{"id":2515,"date":"2024-11-10T16:02:52","date_gmt":"2024-11-10T08:02:52","guid":{"rendered":"https:\/\/fwq.ai\/blog\/2515\/"},"modified":"2024-11-10T16:02:52","modified_gmt":"2024-11-10T08:02:52","slug":"javascript-%e4%b8%ad-this-%e7%9a%84%e7%94%a8%e6%b3%95%ef%bc%9a%e5%ae%83%e7%a9%b6%e7%ab%9f%e6%8c%87%e5%90%91%e8%b0%81%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/2515\/","title":{"rendered":"JavaScript \u4e2d this \u7684\u7528\u6cd5\uff1a\u5b83\u7a76\u7adf\u6307\u5411\u8c01\uff1f"},"content":{"rendered":"

\"JavaScript<\/p>\n

javascript \u4e2d this \u7684\u7528\u6cd5<\/strong><\/p>\n

\u5728 javascript \u4e2d\uff0cthis \u662f\u4e00\u4e2a\u7279\u6b8a\u5173\u952e\u5b57\uff0c\u5b83\u5f15\u7528\u51fd\u6570\u7684\u8c03\u7528\u8005\uff0c\u4e5f\u5c31\u662f\u8c03\u7528\u51fd\u6570\u7684\u5bf9\u8c61\u3002<\/p>\n

\u4e0a\u4e0b\u6587\u65e0\u5173\u6027<\/strong><\/p>\n

this \u7684\u503c\u5e76\u4e0d\u662f\u5728\u51fd\u6570\u5b9a\u4e49\u65f6\u786e\u5b9a\u7684\uff0c\u800c\u662f\u5728\u51fd\u6570\u8c03\u7528\u65f6\u786e\u5b9a\u7684\u3002\u56e0\u6b64\uff0c\u4e00\u4e2a\u51fd\u6570\u53ef\u4ee5\u5728\u4e0d\u540c\u7684\u5bf9\u8c61\u4e0a\u4e0b\u6587\u4e2d\u88ab\u8c03\u7528\uff0cthis \u7684\u503c\u4e5f\u4f1a\u76f8\u5e94\u5730\u6539\u53d8\u3002<\/p>\n

\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n

\u57fa\u672c\u539f\u5219<\/strong><\/p>\n

\u65e0\u8bba\u51fd\u6570\u88ab\u5982\u4f55\u8c03\u7528\uff0cthis \u901a\u5e38\u6307\u5411\u8c03\u7528\u51fd\u6570\u7684\u90a3\u4e2a\u5bf9\u8c61\u3002\u4f8b\u5982\uff1a<\/p>\n

