab\u65b9\u6cd5\u548c\u5c5e\u6027\uff0c\u907f\u514d\u5728\u6bcf\u4e2a\u5b9e\u4f8b\u4e2d\u91cd\u590d\u521b\u5efa\u3002<\/li>\n<\/ul>\n<pre><code class=\"language-javascript\">function Person(name) {\n    this.name = name;\n}\nPerson.prototype.greet = function() {\n    console.log(`Hello, ${this.name}`);\n};\n<\/code><\/pre>\n<ul>\n<li>\u4f7f\u7528\u539f\u578b\u6765\u5b9a\u4e49\u65b9\u6cd5\u53ef\u4ee5\u5728\u6240\u6709\u5b9e\u4f8b\u4e4b\u95f4\u5171\u4eab\uff0c\u8282\u7701\u5185\u5b58\u5e76\u63d0\u9ad8\u6027\u80fd\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<p>\u5728 JavaScript \u4e2d\uff0c<code>this<\/code> \u5173\u952e\u5b57\u548c\u76f4\u63a5\u5b9a\u4e49\u5c5e\u6027\u548c\u65b9\u6cd5\u4ee5\u53ca\u4f7f\u7528\u539f\u578b\u5b9a\u4e49\u65b9\u6cd5\u662f\u4e0d\u540c\u7684\u6982\u5ff5\u3002<code>this<\/code> \u7528\u4e8e\u6307\u5411\u5f53\u524d\u6267\u884c\u4e0a\u4e0b\u6587\u7684\u5bf9\u8c61\uff0c\u800c\u5b9a\u4e49\u5c5e\u6027\u548c\u65b9\u6cd5\u4ee5\u53ca\u4f7f\u7528\u539f\u578b\u5b9a\u4e49\u65b9\u6cd5\u662f\u5b9a\u4e49\u5bf9\u8c61\u548c\u65b9\u6cd5\u7684\u65b9\u5f0f\u3002\u6df1\u5165\u7406\u89e3\u8fd9\u4e9b\u6982\u5ff5\u5bf9\u4e8e\u6b63\u786e\u4f7f\u7528\u548c\u8bbe\u8ba1 JavaScript \u4ee3\u7801\u975e\u5e38\u91cd\u8981\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>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 [&hellip;]<\/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-12271","post","type-post","status-publish","format-standard","hentry","category-javascript"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/12271","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=12271"}],"version-history":[{"count":2,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/12271\/revisions"}],"predecessor-version":[{"id":13582,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/12271\/revisions\/13582"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=12271"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=12271"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=12271"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}