{"id":17248,"date":"2025-05-09T10:37:52","date_gmt":"2025-05-09T02:37:52","guid":{"rendered":"https:\/\/92it.top\/?p=17248"},"modified":"2025-05-09T10:37:52","modified_gmt":"2025-05-09T02:37:52","slug":"javascript-%e5%8e%9f%e5%9e%8b","status":"publish","type":"post","link":"https:\/\/92it.top\/?p=17248","title":{"rendered":"JavaScript \u539f\u578b"},"content":{"rendered":"\n

JavaScript\u7684\u5bf9\u8c61\u6a21\u578b\u975e\u5e38\u5f3a\u5927\uff0c\u4f46\u5b83\u4e0e\u6807\u51c6\u9762\u5411\u5bf9\u8c61\u8bed\u8a00\u7684\u5bf9\u8c61\u6a21\u578b\u7a0d\u6709\u4e0d\u540c\u3002JavaScript\u91c7\u7528\u7684\u4e0d\u662f\u57fa\u4e8e\u7c7b\u7684\u9762\u5411\u5bf9\u8c61\u7cfb\u7edf\uff0c\u800c\u662f\u66f4\u5f3a\u5927\u7684\u539f\u578b\u6a21\u578b\uff0c\u5176\u4e2d\u7684\u5bf9\u8c61\u53ef\u7ee7\u627f\u548c\u6269\u5c55\u5176\u4ed6\u5bf9\u8c61\u7684\u884c\u4e3a\u3002<\/p>\n\n\n\n

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\n
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\n
\"\"<\/figure><\/div>\n\n\n

\u4e0b\u9762\u6765\u5c1d\u8bd5\u5bf9\u5c5e\u6027sitting\u8fdb\u884c\u8fd9\u79cd\u5224\u65ad\u3002\u6211\u4eec\u77e5\u9053\uff0c\u5728\u539f\u578b\u4e2d\u5b9a\u4e49\u4e86\u5c5e\u6027sitting\uff0c\u5e76\u5c06\u5176\u521d\u59cb\u5316\u4e3afalse\uff0c\u56e0\u6b64\u5c06spot.sitting\u8bbe\u7f6e\u4e3atrue\u65f6\uff0c\u5c06\u91cd\u5199\u539f\u578b\u4e2d\u7684\u5c5e\u6027sitting\uff0c\u5e76\u5728\u5b9e\u4f8bspot\u4e2d\u5b9a\u4e49\u5c5e\u6027sitting\u3002\u4e0b\u9762\u6765\u8be2\u95eespot\u548cfido\u81ea\u5df1\u662f\u5426\u5b9a\u4e49\u4e86\u5c5e\u6027sitting\uff1a<\/p>\n\n\n

\n
\"\"<\/figure><\/div>\n\n\n

\u5efa\u7acb\u539f\u578b\u94fe<\/strong><\/p>\n\n\n\n

\n\n\n\n

\u54b1\u4eec\u6765\u8003\u8651\u5982\u4f55\u5efa\u7acb\u539f\u578b\u94fe\u3002\u5bf9\u8c61\u4e0d\u4ec5\u53ef\u4ee5\u7ee7\u627f\u4e00\u4e2a\u539f\u578b\u7684\u5c5e\u6027\uff0c\u8fd8\u53ef\u7ee7\u627f\u4e00\u4e2a\u539f\u578b\u94fe\u3002\u57fa\u4e8e\u524d\u9762\u8003\u8651\u95ee\u9898\u7684\u65b9\u5f0f\uff0c\u8fd9\u5e76\u4e0d\u96be\u7406\u89e3\u3002\u5047\u8bbe\u6211\u4eec\u9700\u8981\u4e00\u4e2a\u7528\u4e8e\u521b\u5efa\u8868\u6f14\u72ac\u7684\u8868\u6f14\u72ac\u539f\u578b\uff0c\u5e76\u5e0c\u671b\u8fd9\u4e2a\u539f\u578b\u4f9d\u8d56\u4e8e\u5c0f\u72d7\u539f\u578b\u63d0\u4f9b\u7684\u65b9\u6cd5bark\u3001 run\u548cwag\u3002\u4e0b\u9762\u5c31\u6765\u5efa\u7acb\u8fd9\u6837\u7684\u539f\u578b\u94fe\uff0c\u4f53\u4f1a\u4e00\u4e0b\u5176\u4e2d\u7684\u5404\u4e2a\u90e8\u5206\u662f\u5982\u4f55\u534f\u540c\u5de5\u4f5c\u7684\u3002<\/p>\n\n\n