const obj = {\n  name: 'John',\n  sayHello: function() {\n    console.log(`Hello, my name is ${this.name}`);\n  }\n};\n\nobj.sayHello(); \/\/ \u8f93\u51fa: Hello, my name is John<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
\u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0cthis \u6307\u5411\u4e86 obj \u5bf9\u8c61\uff0c\u56e0\u4e3a sayhello \u51fd\u6570\u662f\u7531 obj \u5bf9\u8c61\u8c03\u7528\u7684\u3002<\/p>\n
\u4f8b\u5916\u60c5\u51b5<\/strong><\/p>\n
\u5bf9\u4e8e\u4e00\u4e9b\u7279\u6b8a\u60c5\u51b5\uff0cthis \u7684\u503c\u53ef\u80fd\u4f1a\u6709\u4f8b\u5916\u3002\u4f8b\u5982\uff1a<\/p>\n
    \n
  •  \u4f5c\u4e3a\u51fd\u6570<\/strong>\uff1a\u5f53\u4e00\u4e2a\u51fd\u6570\u4f5c\u4e3a\u53e6\u4e00\u4e2a\u51fd\u6570\u53c2\u6570\u88ab\u4f20\u53c2\u65f6\uff0cthis \u5c06\u6307\u5411\u8c03\u7528\u8be5\u51fd\u6570\u7684\u51fd\u6570\u6240\u6307\u5411\u7684\u5bf9\u8c61\u3002<\/li>\n
  •  \u7bad\u5934\u51fd\u6570<\/strong>\uff1a\u7bad\u5934\u51fd\u6570\u6ca1\u6709\u81ea\u5df1\u7684 this\uff0c\u5b83\u5c06\u7ee7\u627f\u5176\u5b9a\u4e49\u65f6\u7684\u4e0a\u4e0b\u6587\u3002\u8fd9\u610f\u5473\u7740\u7bad\u5934\u51fd\u6570\u5185\u7684 this \u5c06\u6307\u5411\u5b9a\u4e49\u7bad\u5934\u51fd\u6570\u65f6\u7684 this\u3002<\/li>\n<\/ul>\n
    \u4ee5\u4e0a\u5c31\u662fJavaScript \u4e2d this \u7684\u7528\u6cd5\uff1a\u5b83\u7a76\u7adf\u6307\u5411\u8c01\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":"
    javascript \u4e2d this \u7684\u7528\u6cd5 \u5728 javascript \u4e2d\uff0cthis \u662f\u4e00\u4e2a\u7279\u6b8a\u5173\u952e\u5b57\uff0c\u5b83\u5f15\u7528\u51fd\u6570\u7684\u8c03\u7528\u8005\uff0c\u4e5f\u5c31\u662f\u8c03\u7528\u51fd\u6570\u7684\u5bf9\u8c61\u3002 \u4e0a\u4e0b\u6587\u65e0\u5173\u6027 this \u7684\u503c\u5e76\u4e0d\u662f\u5728\u51fd\u6570\u5b9a\u4e49\u65f6\u786e\u5b9a\u7684\uff0c\u800c\u662f\u5728\u51fd\u6570\u8c03\u7528\u65f6\u786e\u5b9a\u7684\u3002\u56e0\u6b64\uff0c\u4e00\u4e2a\u51fd\u6570\u53ef\u4ee5\u5728\u4e0d\u540c\u7684\u5bf9\u8c61\u4e0a\u4e0b\u6587\u4e2d\u88ab\u8c03\u7528\uff0cthis \u7684\u503c\u4e5f\u4f1a\u76f8\u5e94\u5730\u6539\u53d8\u3002 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u57fa\u672c\u539f\u5219 \u65e0\u8bba\u51fd\u6570\u88ab\u5982\u4f55\u8c03\u7528\uff0cthis \u901a\u5e38\u6307\u5411\u8c03\u7528\u51fd\u6570\u7684\u90a3\u4e2a\u5bf9\u8c61\u3002\u4f8b\u5982\uff1a const obj = { name: ‘John’, sayHello: function() { console.log(`Hello, my name is ${this.name}`); } }; obj.sayHello(); \/\/ \u8f93\u51fa: Hello, my name is John \u767b\u5f55\u540e\u590d\u5236 \u5728\u4e0a\u9762\u7684\u4ee3\u7801\u4e2d\uff0cthis \u6307\u5411\u4e86 obj \u5bf9\u8c61\uff0c\u56e0\u4e3a sayhello \u51fd\u6570\u662f\u7531 obj \u5bf9\u8c61\u8c03\u7528\u7684\u3002 \u4f8b\u5916\u60c5\u51b5 \u5bf9\u4e8e\u4e00\u4e9b\u7279\u6b8a\u60c5\u51b5\uff0cthis \u7684\u503c\u53ef\u80fd\u4f1a\u6709\u4f8b\u5916\u3002\u4f8b\u5982\uff1a \u4f5c\u4e3a\u51fd\u6570\uff1a\u5f53\u4e00\u4e2a\u51fd\u6570\u4f5c\u4e3a\u53e6\u4e00\u4e2a\u51fd\u6570\u53c2\u6570\u88ab\u4f20\u53c2\u65f6\uff0cthis \u5c06\u6307\u5411\u8c03\u7528\u8be5\u51fd\u6570\u7684\u51fd\u6570\u6240\u6307\u5411\u7684\u5bf9\u8c61\u3002 \u7bad\u5934\u51fd\u6570\uff1a\u7bad\u5934\u51fd\u6570\u6ca1\u6709\u81ea\u5df1\u7684 […]<\/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-2515","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/2515","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=2515"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/2515\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=2515"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=2515"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=2515"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}