{"id":4405,"date":"2025-06-14T08:53:19","date_gmt":"2025-06-17T01:50:19","guid":{"rendered":"https:\/\/badgameshow.com\/steven\/?p=4405"},"modified":"2025-06-17T08:53:19","modified_gmt":"2025-06-17T01:50:19","slug":"%e5%ad%b8%e7%bf%92%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8vue-js%e7%b5%84%e4%bb%b6%e7%bb%91%e5%ae%9a%e7%89%b9%e6%ae%8a%e5%b1%9e%e6%80%a7v-bindkey","status":"publish","type":"post","link":"https:\/\/badgameshow.com\/steven\/vue-js\/%e5%ad%b8%e7%bf%92%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8vue-js%e7%b5%84%e4%bb%b6%e7%bb%91%e5%ae%9a%e7%89%b9%e6%ae%8a%e5%b1%9e%e6%80%a7v-bindkey\/","title":{"rendered":"\u6df1\u5165\u5b78\u7fd2 Vue.js \u7d44\u4ef6\u7684\u7279\u6b8a\u5c6c\u6027\u7d81\u5b9a(v-bind:key)\uff5c2025 \u6700\u65b0\u6559\u5b78"},"content":{"rendered":"

<\/p>\n

\u7c21\u4ecb<\/h2>\n

Vue.js \u662f\u4e00\u500b\u8f15\u91cf\u7d1a\u7684 JavaScript \u6846\u67b6\uff0c\u80fd\u5e6b\u52a9\u958b\u767c\u8005\u5feb\u901f\u69cb\u5efa\u9ad8\u54c1\u8cea\u7684 Web \u61c9\u7528\u7a0b\u5f0f\u3002Vue.js \u7684\u7d44\u4ef6\u7cfb\u7d71\u662f\u5176\u6838\u5fc3\u7279\u6027\u4e4b\u4e00\uff0c\u9019\u88e1\u7279\u5225\u4ecb\u7d39\u5982\u4f55\u4f7f\u7528\u7d44\u4ef6\u7d81\u5b9a\u7279\u6b8a\u5c6c\u6027\uff0c\u5c24\u5176\u662f v-bind:key\u3002\u9019\u500b\u529f\u80fd\u4e0d\u50c5\u80fd\u63d0\u5347\u61c9\u7528\u6027\u80fd\uff0c\u9084\u80fd\u589e\u52a0\u7d44\u4ef6\u7684\u9748\u6d3b\u6027\u3002<\/p>\n

\u4ec0\u9ebc\u662f v-bind:key\uff1f<\/h2>\n

v-bind:key \u662f Vue.js \u63d0\u4f9b\u7684\u4e00\u500b\u7279\u6b8a\u6307\u4ee4\uff0c\u7528\u65bc\u5728\u6e32\u67d3\u5217\u8868\u6642\u5e6b\u52a9 Vue \u8ddf\u8e2a\u6bcf\u500b\u7d44\u4ef6\u7684\u8eab\u4efd\u3002\u9019\u5c0d\u65bc\u63d0\u5347\u6027\u80fd\u548c\u6b63\u78ba\u66f4\u65b0 DOM \u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u7576 Vue \u6e32\u67d3\u4e00\u500b\u5217\u8868\u7684\u7d44\u4ef6\u6642\uff0c\u4f7f\u7528 key \u53ef\u4ee5\u8b93\u5b83\u66f4\u9ad8\u6548\u5730\u9032\u884c DOM \u66f4\u65b0\u3002<\/p>\n

\u4f7f\u7528 v-bind:key \u7684\u7bc4\u4f8b<\/h2>\n

\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u7bc4\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u5229\u7528 v-bind:key \u5c6c\u6027\u4f86\u7d81\u5b9a\u7d44\u4ef6\uff1a<\/p>\n