\n
\"\"<\/figure><\/div>\n\n\n

\u539f\u578b\u94fe\u4e2d\u7684\u7ee7\u627f\u539f\u7406<\/strong><\/p>\n\n\n\n

\n\n\n\n

\u4e3a\u8868\u6f14\u72ac\u5efa\u7acb\u539f\u578b\u94fe\u540e\uff0c\u4e0b\u9762\u6765\u770b\u770b\u5176\u4e2d\u7684\u7ee7\u627f\u539f\u7406\u3002\u5bf9\u4e8e\u672c\u9875\u4e0b\u65b9\u7684\u6bcf\u4e2a\u5c5e\u6027\u548c\u65b9\u6cd5\uff0c\u8bf7\u6cbf\u539f\u578b\u94fe\u5411\u4e0a\u627e\u51fa\u5b83\u4eec\u90fd\u662f\u5728\u54ea\u91cc\u5b9a\u4e49\u7684\u3002<\/p>\n\n\n

\n
\"\"<\/figure><\/div>\n\n\n

\u521b\u5efa\u8868\u6f14\u72ac\u539f\u578b<\/strong><\/p>\n\n\n\n

\n\n\n\n

\u521b\u5efa\u5c0f\u72d7\u539f\u578b\u65f6\uff0c\u53ea\u9700\u76f4\u63a5\u4f7f\u7528\u6784\u9020\u51fd\u6570Dog\u7684\u5c5e\u6027prototype\u63d0\u4f9b\u7684\u7a7a\u5bf9\u8c61\uff0c\u5728\u5176\u4e2d\u6dfb\u52a0\u8981\u8ba9\u6bcf\u4e2a\u5c0f\u72d7\u5b9e\u4f8b\u90fd\u7ee7\u627f\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u5373\u53ef\u3002\u4f46\u521b\u5efa\u8868\u6f14\u72ac\u539f\u578b\u65f6\uff0c\u6211\u4eec\u5fc5\u987b\u505a\u66f4\u591a\u7684\u5de5\u4f5c\uff0c\u56e0\u4e3a\u6211\u4eec\u9700\u8981\u7684\u662f\u4e00\u4e2a\u7ee7\u627f\u53e6\u4e00\u4e2a\u539f\u578b\uff08\u5c0f\u72d7\u539f\u578b\uff09\u7684\u539f\u578b\u5bf9\u8c61\u3002\u4e3a\u6b64\uff0c\u6211\u4eec\u5fc5\u987b\u521b\u5efa\u4e00\u4e2a\u7ee7\u627f\u5c0f\u72d7\u539f\u578b\u7684\u5bf9\u8c61\uff0c\u518d\u4eb2\u81ea\u52a8\u624b\u5efa\u7acb\u5173\u8054\u3002\u5f53\u524d\uff0c\u6211\u4eec\u6709\u4e00\u4e2a\u5c0f\u72d7\u539f\u578b\uff0c\u8fd8\u6709\u4e00\u7cfb\u5217\u7ee7\u627f\u8fd9\u4e2a\u539f\u578b\u7684\u5c0f\u72d7\u5b9e\u4f8b\uff0c\u800c\u76ee\u6807\u662f\u521b\u5efa\u4e00\u4e2a\u7ee7\u627f\u5c0f\u72d7\u539f\u578b\u7684\u8868\u6f14\u72ac\u539f\u578b\u4ee5\u53ca\u4e00\u7cfb\u5217\u7ee7\u627f\u8868\u6f14\u72ac\u539f\u578b\u7684\u8868\u6f14\u72ac\u5b9e\u4f8b\u3002<\/p>\n\n\n\n

\u4e3a\u6b64\uff0c\u9700\u8981\u4e00\u6b65\u4e00\u6b65\u6765\u5b8c\u6210\u3002<\/p>\n\n\n

\n
\"\"<\/figure><\/div>\n\n\n

\u9996\u5148\uff0c\u9700\u8981\u4e00\u4e2a\u7ee7\u627f\u5c0f\u72d7\u539f\u578b\u7684\u5bf9\u8c61<\/strong><\/p>\n\n\n\n

