{"id":2001,"date":"2025-10-14T18:30:15","date_gmt":"2025-10-14T10:30:15","guid":{"rendered":"https:\/\/womeifei.cn\/?p=2001"},"modified":"2025-10-14T18:30:15","modified_gmt":"2025-10-14T10:30:15","slug":"%e6%89%8b%e5%86%99bind%e5%87%bd%e6%95%b0","status":"publish","type":"post","link":"https:\/\/womeifei.cn\/index.php\/2025\/10\/14\/%e6%89%8b%e5%86%99bind%e5%87%bd%e6%95%b0\/","title":{"rendered":"\u624b\u5199bind\u51fd\u6570"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">\u6ce8\u610f\u4e8b\u9879<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">1.\u5728\u54ea\u5199bind\u51fd\u6570?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u56e0\u4e3a\u662f\u6240\u6709\u51fd\u6570\u90fd\u5177\u6709\u7684\u65b9\u6cd5 \u8981\u5728<strong>\u539f\u578b<\/strong>\u4e0a\u53bb\u5199<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Function.prototype.myBind = function (ctx, ...args) {\n    \/\/............\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">2.\u5982\u4f55\u505a\u5230\u8fd4\u56de\u65b0\u51fd\u6570\u5e76\u8c03\u7528\u539f\u51fd\u6570?<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd4\u56de\u4e00\u4e2a\u51fd\u6570\u5373\u53ef  \u53ef\u4ee5\u628a\u65b0\u51fd\u6570 \u548c bind\u51fd\u6570\u7684\u53c2\u6570\u7edf\u4e00\u6536\u96c6\u8d77\u6765 \u4f9b\u540e\u7eed\u4f7f\u7528<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8c01\u8c03\u7528\u4e86myBind this\u5c31\u6307\u5411\u8c01  fn.myBind  \u5219\u5728myBind\u51fd\u6570\u4e2dthis\u6307\u5411fn<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6240\u4ee5\u53ef\u4ee5\u8bb0\u5f55\u8fd9\u4e2athis (\u539f\u51fd\u6570) \u518d\u53bb\u8c03\u7528<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>const fn = this<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">3.\u4f7f\u7528new\u8c03\u7528\u65f6\u7684\u95ee\u9898<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b98\u65b9bind\u51fd\u6570 \u4f7f\u7528new\u8c03\u7528 \u8fd4\u56de\u7684\u662f\u4ee5fn\u4f5c\u4e3a\u6784\u9020\u51fd\u6570\u521b\u5efa\u7684\u5bf9\u8c61<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f46\u81ea\u5df1\u5199\u7684\u4f1a\u8fd4\u56de  \u8fd4\u56de\u51fd\u6570\u4f5c\u4e3a\u6784\u9020\u51fd\u6570\u521b\u5efa\u7684\u5bf9\u8c61<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6240\u4ee5\u8981\u52a0\u4e0a\u5224\u65ad \u662f\u5426\u901a\u8fc7new\u8c03\u7528\u7684(new.target \u662f\u5426\u6709\u503c)<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>if (new.target) {\n    return new fn(...callArgs)\n}\nelse {\n    return fn.apply(ctx, callArgs)\n}<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u6700\u7ec8\u4ee3\u7801<\/h2>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/womeifei.cn\/wp-content\/uploads\/2025\/10\/image-9-628x1024.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"628\" height=\"1024\" data-original=\"https:\/\/womeifei.cn\/wp-content\/uploads\/2025\/10\/image-9-628x1024.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-2006\" style=\"width:840px;height:auto\"  sizes=\"auto, (max-width: 628px) 100vw, 628px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6ce8\u610f\u4e8b\u9879 1.\u5728\u54ea\u5199bind\u51fd\u6570? 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