{"id":2512,"date":"2024-11-10T13:57:32","date_gmt":"2024-11-10T05:57:32","guid":{"rendered":"https:\/\/fwq.ai\/blog\/2512\/"},"modified":"2024-11-10T13:57:32","modified_gmt":"2024-11-10T05:57:32","slug":"javascript-%e4%b8%ad%e7%9a%84-this-%e5%88%b0%e5%ba%95%e6%8c%87%e5%90%91%e8%b0%81%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/2512\/","title":{"rendered":"JavaScript \u4e2d\u7684 this \u5230\u5e95\u6307\u5411\u8c01\uff1f"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/img.php.cn\/upload\/article\/001\/246\/273\/173078101430009.jpg\" class=\"aligncenter\" title=\"JavaScript \u4e2d\u7684 this \u5230\u5e95\u6307\u5411\u8c01\uff1f\u63d2\u56fe\" alt=\"JavaScript \u4e2d\u7684 this \u5230\u5e95\u6307\u5411\u8c01\uff1f\u63d2\u56fe\" \/><\/p>\n<p><strong>JavaScript \u4e2d this \u7684\u52a8\u6001\u7279\u6027<\/strong><\/p>\n<p>\u5728 JavaScript \u4e2d\uff0cthis \u5173\u952e\u5b57\u7684\u503c\u53d6\u51b3\u4e8e\u8c03\u7528\u51fd\u6570\u7684\u65b9\u5f0f\u3002\u901a\u5e38\uff0cthis \u6307\u5411\u8c03\u7528\u8be5\u51fd\u6570\u7684\u5bf9\u8c61\u3002\u7136\u800c\uff0c\u6839\u636e\u51fd\u6570\u88ab\u8c03\u7528\u65f6\u7684\u4e0a\u4e0b\u6587\uff0cthis \u7684\u503c\u53ef\u80fd\u4f1a\u53d1\u751f\u53d8\u5316\u3002<\/p>\n<p>\u4f8b\u5982\uff0c\u5f53\u4e00\u4e2a\u65b9\u6cd5\u4f5c\u4e3a\u67d0\u4e2a\u5bf9\u8c61\u7684\u65b9\u6cd5\u88ab\u8c03\u7528\u65f6\uff0cthis \u6307\u5411\u8be5\u5bf9\u8c61\u3002\u4f46\u5f53\u4f5c\u4e3a\u72ec\u7acb\u51fd\u6570\u8c03\u7528\u65f6\uff0cthis \u7684\u503c\u53d6\u51b3\u4e8e\u8c03\u7528\u51fd\u6570\u7684\u4e0a\u4e0b\u6587\u3002\u56e0\u6b64\uff0c\u7406\u89e3\u8c03\u7528\u51fd\u6570\u7684\u4e0a\u4e0b\u6587\u5bf9\u4e8e\u786e\u5b9a this \u7684\u503c\u81f3\u5173\u91cd\u8981\u3002<\/p>\n<p>\u5c3d\u7ba1 this \u7684\u503c\u53d6\u51b3\u4e8e\u4e0a\u4e0b\u6587\uff0c\u4f46\u6709\u4e00\u4e2a\u4e0d\u53d8\u7684\u539f\u5219\uff1athis \u59cb\u7ec8\u6307\u5411\u8c03\u7528\u51fd\u6570\u7684\u5bf9\u8c61\u3002\u56e0\u6b64\uff0c\u5728\u7406\u89e3\u4ee3\u7801\u65f6\uff0c\u786e\u5b9a\u8c01\u8c03\u7528\u4e86\u51fd\u6570\u5bf9\u4e8e\u7406\u89e3 this \u7684\u503c\u81f3\u5173\u91cd\u8981\u3002<\/p>\n<p><span>\u7acb\u5373\u5b66\u4e60<\/span>\u201c\u201d\uff1b<\/p>\n<p>\u4ee5\u4e0a\u5c31\u662fJavaScript \u4e2d\u7684 this \u5230\u5e95\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":"<p>JavaScript \u4e2d this \u7684\u52a8\u6001\u7279\u6027 \u5728 JavaScript \u4e2d\uff0cthis \u5173\u952e\u5b57\u7684\u503c\u53d6\u51b3\u4e8e\u8c03\u7528\u51fd\u6570\u7684\u65b9\u5f0f\u3002\u901a\u5e38\uff0cthis \u6307\u5411\u8c03\u7528\u8be5\u51fd\u6570\u7684\u5bf9\u8c61\u3002\u7136\u800c\uff0c\u6839\u636e\u51fd\u6570\u88ab\u8c03\u7528\u65f6\u7684\u4e0a\u4e0b\u6587\uff0cthis \u7684\u503c\u53ef\u80fd\u4f1a\u53d1\u751f\u53d8\u5316\u3002 \u4f8b\u5982\uff0c\u5f53\u4e00\u4e2a\u65b9\u6cd5\u4f5c\u4e3a\u67d0\u4e2a\u5bf9\u8c61\u7684\u65b9\u6cd5\u88ab\u8c03\u7528\u65f6\uff0cthis \u6307\u5411\u8be5\u5bf9\u8c61\u3002\u4f46\u5f53\u4f5c\u4e3a\u72ec\u7acb\u51fd\u6570\u8c03\u7528\u65f6\uff0cthis \u7684\u503c\u53d6\u51b3\u4e8e\u8c03\u7528\u51fd\u6570\u7684\u4e0a\u4e0b\u6587\u3002\u56e0\u6b64\uff0c\u7406\u89e3\u8c03\u7528\u51fd\u6570\u7684\u4e0a\u4e0b\u6587\u5bf9\u4e8e\u786e\u5b9a this \u7684\u503c\u81f3\u5173\u91cd\u8981\u3002 \u5c3d\u7ba1 this \u7684\u503c\u53d6\u51b3\u4e8e\u4e0a\u4e0b\u6587\uff0c\u4f46\u6709\u4e00\u4e2a\u4e0d\u53d8\u7684\u539f\u5219\uff1athis \u59cb\u7ec8\u6307\u5411\u8c03\u7528\u51fd\u6570\u7684\u5bf9\u8c61\u3002\u56e0\u6b64\uff0c\u5728\u7406\u89e3\u4ee3\u7801\u65f6\uff0c\u786e\u5b9a\u8c01\u8c03\u7528\u4e86\u51fd\u6570\u5bf9\u4e8e\u7406\u89e3 this \u7684\u503c\u81f3\u5173\u91cd\u8981\u3002 \u7acb\u5373\u5b66\u4e60\u201c\u201d\uff1b \u4ee5\u4e0a\u5c31\u662fJavaScript \u4e2d\u7684 this 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