{"id":12198,"date":"2023-11-28T22:46:24","date_gmt":"2023-11-28T14:46:24","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=12198"},"modified":"2023-11-29T23:24:11","modified_gmt":"2023-11-29T15:24:11","slug":"javascript-zhong-shen-me-shi-jian-tou-han-shu","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/11\/28\/javascript-zhong-shen-me-shi-jian-tou-han-shu\/","title":{"rendered":"JavaScript \u4e2d\u4ec0\u4e48\u662f\u7bad\u5934\u51fd\u6570\uff1f"},"content":{"rendered":"<p>\u7bad\u5934\u51fd\u6570\u662f ES6\uff08ECMAScript 2015\uff09\u5f15\u5165\u7684\u65b0\u7279\u6027\uff0c\u5b83\u662f\u4e00\u79cd\u66f4\u7b80\u6d01\u7684\u51fd\u6570\u58f0\u660e\u65b9\u5f0f\uff0c\u5177\u6709\u4ee5\u4e0b\u7279\u70b9\uff1a<\/p>\n<ol>\n<li>\n<p><strong>\u8bed\u6cd5\u7b80\u6d01<\/strong>\uff1a\u4f7f\u7528\u7bad\u5934\u51fd\u6570\u53ef\u4ee5\u66f4\u7b80\u6d01\u5730\u5b9a\u4e49\u51fd\u6570\u3002<\/p>\n<pre><code class=\"language-javascript\">\/\/ \u666e\u901a\u51fd\u6570\u58f0\u660e\nfunction add(a, b) {\n    return a + b;\n}\n\n\/\/ \u7bad\u5934\u51fd\u6570\nconst add = (a, b) =&gt; a + b;\n<\/code><\/pre>\n<\/li>\n<li>\n<p><strong>\u6ca1\u6709\u81ea\u5df1\u7684 this<\/strong>\uff1a\u7bad\u5934\u51fd\u6570\u6ca1\u6709\u81ea\u5df1\u7684 <code>this<\/code>\uff0c\u5b83\u4f1a\u6355\u83b7\u6240\u5728\u4e0a\u4e0b\u6587\u7684 <code>this<\/code> \u503c\uff0c\u5e76\u4e14\u4e0d\u80fd\u4f7f\u7528 <code>call()<\/code>\u3001<code>apply()<\/code>\u3001<code>bind()<\/code> \u65b9\u6cd5\u6539\u53d8 <code>this<\/code> \u7684\u6307\u5411\u3002<\/p>\n<pre><code class=\"language-javascript\">const obj = {\n    value: 42,\n    getValue: function() {\n        return () =&gt; this.value;\n    }\n};\nconsole.log(obj.getValue()()); \/\/ \u8f93\u51fa 42\n<\/code><\/pre>\n<\/li>\n<li>\n<p><strong>\u7b80\u5316\u7684\u8fd4\u56de\u8bed\u53e5<\/strong>\uff1a\u5982\u679c\u7bad\u5934\u51fd\u6570\u4f53\u5185\u53ea\u6709\u4e00\u884c\u8868\u8fbe\u5f0f\uff0c\u5e76\u4e14\u4e0d\u9700\u8981\u591a\u884c\u4ee3\u7801\u6216\u590d\u6742\u7684\u903b\u8f91\uff0c\u53ef\u4ee5\u7701\u7565\u5927\u62ec\u53f7\u548c <code>return<\/code> \u5173\u952e\u5b57\u3002<\/p>\n<pre><code class=\"language-javascript\">\/\/ \u7bad\u5934\u51fd\u6570\u8fd4\u56de\u5bf9\u8c61\u5b57\u9762\u91cf\nconst getPerson = () =&gt; ({ name: 'Alice', age: 25 });\n<\/code><\/pre>\n<\/li>\n<li>\n<p><strong>\u66f4\u7b80\u6d01\u7684\u53c2\u6570\u58f0\u660e<\/strong>\uff1a\u5f53\u51fd\u6570\u53ea\u6709\u4e00\u4e2a\u53c2\u6570\u65f6\uff0c\u53ef\u4ee5\u7701\u7565\u62ec\u53f7\u3002<\/p>\n<pre><code class=\"language-javascript\">const printValue = value =&gt; console.log(value);\n<\/code><\/pre>\n<\/li>\n<\/ol>\n<p>\u7bad\u5934\u51fd\u6570\u901a\u5e38\u5728\u56de\u8c03\u51fd\u6570\u548c\u7b80\u5355\u7684\u51fd\u6570\u8868\u8fbe\u5f0f\u4e2d\u4f7f\u7528\uff0c\u5b83\u63d0\u4f9b\u4e86\u66f4\u7b80\u6d01\u3001\u66f4\u6613\u8bfb\u7684\u8bed\u6cd5\u5f62\u5f0f\uff0c\u4f46\u4e5f\u9700\u8981\u6ce8\u610f\u5176\u7279\u6b8a\u7684 <code>this<\/code> \u7ed1\u5b9a\u89c4\u5219\u4ee5\u53ca\u9002\u7528\u573a\u666f\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u7bad\u5934\u51fd\u6570\u662f ES6\uff08ECMAScript 2015\uff09\u5f15\u5165\u7684\u65b0\u7279\u6027\uff0c\u5b83\u662f\u4e00\u79cd\u66f4\u7b80\u6d01\u7684\u51fd\u6570\u58f0\u660e\u65b9\u5f0f\uff0c\u5177\u6709\u4ee5\u4e0b\u7279\u70b9\uff1a [&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-12198","post","type-post","status-publish","format-standard","hentry","category-javascript"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/12198","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=12198"}],"version-history":[{"count":2,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/12198\/revisions"}],"predecessor-version":[{"id":13591,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/12198\/revisions\/13591"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=12198"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=12198"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=12198"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}