{"id":1988,"date":"2025-10-13T22:19:31","date_gmt":"2025-10-13T14:19:31","guid":{"rendered":"https:\/\/womeifei.cn\/?p=1988"},"modified":"2025-10-13T22:28:07","modified_gmt":"2025-10-13T14:28:07","slug":"this%e7%9a%84%e6%8c%87%e5%90%91","status":"publish","type":"post","link":"https:\/\/womeifei.cn\/index.php\/2025\/10\/13\/this%e7%9a%84%e6%8c%87%e5%90%91\/","title":{"rendered":"this\u7684\u6307\u5411"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">1.\u5168\u5c40\u4f5c\u7528\u57df\u4e2d\u7684this<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u901a\u5e38\u5728\u5168\u5c40\u4f5c\u7528\u57df\u4e2d\uff0cthis \u6307\u5411\u5168\u5c40\u5bf9\u8c61\uff0c\u5728\u6d4f\u89c8\u5668\u73af\u5883\u4e2d\u662f window \u5bf9\u8c61<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">2.\u51fd\u6570\u5185\u90e8\u7684this<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u51fd\u6570\u4f5c\u4e3a\u666e\u901a\u51fd\u6570\u8c03\u7528\u65f6\uff0cthis \u6307\u5411\u5168\u5c40\u5bf9\u8c61(\u5728\u4e25\u683c\u6a21\u5f0f\u4e0b\u4e3a undefined)<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u51fd\u6570\u4f5c\u4e3a\u5bf9\u8c61\u7684\u65b9\u6cd5\u8c03\u7528\u65f6\uff0cthis \u6307\u5411\u8c03\u7528\u8be5\u65b9\u6cd5\u7684\u5bf9\u8c61<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">3.\u6784\u9020\u51fd\u6570\u4e2d\u7684this<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53\u51fd\u6570\u4f5c\u4e3a\u6784\u9020\u51fd\u6570\u4f7f\u7528\u65f6\uff0cthis \u6307\u5411\u65b0\u521b\u5efa\u7684\u5bf9\u8c61<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">4.\u7bad\u5934\u51fd\u6570\u4e2d\u7684this<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u7bad\u5934\u51fd\u6570\u6ca1\u6709\u81ea\u5df1\u7684 this\uff0c\u5b83\u7684 this \u7ee7\u627f\u81ea\u5916\u5c42\u51fd\u6570\u7684 this<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">5.\u4f7f\u7528 call\u3001apply \u548c bind \u6539\u53d8 this \u6307\u5411<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">call \u548c apply \u662f\u5728\u8c03\u7528\u51fd\u6570\u65f6\u6307\u5b9a this \u7684\u503c\uff0c\u5e76\u4e14\u53ef\u4ee5\u4f20\u9012\u53c2\u6570<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">bind \u662f\u521b\u5efa\u4e00\u4e2a\u65b0\u7684\u51fd\u6570\uff0c\u5728\u8c03\u7528\u65f6 this \u7684\u503c\u4f1a\u88ab\u7ed1\u5b9a\u5230\u6307\u5b9a\u7684\u503c\u4e0a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Example:<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">call(\u9010\u4e2a\u4f20\u9012\u53c2\u6570), apply(\u6570\u7ec4\u4f20\u9012\u53c2\u6570) \u7acb\u5373\u8c03\u7528 <\/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\/2025\/10\/image-4-1024x398.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"398\" data-original=\"https:\/\/womeifei.cn\/wp-content\/uploads\/2025\/10\/image-4-1024x398.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-1990\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\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\/2025\/10\/image-6-1024x468.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"468\" data-original=\"https:\/\/womeifei.cn\/wp-content\/uploads\/2025\/10\/image-6-1024x468.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-1993\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">bind\u8fd4\u56de\u4e00\u4e2a\u65b0\u51fd\u6570 <\/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\/2025\/10\/image-5-1024x503.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"503\" data-original=\"https:\/\/womeifei.cn\/wp-content\/uploads\/2025\/10\/image-5-1024x503.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-1992\"  sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>1.\u5168\u5c40\u4f5c\u7528\u57df\u4e2d\u7684this \u901a\u5e38\u5728\u5168\u5c40\u4f5c\u7528\u57df\u4e2d\uff0cthis \u6307\u5411\u5168\u5c40\u5bf9\u8c61\uff0c\u5728\u6d4f\u89c8\u5668\u73af\u5883\u4e2d\u662f window \u5bf9\u8c61  [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10,1,46],"tags":[],"class_list":["post-1988","post","type-post","status-publish","format-standard","hentry","category-javascript","category-1","category-46"],"_links":{"self":[{"href":"https:\/\/womeifei.cn\/index.php\/wp-json\/wp\/v2\/posts\/1988","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/womeifei.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/womeifei.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/womeifei.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/womeifei.cn\/index.php\/wp-json\/wp\/v2\/comments?post=1988"}],"version-history":[{"count":2,"href":"https:\/\/womeifei.cn\/index.php\/wp-json\/wp\/v2\/posts\/1988\/revisions"}],"predecessor-version":[{"id":1994,"href":"https:\/\/womeifei.cn\/index.php\/wp-json\/wp\/v2\/posts\/1988\/revisions\/1994"}],"wp:attachment":[{"href":"https:\/\/womeifei.cn\/index.php\/wp-json\/wp\/v2\/media?parent=1988"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/womeifei.cn\/index.php\/wp-json\/wp\/v2\/categories?post=1988"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/womeifei.cn\/index.php\/wp-json\/wp\/v2\/tags?post=1988"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}