{"id":3819,"date":"2024-11-10T14:52:26","date_gmt":"2024-11-10T06:52:26","guid":{"rendered":"https:\/\/fwq.ai\/blog\/3819\/"},"modified":"2024-11-10T14:52:26","modified_gmt":"2024-11-10T06:52:26","slug":"%e5%a6%82%e4%bd%95%e5%9c%a8-javascript-%e4%b8%ad%e4%bd%bf%e7%94%a8-apply-%e5%92%8c-call-%e6%96%b9%e6%b3%95%e6%9b%b4%e6%94%b9-this-%e6%8c%87%e5%90%91%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/3819\/","title":{"rendered":"\u5982\u4f55\u5728 JavaScript \u4e2d\u4f7f\u7528 apply() \u548c call() \u65b9\u6cd5\u66f4\u6539 this \u6307\u5411\uff1f"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/001\/246\/273\/173114766343488.jpg\" class=\"aligncenter\" title=\"\u5982\u4f55\u5728 JavaScript \u4e2d\u4f7f\u7528 apply() \u548c call() \u65b9\u6cd5\u66f4\u6539 this \u6307\u5411\uff1f\u63d2\u56fe\" alt=\"\u5982\u4f55\u5728 JavaScript \u4e2d\u4f7f\u7528 apply() \u548c call() \u65b9\u6cd5\u66f4\u6539 this \u6307\u5411\uff1f\u63d2\u56fe\" \/><\/p>\n<p><strong>JavaScript \u4e2d\u66f4\u6539 this \u6307\u5411\u7684\u95ee\u9898<\/strong><\/p>\n<p>\u5728 JavaScript \u4e2d\uff0c\u51fd\u6570\u4e2d\u7684 this \u5173\u952e\u5b57\u901a\u5e38\u6307\u5411\u51fd\u6570\u88ab\u8c03\u7528\u7684\u5bf9\u8c61\u3002\u4f46\u662f\uff0c\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u5e0c\u671b\u5c06 this \u6307\u5411\u4fee\u6539\u6210\u53e6\u4e00\u4e2a\u5bf9\u8c61\u3002<\/p>\n<p><strong>apply \u548c call<\/strong><\/p>\n<p>apply() \u548c call() \u65b9\u6cd5\u53ef\u4ee5\u7528\u4e8e\u66f4\u6539\u51fd\u6570\u7684 this \u6307\u5411\u3002\u8fd9\u4e24\u4e2a\u65b9\u6cd5\u90fd\u63a5\u6536\u4e24\u4e2a\u53c2\u6570\uff1a<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<ul>\n<li>\u7b2c\u4e00\u4e2a\u53c2\u6570\u662f\u5e0c\u671b\u4fee\u6539\u6210\u51fd\u6570 this \u6307\u5411\u7684\u5bf9\u8c61\u3002<\/li>\n<li>\u7b2c\u4e8c\u4e2a\u53c2\u6570\u662f\u4e00\u4e2a\u53c2\u6570\u6570\u7ec4\uff0c\u5c06\u4f20\u9012\u7ed9\u8be5\u51fd\u6570\u3002<\/li>\n<\/ul>\n<p><strong>\u9632\u6296\u51fd\u6570\u4e2d\u7684 apply<\/strong><\/p>\n<p>\u7ed9\u5b9a\u7684\u9632\u6296\u51fd\u6570\u4f7f\u7528 apply() \u65b9\u6cd5\u6765\u4fee\u6539 this \u6307\u5411\u3002<\/p>\n<p>\u5728\u5185\u90e8\u51fd\u6570\u4e2d\uff0cthis \u6307\u5411\u88ab\u8bbe\u7f6e\u4e3a\u51fd\u6570\u88ab\u7ed1\u5b9a\u7684\u4e0a\u4e0b\u6587\uff08context\uff09\u3002\u7136\u540e\uff0c\u4f7f\u7528 apply() \u65b9\u6cd5\u5c06 func \u51fd\u6570\u5e94\u7528\u5230 context \u5bf9\u8c61\uff0c\u4f20\u9012\u53c2\u6570 args\u3002<\/p>\n<p>\u8fd9\u662f\u4e3a\u4e86\u786e\u4fdd\u5728\u8c03\u7528 func \u51fd\u6570\u65f6\uff0cthis \u6307\u5411\u662f\u6b63\u786e\u7684\u5bf9\u8c61\uff0c\u65e0\u8bba\u9632\u6296\u51fd\u6570\u662f\u5728\u4ec0\u4e48\u4e0a\u4e0b\u6587\u4e2d\u8c03\u7528\u7684\u3002<\/p>\n<p><strong>\u603b\u7ed3<\/strong><\/p>\n<p>apply() \u548c call() \u65b9\u6cd5\u63d0\u4f9b\u4e86\u5728 JavaScript \u4e2d\u63a7\u5236\u51fd\u6570 this \u6307\u5411\u7684\u7075\u6d3b\u6027\u3002\u8fd9\u5728\u521b\u5efa\u52a8\u6001\u6216\u53ef\u91cd\u7528\u51fd\u6570\u65f6\u975e\u5e38\u6709\u7528\uff0c\u7279\u522b\u662f\u5f53\u9700\u8981\u4fee\u6539 this \u6307\u5411\u4ee5\u8bbf\u95ee\u4e0d\u540c\u5bf9\u8c61\u65f6\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662f\u5982\u4f55\u5728 JavaScript \u4e2d\u4f7f\u7528 apply() \u548c call() \u65b9\u6cd5\u66f4\u6539 this \u6307\u5411\uff1f\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>JavaScript \u4e2d\u66f4\u6539 this \u6307\u5411\u7684\u95ee\u9898 \u5728 JavaScript \u4e2d\uff0c\u51fd\u6570\u4e2d\u7684 this \u5173\u952e\u5b57\u901a\u5e38\u6307\u5411\u51fd\u6570\u88ab\u8c03\u7528\u7684\u5bf9\u8c61\u3002\u4f46\u662f\uff0c\u5728\u67d0\u4e9b\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u5e0c\u671b\u5c06 this \u6307\u5411\u4fee\u6539\u6210\u53e6\u4e00\u4e2a\u5bf9\u8c61\u3002 apply \u548c call apply() \u548c call() \u65b9\u6cd5\u53ef\u4ee5\u7528\u4e8e\u66f4\u6539\u51fd\u6570\u7684 this \u6307\u5411\u3002\u8fd9\u4e24\u4e2a\u65b9\u6cd5\u90fd\u63a5\u6536\u4e24\u4e2a\u53c2\u6570\uff1a \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u7b2c\u4e00\u4e2a\u53c2\u6570\u662f\u5e0c\u671b\u4fee\u6539\u6210\u51fd\u6570 this \u6307\u5411\u7684\u5bf9\u8c61\u3002 \u7b2c\u4e8c\u4e2a\u53c2\u6570\u662f\u4e00\u4e2a\u53c2\u6570\u6570\u7ec4\uff0c\u5c06\u4f20\u9012\u7ed9\u8be5\u51fd\u6570\u3002 \u9632\u6296\u51fd\u6570\u4e2d\u7684 apply \u7ed9\u5b9a\u7684\u9632\u6296\u51fd\u6570\u4f7f\u7528 apply() \u65b9\u6cd5\u6765\u4fee\u6539 this \u6307\u5411\u3002 \u5728\u5185\u90e8\u51fd\u6570\u4e2d\uff0cthis \u6307\u5411\u88ab\u8bbe\u7f6e\u4e3a\u51fd\u6570\u88ab\u7ed1\u5b9a\u7684\u4e0a\u4e0b\u6587\uff08context\uff09\u3002\u7136\u540e\uff0c\u4f7f\u7528 apply() \u65b9\u6cd5\u5c06 func \u51fd\u6570\u5e94\u7528\u5230 context \u5bf9\u8c61\uff0c\u4f20\u9012\u53c2\u6570 args\u3002 \u8fd9\u662f\u4e3a\u4e86\u786e\u4fdd\u5728\u8c03\u7528 func \u51fd\u6570\u65f6\uff0cthis \u6307\u5411\u662f\u6b63\u786e\u7684\u5bf9\u8c61\uff0c\u65e0\u8bba\u9632\u6296\u51fd\u6570\u662f\u5728\u4ec0\u4e48\u4e0a\u4e0b\u6587\u4e2d\u8c03\u7528\u7684\u3002 \u603b\u7ed3 apply() \u548c call() \u65b9\u6cd5\u63d0\u4f9b\u4e86\u5728 JavaScript \u4e2d\u63a7\u5236\u51fd\u6570 this \u6307\u5411\u7684\u7075\u6d3b\u6027\u3002\u8fd9\u5728\u521b\u5efa\u52a8\u6001\u6216\u53ef\u91cd\u7528\u51fd\u6570\u65f6\u975e\u5e38\u6709\u7528\uff0c\u7279\u522b\u662f\u5f53\u9700\u8981\u4fee\u6539 this [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-3819","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/3819","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=3819"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/3819\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=3819"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=3819"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=3819"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}