{"id":507,"date":"2024-11-14T17:09:10","date_gmt":"2024-11-14T09:09:10","guid":{"rendered":"https:\/\/womeifei.cn\/?p=507"},"modified":"2024-11-14T17:09:10","modified_gmt":"2024-11-14T09:09:10","slug":"js%e8%bf%9b%e9%98%b6-%e5%8e%9f%e5%9e%8b%e9%93%be","status":"publish","type":"post","link":"https:\/\/womeifei.cn\/index.php\/2024\/11\/14\/js%e8%bf%9b%e9%98%b6-%e5%8e%9f%e5%9e%8b%e9%93%be\/","title":{"rendered":"JS\u8fdb\u9636-\u539f\u578b\u94fe"},"content":{"rendered":"\n<p class=\"has-large-font-size\"><strong>\u4ec0\u4e48\u662f\u539f\u578b?<\/strong><\/p>\n\n\n\n<p>JavaScript\u89c4\u5b9a \u6bcf\u4e00\u4e2a\u6784\u9020\u51fd\u6570\u90fd\u6709\u4e00\u4e2a<strong>prototype<\/strong>\u5c5e\u6027 \u6307\u5411\u53e6\u4e00\u4e2a\u5bf9\u8c61 \u6211\u4eec\u4e5f\u79f0\u4e3a\u539f\u578b\u5bf9\u8c61 \u8fd9\u4e2a\u5bf9\u8c61\u53ef\u4ee5\u6302\u8f7d\u51fd\u6570 <\/p>\n\n\n\n<p>\u8fd9\u6837\u6240\u6709\u6839\u636e\u8fd9\u4e2a\u6784\u9020\u51fd\u6570\u5b9e\u4f8b\u5316\u51fa\u6765\u7684\u5bf9\u8c61\u90fd\u53ef\u4ee5\u8c03\u7528\u8fd9\u4e2a\u51fd\u6570 (<strong>\u4e0d\u4f1a\u4ea7\u751f\u8d44\u6e90\u6d6a\u8d39<\/strong>) \u4e0b\u56fe\u7b80\u5355\u8bf4\u660e\u4e86\u4e3a\u4ec0\u4e48\u4e4b\u524d\u7684\u6784\u9020\u51fd\u6570\u65b9\u6cd5\u4f1a\u5b58\u5728\u8d44\u6e90\u6d6a\u8d39<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/womeifei.cn\/wp-content\/uploads\/2024\/11\/image-94-1024x360.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"360\" data-original=\"https:\/\/womeifei.cn\/wp-content\/uploads\/2024\/11\/image-94-1024x360.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-508\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<p>\u5229\u7528\u539f\u578b\u5bf9\u8c61 \u6211\u4eec\u53ef\u4ee5\u5c06\u516c\u5171\u7684\u5c5e\u6027\u5199\u5728\u6784\u9020\u51fd\u6570\u91cc \u5c06\u516c\u5171\u7684\u65b9\u6cd5\u5199\u5728\u539f\u578b\u5bf9\u8c61\u8eab\u4e0a <\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/womeifei.cn\/wp-content\/uploads\/2024\/11\/image-95-1024x498.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"498\" data-original=\"https:\/\/womeifei.cn\/wp-content\/uploads\/2024\/11\/image-95-1024x498.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-509\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong>this\u7684\u6307\u5411<\/strong><\/p>\n\n\n\n<p><strong>\u6784\u9020\u51fd\u6570\u548c\u539f\u578b\u5bf9\u8c61<\/strong>\u4e2d\u7684<strong>this<\/strong>\u90fd\u6307<strong>\u5411\u5b9e\u4f8b\u5316\u7684\u5bf9\u8c61<\/strong><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong>constructor\u5c5e\u6027<\/strong><\/p>\n\n\n\n<p>\u5728\u4e0a\u4e00\u5f20\u56fe\u7247\u4e2d \u6211\u4eec\u770b\u5230\u5728\u539f\u578b\u5bf9\u8c61\u4e2d\u5305\u542b\u4e86\u4e00\u4e2aconstruct\u5c5e\u6027 \u90a3\u4e48\u8fd9\u4e2a\u5c5e\u6027\u6709\u4ec0\u4e48\u4f5c\u7528\u5462?