{"id":3710,"date":"2024-11-10T14:59:55","date_gmt":"2024-11-10T06:59:55","guid":{"rendered":"https:\/\/fwq.ai\/blog\/3710\/"},"modified":"2024-11-10T14:59:55","modified_gmt":"2024-11-10T06:59:55","slug":"%e4%b8%ba%e4%bb%80%e4%b9%88%e4%bd%bf%e7%94%a8-a-callb-%e8%b0%83%e7%94%a8-this-say-%e6%97%b6%e6%b2%a1%e6%9c%89%e8%be%93%e5%87%ba%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/3710\/","title":{"rendered":"\u4e3a\u4ec0\u4e48\u4f7f\u7528 `a.call(b)` \u8c03\u7528 `this.say` \u65f6\u6ca1\u6709\u8f93\u51fa\uff1f"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/001\/246\/273\/173112354445157.jpg\" class=\"aligncenter\" title=\"\u4e3a\u4ec0\u4e48\u4f7f\u7528 `a.call(b)` \u8c03\u7528 `this.say` \u65f6\u6ca1\u6709\u8f93\u51fa\uff1f\u63d2\u56fe\" alt=\"\u4e3a\u4ec0\u4e48\u4f7f\u7528 `a.call(b)` \u8c03\u7528 `this.say` \u65f6\u6ca1\u6709\u8f93\u51fa\uff1f\u63d2\u56fe\" \/><\/p>\n<p><strong>\u4e0d\u8f93\u51fa\uff1f<\/strong><\/p>\n<p>\u7ed9\u5b9a\u4ee3\u7801\u4e2d\uff0c\u5b9a\u4e49\u4e86\u4e24\u4e2a\u51fd\u6570 a \u548c b\uff1a<\/p>\n<pre>function a(name, age) {\n  this.name = name;\n  this.age = age;\n  this.say = function() {\n    console.log(age);\n  };\n}\n\nfunction b() {\n  this.eat = function() {\n    a.call(b);\n  };\n}<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u7136\u540e\u521b\u5efa\u4e86 b \u51fd\u6570\u7684\u4e00\u4e2a\u5b9e\u4f8b bb\uff0c\u5e76\u8c03\u7528\u5176 eat \u65b9\u6cd5\uff1a<\/p>\n<pre>var bb = new b();\nbb.eat();<\/pre>\n<p> \u767b\u5f55\u540e\u590d\u5236 <\/p>\n<p>\u4f46\u4ee3\u7801\u4e2d\u5b58\u5728\u4e00\u4e2a\u95ee\u9898\uff0c\u5bfc\u81f4\u4e0d\u4f1a\u6253\u5370\u4efb\u4f55\u8f93\u51fa\u3002\u95ee\u9898\u5728\u4e8e\uff0c\u4f60\u8bd5\u56fe\u5728 a.call(b) \u4e2d\u8c03\u7528 this.say\uff0c\u4f46 this \u4e0d\u662f\u6307\u5411 a \u51fd\u6570\u7684\u5b9e\u4f8b\uff0c\u800c\u662f\u6307\u5411 b \u51fd\u6570\u7684\u5b9e\u4f8b\u3002\u8fd9\u610f\u5473\u7740\uff0cthis.say \u5f15\u7528\u7684\u662f b \u51fd\u6570\u7684\u5b9e\u4f8b\u4e2d\u7684\u65b9\u6cd5\uff0c\u800c\u4e0d\u662f a \u51fd\u6570\u7684\u5b9e\u4f8b\u4e2d\u7684\u65b9\u6cd5\u3002<\/p>\n<p>\u56e0\u6b64\uff0c\u4ee3\u7801\u5b9e\u9645\u4e0a\u662f\u5728\u8c03\u7528 b \u51fd\u6570\u7684 say \u65b9\u6cd5\uff0c\u800c b \u51fd\u6570\u6ca1\u6709\u8fd9\u6837\u7684\u65b9\u6cd5\u3002\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48\u4ee3\u7801\u4e0d\u4f1a\u6253\u5370\u4efb\u4f55\u8f93\u51fa\u7684\u539f\u56e0\u3002<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662f\u4f7f\u7528 `a.call(b)` \u8c03\u7528 `this.say` \u65f6\u6ca1\u6709\u8f93\u51fa\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>\u4e0d\u8f93\u51fa\uff1f \u7ed9\u5b9a\u4ee3\u7801\u4e2d\uff0c\u5b9a\u4e49\u4e86\u4e24\u4e2a\u51fd\u6570 a \u548c b\uff1a function a(name, age) { this.name = name; this.age = age; this.say = function() { console.log(age); }; } function b() { this.eat = function() { a.call(b); }; } \u767b\u5f55\u540e\u590d\u5236 \u7136\u540e\u521b\u5efa\u4e86 b \u51fd\u6570\u7684\u4e00\u4e2a\u5b9e\u4f8b bb\uff0c\u5e76\u8c03\u7528\u5176 eat \u65b9\u6cd5\uff1a var bb = new b(); bb.eat(); \u767b\u5f55\u540e\u590d\u5236 \u4f46\u4ee3\u7801\u4e2d\u5b58\u5728\u4e00\u4e2a\u95ee\u9898\uff0c\u5bfc\u81f4\u4e0d\u4f1a\u6253\u5370\u4efb\u4f55\u8f93\u51fa\u3002\u95ee\u9898\u5728\u4e8e\uff0c\u4f60\u8bd5\u56fe\u5728 a.call(b) \u4e2d\u8c03\u7528 this.say\uff0c\u4f46 this \u4e0d\u662f\u6307\u5411 a \u51fd\u6570\u7684\u5b9e\u4f8b\uff0c\u800c\u662f\u6307\u5411 b [&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-3710","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/3710","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=3710"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/3710\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=3710"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=3710"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=3710"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}