\nVue.component('my-component', {\n  props: ['myProp'],\n  template: '
{{ myProp }}<\/div>'\n});\n<\/code><\/pre>\n
\u5728\u9019\u500b\u7bc4\u4f8b\u4e2d\uff0c\u6211\u5011\u5275\u5efa\u4e86\u4e00\u500b\u540d\u70ba my-component<\/code> \u7684\u7d44\u4ef6\uff0c\u4e26\u901a\u904e props \u63a5\u6536 myProp<\/code> \u5c6c\u6027\u3002<\/p>\n
\u61c9\u7528 v-bind:key<\/h3>\n
\u63a5\u4e0b\u4f86\uff0c\u6211\u5011\u5c07\u9019\u500b\u7d44\u4ef6\u61c9\u7528\u5230\u4e00\u500b Vue \u5be6\u4f8b\u4e2d\uff0c\u4e26\u4f7f\u7528 v-bind:key \u9032\u884c\u7d81\u5b9a\uff1a<\/p>\n
\nnew Vue({\n  el: '#app',\n  data: {\n    items: ['Item 1', 'Item 2', 'Item 3']\n  },\n  template: `\n    
\n      \n      <\/my-component>\n    <\/div>\n  `\n});\n<\/code><\/pre>\n
\u5728\u9019\u500b\u7bc4\u4f8b\u4e2d\uff0c\u6211\u5011\u5b9a\u7fa9\u4e86\u4e00\u500b items<\/code> \u9663\u5217\uff0c\u4e26\u4f7f\u7528 v-for<\/code> \u6e32\u67d3\u6bcf\u500b\u9805\u76ee\u3002\u901a\u904e v-bind:key=\"item\"<\/code>\uff0c\u6211\u5011\u70ba\u6bcf\u500b\u7d44\u4ef6\u63d0\u4f9b\u4e86\u4e00\u500b\u552f\u4e00\u7684\u9375\uff0c\u9019\u6a23 Vue \u5c31\u80fd\u66f4\u6709\u6548\u5730\u8ddf\u8e2a\u6bcf\u500b\u7d44\u4ef6\u7684\u72c0\u614b\u3002<\/p>\n
\u932f\u8aa4\u6392\u9664<\/h2>\n
\u5728\u4f7f\u7528 v-bind:key \u6642\uff0c\u53ef\u80fd\u6703\u9047\u5230\u4e00\u4e9b\u5e38\u898b\u932f\u8aa4\uff1a<\/p>\n
    \n
  • \u7f3a\u5c11\u552f\u4e00\u6027\uff1a<\/strong>\u78ba\u4fdd\u63d0\u4f9b\u7684 key \u662f\u552f\u4e00\u7684\uff0c\u5426\u5247\u6703\u5c0e\u81f4\u66f4\u65b0\u6642\u51fa\u73fe\u610f\u5916\u884c\u70ba\u3002<\/li>\n
  • \u4e0d\u5fc5\u8981\u7684\u91cd\u7e6a\uff1a<\/strong>\u7576\u6578\u64da\u6c92\u6709\u8b8a\u5316\u6642\uff0c\u4f7f\u7528 key \u4e5f\u53ef\u4ee5\u907f\u514d\u4e0d\u5fc5\u8981\u7684 DOM \u66f4\u65b0\u3002<\/li>\n<\/ul>\n
    \u5ef6\u4f38\u61c9\u7528<\/h2>\n
    \u9664\u4e86\u57fa\u672c\u7684\u7d44\u4ef6\u7d81\u5b9a\uff0cv-bind:key \u9084\u53ef\u4ee5\u8207\u5176\u4ed6 Vue \u529f\u80fd\u7d50\u5408\u4f7f\u7528\uff0c\u4f8b\u5982\u904e\u6e21\u6548\u679c\u3001\u5217\u8868\u7684\u52d5\u614b\u63d2\u5165\/\u522a\u9664\u7b49\uff0c\u4ee5\u63d0\u5347\u7528\u6236\u9ad4\u9a57\u3002<\/p>\n
    \u7d50\u8ad6<\/h2>\n
    \u5728 Vue.js \u4e2d\u4f7f\u7528 v-bind:key \u9032\u884c\u7d44\u4ef6\u7684\u7279\u6b8a\u5c6c\u6027\u7d81\u5b9a\uff0c\u80fd\u6709\u6548\u63d0\u5347\u61c9\u7528\u7684\u6027\u80fd\u8207\u9748\u6d3b\u6027\u3002\u638c\u63e1\u9019\u9805\u6280\u8853\u5f8c\uff0c\u4f60\u5c07\u80fd\u5920\u66f4\u81ea\u4fe1\u5730\u958b\u767c\u8907\u96dc\u7684 Vue \u61c9\u7528\u7a0b\u5f0f\u3002<\/p>\n
    Q&A\uff08\u5e38\u898b\u554f\u984c\u89e3\u7b54\uff09<\/h2>\n
    Q1: \u70ba\u4ec0\u9ebc\u9700\u8981\u4f7f\u7528 key\uff1f<\/h3>\n
    A1: \u4f7f\u7528 key \u53ef\u4ee5\u5e6b\u52a9 Vue \u66f4\u6e96\u78ba\u5730\u8ffd\u8e2a\u6bcf\u500b\u7d44\u4ef6\u7684\u72c0\u614b\uff0c\u5f9e\u800c\u63d0\u9ad8\u6027\u80fd\u548c\u6b63\u78ba\u6e32\u67d3\u3002<\/p>\n
    Q2: key \u53ef\u4ee5\u662f\u4ec0\u9ebc\u985e\u578b\uff1f<\/h3>\n
    A2: key \u53ef\u4ee5\u662f\u5b57\u7b26\u4e32\u6216\u6578\u5b57\uff0c\u4f46\u5fc5\u9808\u662f\u552f\u4e00\u7684\uff0c\u6700\u597d\u4f7f\u7528\u6578\u64da\u5eab\u4e2d\u7684\u552f\u4e00\u8b58\u5225\u78bc\u3002<\/p>\n
    Q3: \u4f7f\u7528 v-bind:key \u6709\u6c92\u6709\u4ec0\u9ebc\u9650\u5236\uff1f<\/h3>\n
    A3: v-bind:key \u4e3b\u8981\u7528\u65bc\u7d44\u4ef6\u7684\u5217\u8868\u6e32\u67d3\uff0c\u4e26\u4e0d\u9069\u7528\u65bc\u55ae\u500b\u7d44\u4ef6\u7684\u7d81\u5b9a\u3002<\/p>\n
    —<\/p>\n","protected":false},"excerpt":{"rendered":"
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