\u524d\u9762\u8bf4\u8fc7\uff0c\u8868\u6f14\u72ac\u539f\u578b\u662f\u4e00\u4e2a\u7ee7\u627f\u5c0f\u72d7\u539f\u578b\u7684\u5bf9\u8c61\u3002\u8981\u521b\u5efa\u7ee7\u627f\u5c0f\u72d7\u539f\u578b\u7684\u5bf9\u8c61\uff0c\u6700\u4f73\u65b9\u5f0f\u662f\u4ec0\u4e48\u5462\uff1f\u5176\u5b9e\u5c31\u662f\u524d\u9762\u521b\u5efa\u5c0f\u72d7\u5b9e\u4f8b\u65f6\u4e00\u76f4\u91c7\u7528\u7684\u65b9\u5f0f\u3002\u4f60\u53ef\u80fd\u8fd8\u8bb0\u5f97\uff0c\u8fd9\u79cd\u65b9\u5f0f\u7c7b\u4f3c\u4e8e\u4e0b\u9762\u8fd9\u6837\uff1a<\/p>\n\n\n

\n
\"\"<\/figure><\/div>\n\n\n

\u4e0a\u8ff0\u4ee3\u7801\u521b\u5efa\u4e00\u4e2a\u7ee7\u627f\u5c0f\u72d7\u539f\u578b\u7684\u5bf9\u8c61\uff0c\u56e0\u4e3a\u5b83\u4e0e\u4ee5\u524d\u521b\u5efa\u5c0f\u72d7\u5b9e\u4f8b\u65f6\u4f7f\u7528\u7684\u4ee3\u7801\u5b8c\u5168\u76f8\u540c\uff0c\u53ea\u662f\u6ca1\u6709\u5411\u6784\u9020\u51fd\u6570\u63d0\u4f9b\u4efb\u4f55\u5b9e\u53c2\u3002\u4e3a\u4ec0\u4e48\u8fd9\u6837\u505a\u5462\uff1f\u56e0\u4e3a\u5728\u8fd9\u91cc\uff0c\u6211\u4eec\u53ea\u9700\u8981\u4e00\u4e2a\u7ee7\u627f\u5c0f\u72d7\u539f\u578b\u7684\u5c0f\u72d7\u5bf9\u8c61\uff0c\u800c\u4e0d\u5173\u5fc3\u5176\u7ec6\u8282\u3002<\/p>\n\n\n

\n
\"\"<\/figure><\/div>\n\n\n

\u5f53\u524d\uff0c\u6211\u4eec\u9700\u8981\u7684\u662f\u4e00\u4e2a\u8868\u6f14\u72ac\u539f\u578b\u3002\u4e0e\u5176\u4ed6\u5c0f\u72d7\u5b9e\u4f8b\u4e00\u6837\uff0c\u5b83\u4e5f\u662f\u4e00\u4e2a\u7ee7\u627f\u5c0f\u72d7\u539f\u578b\u7684\u5bf9\u8c61\u3002\u4e0b\u9762\u6765\u770b\u770b\u5982\u4f55\u5c06\u8fd9\u4e2a\u7a7a\u7684\u5c0f\u72d7\u5b9e\u4f8b\u53d8\u6210\u6240\u9700\u7684\u8868\u6f14\u72ac\u539f\u578b\u3002<\/p>\n\n\n\n

\u63a5\u4e0b\u6765\uff0c\u5c06\u65b0\u5efa\u7684\u5c0f\u72d7\u5b9e\u4f8b\u53d8\u6210\u8868\u6f14\u72ac\u539f\u578b<\/strong><\/p>\n\n\n\n

\u81f3\u6b64\uff0c\u6211\u4eec\u6709\u4e86\u4e00\u4e2a\u5c0f\u72d7\u5b9e\u4f8b\uff0c\u4f46\u5982\u4f55\u4f7f\u5176\u6210\u4e3a\u8868\u6f14\u72ac\u539f\u578b\u5462\uff1f\u4e3a\u6b64\uff0c\u53ea\u9700\u5c06\u5b83\u8d4b\u7ed9\u6784\u9020\u51fd\u6570ShowDog\u7684\u5c5e\u6027prototype\u3002\u7b49\u7b49\uff0c\u6211\u4eec\u8fd8\u6ca1\u6709\u6784\u9020\u51fd\u6570ShowDog\u5462\uff0c\u4e0b\u9762\u5c31\u6765\u521b\u5efa\u5b83\uff1a<\/p>\n\n\n

\n
\"\"<\/figure><\/div>\n\n\n

\u6709\u4e86\u8fd9\u6837\u7684\u6784\u9020\u51fd\u6570\u540e\uff0c\u4fbf\u53ef\u5c06\u5176\u5c5e\u6027prototype\u8bbe\u7f6e\u4e3a\u4e00\u4e2a\u65b0\u7684\u5c0f\u72d7\u5b9e\u4f8b\u4e86\uff1a<\/p>\n\n\n

