{"id":4339,"date":"2025-06-16T09:37:23","date_gmt":"2025-06-17T01:37:23","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=4339"},"modified":"2025-06-17T09:37:23","modified_gmt":"2025-06-17T01:37:23","slug":"%e5%ad%b8%e7%bf%92vue-js%e7%b5%84%e4%bb%b6%e6%9d%a1%e4%bb%b6%e6%b8%b2%e6%9f%93%ef%bc%9a%e8%ae%93%e4%bd%a0%e7%9a%84%e7%b6%b2%e9%a0%81%e6%9b%b4%e5%85%b7%e5%bd%88%e6%80%a7","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/vue-js\/%e5%ad%b8%e7%bf%92vue-js%e7%b5%84%e4%bb%b6%e6%9d%a1%e4%bb%b6%e6%b8%b2%e6%9f%93%ef%bc%9a%e8%ae%93%e4%bd%a0%e7%9a%84%e7%b6%b2%e9%a0%81%e6%9b%b4%e5%85%b7%e5%bd%88%e6%80%a7\/","title":{"rendered":"\u6df1\u5165\u5b78\u7fd2 Vue.js \u7684\u7d44\u4ef6\u689d\u4ef6\u6e32\u67d3 (v-if)\uff1a\u63d0\u5347\u7db2\u9801\u5f48\u6027\u8207\u6548\u80fd\u7684\u6700\u4f73\u5be6\u8e10"},"content":{"rendered":"<p><meta name=\"keywords\" content=\"Vue.js, \u7d44\u4ef6\u689d\u4ef6\u6e32\u67d3, v-if, Vue 2025, JavaScript 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\u53ef\u4ee5\u907f\u514d\u4e0d\u5fc5\u8981\u7684DOM\u64cd\u4f5c\uff0c\u53ea\u6709\u7576\u689d\u4ef6\u6210\u7acb\u6642\u624d\u6e32\u67d3\u76f8\u61c9\u7684\u7d44\u4ef6\u3002<br \/>\n- **\u7c21\u5316\u908f\u8f2f**\uff1a\u958b\u767c\u8005\u53ef\u4ee5\u6839\u64da\u61c9\u7528\u7684\u4e0d\u540c\u72c0\u6cc1\uff0c\u9748\u6d3b\u5730\u986f\u793a\u6216\u96b1\u85cf\u7d44\u4ef6\uff0c\u8b93\u7a0b\u5f0f\u78bc\u66f4\u5177\u53ef\u8b80\u6027\u3002<\/p>\n<h2>Vue.js \u7d44\u4ef6\u689d\u4ef6\u6e32\u67d3 (v-if) \u7684\u7f3a\u9ede<\/h2>\n<p>- **\u6027\u80fd\u8003\u91cf**\uff1a\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u983b\u7e41\u7684\u689d\u4ef6\u8b8a\u5316\u6703\u5c0e\u81f4\u7d44\u4ef6\u7684\u91cd\u65b0\u6e32\u67d3\uff0c\u9019\u53ef\u80fd\u5f71\u97ff\u6027\u80fd\u3002\u56e0\u6b64\uff0c\u5728\u9ad8\u983b\u64cd\u4f5c\u4e2d\u61c9\u8b39\u614e\u4f7f\u7528\u3002<br \/>\n- **\u72c0\u614b\u7ba1\u7406**\uff1a\u5982\u679c\u96b1\u85cf\u7684\u7d44\u4ef6\u6709\u5167\u90e8\u72c0\u614b\uff0c\u4f7f\u7528 `v-if` \u53ef\u80fd\u5c0e\u81f4\u9019\u4e9b\u72c0\u614b\u5728\u986f\u793a\u6642\u88ab\u91cd\u7f6e\u3002<\/p>\n<h2>\u7e3d\u7d50<\/h2>\n<p>Vue.js \u7684\u7d44\u4ef6\u689d\u4ef6\u6e32\u67d3 (v-if) \u662f\u4e00\u500b\u5f37\u5927\u7684\u529f\u80fd\uff0c\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u9748\u6d3b\u63a7\u5236\u7d44\u4ef6\u7684\u986f\u793a\u8207\u96b1\u85cf\u3002\u5118\u7ba1\u5b83\u6709\u4e00\u4e9b\u6027\u80fd\u4e0a\u7684\u8003\u91cf\uff0c\u4f46\u5728\u8a31\u591a\u5be6\u969b\u61c9\u7528\u4e2d\uff0c\u5408\u7406\u4f7f\u7528 `v-if` \u80fd\u5920\u986f\u8457\u63d0\u5347\u7db2\u9801\u7684\u6548\u80fd\u8207\u4f7f\u7528\u8005\u9ad4\u9a57\u3002<\/p>\n<h2>Q&A\uff08\u5e38\u898b\u554f\u984c\u89e3\u7b54\uff09<\/h2>\n<h3>1. \u4f7f\u7528 `v-if` \u548c `v-show` \u6709\u4ec0\u9ebc\u5340\u5225\uff1f<\/h3>\n<p>`v-if` \u662f\u5be6\u969b\u4e0a\u6dfb\u52a0\u6216\u79fb\u9664 DOM \u5143\u7d20\uff0c\u800c `v-show` \u50c5\u662f\u5207\u63db\u5143\u7d20\u7684\u986f\u793a\u8207\u96b1\u85cf\u3002\u5c0d\u65bc\u9700\u8981\u983b\u7e41\u986f\u793a\u6216\u96b1\u85cf\u7684\u5143\u7d20\uff0c`v-show` \u53ef\u80fd\u66f4\u5408\u9069\u3002<\/p>\n<h3>2. \u53ef\u4ee5\u5728\u540c\u4e00\u7d44\u4ef6\u4e2d\u4f7f\u7528\u591a\u500b `v-if` \u55ce\uff1f<\/h3>\n<p>\u53ef\u4ee5\uff0c\u5728\u540c\u4e00\u7d44\u4ef6\u4e2d\u4f7f\u7528\u591a\u500b `v-if` \u4f86\u63a7\u5236\u4e0d\u540c\u7684\u986f\u793a\u908f\u8f2f\uff0c\u4f46\u9700\u6ce8\u610f\u6027\u80fd\u5f71\u97ff\uff0c\u5c24\u5176\u662f\u5728\u5927\u578b\u61c9\u7528\u4e2d\u3002<\/p>\n<h3>3. \u5982\u4f55\u8655\u7406 `v-if` \u4e2d\u7684\u7d44\u4ef6\u72c0\u614b\uff1f<\/h3>\n<p>\u5c0d\u65bc\u4f7f\u7528 `v-if` \u7684\u7d44\u4ef6\uff0c\u5efa\u8b70\u5c07\u72c0\u614b\u63d0\u5347\u81f3\u7236\u7d44\u4ef6\uff0c\u4e26\u901a\u904e props 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