<\/p>\n\n\n\n<p>\u7b54\u6848\u662f\u901a\u8fc7constructor\u5c5e\u6027\u518d<strong>\u91cd\u65b0\u6307\u56de\u521b\u9020\u8fd9\u4e2a\u539f\u578b\u5bf9\u8c61\u7684\u6784\u9020\u51fd\u6570<\/strong><\/p>\n\n\n\n<p>\u5217\u4e3e\u4e00\u4e2a\u4f7f\u7528\u573a\u666f:<\/p>\n\n\n\n<p>\u5982\u679c\u6709\u591a\u4e2a\u5bf9\u8c61\u7684\u65b9\u6cd5 ,\u53ef\u4ee5\u7ed9\u539f\u578b\u5bf9\u8c61\u91c7\u53d6\u5bf9\u8c61\u5f62\u5f0f\u8d4b\u503c ,\u4f46\u8fd9\u6837\u5c31\u4f1a\u8986\u76d6\u6784\u9020\u51fd\u6570\u539f\u578b\u5bf9\u8c61\u539f\u6765\u7684\u5185\u5bb9,\u8fd9\u6837\u4fee\u6539\u540e\u7684\u539f\u578b\u5bf9\u8c61constructor\u5c31\u4e0d\u518d\u6307\u5411\u5f53\u524d\u6784\u9020\u51fd\u6570\u4e86 \u6b64\u65f6\u6211\u4eec\u53ef\u4ee5\u5728\u4fee\u6539\u540e\u7684\u539f\u578b\u5bf9\u8c61\u4e2d\u6dfb\u52a0\u4e00\u4e2aconstructor\u6307\u5411\u539f\u6765\u7684\u6784\u9020\u51fd\u6570<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/womeifei.cn\/wp-content\/uploads\/2024\/11\/image-96.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"978\" height=\"448\" data-original=\"https:\/\/womeifei.cn\/wp-content\/uploads\/2024\/11\/image-96.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-510\"  sizes=\"auto, (max-width: 978px) 100vw, 978px\" \/><\/div><\/figure>\n\n\n\n<p>\u5982\u56fe\u6240\u793a \u8d4b\u503c\u540econstructor\u4e0d\u518d\u6307\u5411\u6784\u9020\u51fd\u6570 <strong>\u6211\u4eec\u9700\u8981\u91cd\u65b0\u8fdb\u884c\u6307\u5411<\/strong>(Just Add One Sentence)<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/womeifei.cn\/wp-content\/uploads\/2024\/11\/image-97.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"963\" height=\"469\" data-original=\"https:\/\/womeifei.cn\/wp-content\/uploads\/2024\/11\/image-97.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-511\"  sizes=\"auto, (max-width: 963px) 100vw, 963px\" \/><\/div><\/figure>\n\n\n\n<p>\u6ce8\u610f:<\/p>\n\n\n\n<p><strong>\u6bcf\u4e2a\u539f\u578b\u5bf9\u8c61\u91cc\u90fd\u6709\u4e00\u4e2aconstructor\u5c5e\u6027 \u6307\u5411\u8be5\u539f\u578b\u5bf9\u8c61\u7684\u6784\u9020\u51fd\u6570<\/strong><\/p>\n\n\n\n<p><\/p>\n\n\n\n<p class=\"has-large-font-size\">\u4e3a\u4ec0\u4e48\u5b9e\u4f8b\u5316\u7684\u5bf9\u8c61\u53ef\u4ee5\u8c03\u7528\u539f\u578b\u5bf9\u8c61\u4e0a\u6302\u8f7d\u7684\u51fd\u6570?<\/p>\n\n\n\n<p class=\"has-large-font-size\"><strong>\u5bf9\u8c61\u539f\u578b<\/strong><\/p>\n\n\n\n<p>\u6bcf\u4e00\u4e2a\u5bf9\u8c61\u90fd\u4f1a\u6709\u4e00\u4e2a\u5c5e\u6027__proto__\/[ [ prototype ] ] \u6307\u5411\u6784\u9020\u51fd\u6570\u7684prototype\u539f\u578b\u5bf9\u8c61<\/p>\n\n\n\n<p>\u56e0\u4e3a\u6709\u5bf9\u8c61\u539f\u578b\u7684\u6307\u5411 \u4f7f\u5f97\u5b9e\u4f8b\u5316\u5bf9\u8c61\u4e0e\u539f\u578b\u5bf9\u8c61\u4e0a\u7684\u51fd\u6570\u4ea7\u751f\u4e86\u8054\u7cfb<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/womeifei.cn\/wp-content\/uploads\/2024\/11\/image-98.