\n
\"\"<\/figure><\/div>\n\n\n

\u6765\u770b\u770b\u6211\u4eec\u5230\u4e86\u54ea\u4e00\u6b65\uff1a\u6211\u4eec\u6709\u6784\u9020\u51fd\u6570ShowDog\uff0c\u53ef\u7528\u6765\u521b\u5efa\u8868\u6f14\u72ac\u5b9e\u4f8b\u3002\u6211\u4eec\u8fd8<\/p>\n\n\n\n

\u6709\u4e00\u4e2a\u8868\u6f14\u72ac\u539f\u578b\uff0c\u5b83\u662f\u4e00\u4e2a\u5c0f\u72d7\u5b9e\u4f8b\u3002\u4e0b\u9762\u6765\u5c06\u5bf9\u8c61\u56fe\u4e2d\u7684\u6807\u7b7e\u201cDog\u201d\u6539\u4e3a\u201c\u8868\u6f14\u72ac\u539f\u578b\u201d\uff0c\u786e\u4fdd\u5b83\u51c6\u786e\u5730\u53cd\u6620\u4e86\u8fd9\u4e9b\u5bf9\u8c61\u626e\u6f14\u7684\u89d2\u8272\u3002\u4f46\u522b\u5fd8\u4e86\uff0c\u8868\u6f14\u72ac\u539f\u578b\u4f9d\u7136\u662f\u4e00\u4e2a\u5c0f\u72d7\u5b9e\u4f8b\u3002<\/p>\n\n\n

\n
\"\"<\/figure><\/div>\n\n\n

\u6709\u4e86\u6784\u9020\u51fd\u6570ShowDog\u548c\u8868\u6f14\u72ac\u539f\u578b\u540e\uff0c\u6211\u4eec\u9700\u8981\u56de\u8fc7\u5934\u53bb\u8865\u5145\u4e00\u4e9b\u7ec6\u8282\u3002\u6211\u4eec\u5c06\u6df1\u5165\u7814\u7a76\u8fd9\u4e2a\u6784\u9020\u51fd\u6570\uff0c\u5e76\u7ed9\u8868\u6f14\u72ac\u539f\u578b\u6dfb\u52a0\u4e00\u4e9b\u5c5e\u6027\u548c\u65b9\u6cd5\uff0c\u8ba9\u8868\u6f14\u72ac\u5177\u5907\u6240\u9700\u7684\u989d\u5916\u884c\u4e3a\u3002<\/p>\n\n\n\n

\u8be5\u8865\u5168\u539f\u578b\u4e86<\/strong><\/p>\n\n\n\n

\u6211\u4eec\u8bbe\u7f6e\u4e86\u8868\u6f14\u72ac\u539f\u578b\uff0c\u4f46\u5f53\u524d\u5b83\u53ea\u662f\u4e00\u4e2a\u7a7a\u7684\u5c0f\u72d7\u5b9e\u4f8b\u3002\u73b0\u5728\u8be5\u7ed9\u5b83\u6dfb\u52a0\u5c5e\u6027\u548c\u884c\u4e3a\uff0c\u8ba9\u5b83\u66f4\u50cf\u8868\u6f14\u72ac\u539f\u578b\u4e86\u3002<\/p>\n\n\n\n

\u8981\u7ed9\u8868\u6f14\u72ac\u6dfb\u52a0\u7684\u5c5e\u6027\u548c\u65b9\u6cd5\u5982\u4e0b\uff1a<\/p>\n\n\n

\n
\"\"<\/figure><\/div>\n\n\n

\u521b\u5efa\u8868\u6f14\u72ac\u5b9e\u4f8b<\/strong><\/p>\n\n\n

\n
\"\"<\/figure><\/div>\n\n\n

\u6d4b\u8bd5\u8868\u6f14\u72ac<\/strong><\/p>\n\n\n\n

\u8bf7\u5c06\u524d\u4e00\u9875\u7684\u6240\u6709\u4ee3\u7801\u4ee5\u53ca\u4e0b\u9762\u7684\u6d4b\u8bd5\u4ee3\u7801\u6dfb\u52a0\u5230\u4e00\u4e2a\u7f51\u9875\u4e2d\uff0c\u5bf9scotty\u8fdb\u884c\u8be6\u5c3d\u7684\u6d4b\u8bd5\u3002\u53e6\u5916\uff0c\u987a\u4fbf\u521b\u5efa\u51e0\u4e2a\u8868\u6f14\u72ac\u5b9e\u4f8b\uff0c\u5e76\u5bf9\u4ed6\u4eec\u8fdb\u884c\u6d4b\u8bd5\u3002<\/p>\n\n\n\n

scotty.stack();\nscotty.bark();\nconsole.log(scotty.league);\nconsole.log(scotty.species);<\/pre>\n\n\n
\n
\"\"<\/figure><\/div>\n\n\n
\u95ee: <\/strong>\u524d\u9762\u8c03\u7528\u6784\u9020\u51fd\u6570Dog<\/strong>\u6765\u521b\u5efa\u7528\u4f5c\u8868\u6f14\u72ac\u539f\u578b\u7684\u5c0f\u72d7\u5b9e\u4f8b\u65f6\uff0c\u6ca1\u6709\u6307\u5b9a\u4efb\u4f55\u5b9e\u53c2\u3002\u8fd9\u662f\u4e3a\u4ec0\u4e48\uff1f<\/p>\n\n\n\n
\u7b54:\u00a0<\/strong>\u56e0\u4e3a\u5bf9\u4e8e\u8fd9\u4e2a\u5c0f\u72d7\u5b9e\u4f8b\uff0c\u6211\u4eec\u552f\u4e00\u7684\u8981\u6c42\u662f\u5b83\u7ee7\u627f\u4e86\u5c0f\u72d7\u539f\u578b\u3002\u8fd9\u4e2a\u5c0f\u72d7\u5b9e\u4f8b\u4e0d\u50cfFido\u548cFluffy\u90a3\u6837\u662f<\/p>\n\n\n\n
\u5177\u4f53\u7684\u5c0f\u72d7\uff0c\u800c\u53ea\u662f\u4e00\u4e2a\u7ee7\u627f\u5c0f\u72d7\u539f\u578b\u7684\u901a\u7528\u5c0f\u72d7\u5b9e\u4f8b\u3002\u53e6\u5916\uff0c\u6240\u6709\u7ee7\u627f\u8868\u6f14\u72ac\u539f\u578b\u7684\u5c0f\u72d7\u90fd\u5b9a\u4e49\u4e86\u81ea\u5df1\u7684\u5c5e\u6027name\u3001breed\u548cweight\u3002\u56e0\u6b64\u5373\u4fbf\u7528\u4f5c\u8868\u6f14\u72ac\u539f\u578b\u7684\u5c0f\u72d7\u5b9e\u4f8b\u7ed9\u8fd9\u4e9b\u5c5e\u6027\u8bbe\u7f6e\u4e86\u503c\uff0c\u6211\u4eec\u4e5f\u6839\u672c\u770b\u4e0d\u5230\u8fd9\u4e9b\u503c\uff0c\u56e0\u4e3a\u8868\u6f14\u72ac\u5b9e\u4f8b\u603b\u662f\u91cd\u5199\u8fd9\u4e9b\u5c5e\u6027\u3002<\/p>\n\n\n\n
\u95ee:\u00a0<\/strong>\u90a3\u4e48\uff0c\u5728\u7528\u4f5c\u8868\u6f14\u72ac\u539f\u578b\u7684\u5c0f\u72d7\u5b9e\u4f8b\u4e2d\uff0c\u8fd9\u4e9b\u5c5e\u6027\u662f\u600e\u4e48\u6837\u7684\u5462\uff1f<\/p>\n\n\n\n
\u7b54: <\/strong>\u6839\u672c\u6ca1\u6709\u7ed9\u5b83\u4eec\u8d4b\u503c\uff0c\u56e0\u6b64\u5b83\u4eec\u90fd\u662f\u672a\u5b9a\u4e49\u7684\u3002<\/p>\n\n\n\n
\u95ee: <\/strong>\u5982\u679c\u6ca1\u6709\u5c06ShowDog<\/strong>\u7684\u5c5e\u6027prototype<\/strong>\u8bbe\u7f6e\u4e3a\u4e00\u4e2a\u5c0f\u72d7\u5b9e\u4f8b\uff0c\u7ed3\u679c\u5c06\u5982\u4f55\uff1f<\/p>\n\n\n\n
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\"\"<\/figure><\/div>\n\n
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\"\"<\/figure><\/div>\n\n
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\"\"<\/figure><\/div>\n\n\n
function meditate() {\nconsole.log(\"Everything is an object...\");\n}\nalert(meditate instanceof Object);<\/pre>\n\n\n\n
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