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"901\" height=\"190\" data-original=\"https:\/\/womeifei.cn\/wp-content\/uploads\/2024\/11\/image-98.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-512\"  sizes=\"auto, (max-width: 901px) 100vw, 901px\" \/><\/div><\/figure>\n\n\n\n<p class=\"has-large-font-size\"><strong>\u6784\u9020\u51fd\u6570 \u5b9e\u4f8b\u5bf9\u8c61 \u539f\u578b\u5bf9\u8c61\u4e4b\u95f4\u7684\u5173\u7cfb<\/strong><\/p>\n\n\n\n<p>\u4ecb\u7ecd\u5b8c\u5bf9\u8c61\u539f\u578b\u4e4b\u540e \u6211\u4eec\u53ef\u4ee5\u53d1\u73b0<strong>\u6784\u9020\u51fd\u6570,\u5b9e\u4f8b\u5316\u5bf9\u8c61\u548c\u539f\u578b\u5bf9\u8c61\u8fd9\u4e09\u8005\u4e4b\u95f4\u6709\u7740\u5bc6\u5207\u7684\u5173\u7cfb<\/strong><\/p>\n\n\n\n<p>\u6784\u9020\u51fd\u6570\u5b58\u5728\u4e00\u4e2aprototype\u5c5e\u6027\u6307\u5411\u539f\u578b\u5bf9\u8c61<\/p>\n\n\n\n<p>\u539f\u578b\u5bf9\u8c61\u5b58\u5728construct\u5c5e\u6027\u6307\u5411\u6784\u9020\u51fd\u6570<\/p>\n\n\n\n<p>\u6784\u9020\u51fd\u6570\u5b9e\u4f8b\u5316\u4e00\u4e2a\u5177\u4f53\u5bf9\u8c61<\/p>\n\n\n\n<p>\u8fd9\u4e2a\u5177\u4f53\u5bf9\u8c61\u5b58\u5728__proto__\u5c5e\u6027\u6307\u5411\u539f\u578b\u5bf9\u8c61<\/p>\n\n\n\n<p>\u53ef\u4ee5\u7528\u4e0b\u56fe\u8868\u793a\u4e09\u8005\u4e4b\u95f4\u7684\u5173\u7cfb<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/womeifei.cn\/wp-content\/uploads\/2024\/11\/image-99.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"880\" height=\"486\" data-original=\"https:\/\/womeifei.cn\/wp-content\/uploads\/2024\/11\/image-99.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-513\"  sizes=\"auto, (max-width: 880px) 100vw, 880px\" \/><\/div><\/figure>\n\n\n\n<p class=\"has-text-align-center has-x-large-font-size\"><strong>\u539f\u578b\u94fe<\/strong><\/p>\n\n\n\n<p class=\"has-medium-font-size\">\u524d\u9762\u94fa\u57ab\u4e86\u8fd9\u4e48\u591a\u77e5\u8bc6\u5c31\u662f\u4e3a\u4e86\u539f\u578b\u94fe\u505a\u94fa\u57ab<\/p>\n\n\n\n<p><strong>\u601d\u8003<\/strong>     <\/p>\n\n\n\n<p>\u65e2\u7136\u6bcf\u4e2a\u5bf9\u8c61\u90fd\u4f1a\u6709\u4e00\u4e2a__proto__\u5c5e\u6027 \u6307\u5411\u5176\u6784\u9020\u51fd\u6570\u7684\u539f\u578b\u5bf9\u8c61 \u90a3\u4e48\u6211\u4eec\u7684\u539f\u578b\u5bf9\u8c61\u4e5f\u662f\u4e00\u4e2a\u5bf9\u8c61 \u5e94\u8be5\u4e5f\u4f1a\u6307\u5411\u5176\u6784\u9020\u51fd\u6570\u7684\u539f\u578b\u5bf9\u8c61 \u800c\u4e00\u4e2a\u5bf9\u8c61\u6b63\u662f\u7531Object \u5b9e\u4f8b\u5316\u800c\u6210\u7684 \u6240\u4ee5\u6211\u4eec\u7684\u539f\u578b\u5bf9\u8c61__proto__\u5c31\u53c8\u4f1a\u6307\u5411Object.prototype  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