{"id":8345,"date":"2023-11-28T20:25:46","date_gmt":"2023-11-28T12:25:46","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=8345"},"modified":"2023-12-02T22:37:15","modified_gmt":"2023-12-02T14:37:15","slug":"vue-zhong-wei-shen-me-shi-yongkey","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/11\/28\/vue-zhong-wei-shen-me-shi-yongkey\/","title":{"rendered":"Vue \u4e2d\u4e3a\u4ec0\u4e48\u4f7f\u7528 key\uff1f"},"content":{"rendered":"

\u5728 Vue \u4e2d\u4f7f\u7528 key<\/code> \u4e3b\u8981\u662f\u4e3a\u4e86\u5728 Vue \u7684\u5217\u8868\u6e32\u67d3\u65f6\uff0c\u4f18\u5316 DOM \u7684 diff \u7b97\u6cd5\uff0c\u5e2e\u52a9 Vue \u66f4\u9ad8\u6548\u5730\u7ba1\u7406\u53ef\u590d\u7528\u7684\u5143\u7d20\u3002<\/p>\n

<\/span><\/a>\u4e3a\u4ec0\u4e48\u4f7f\u7528 key\uff1a<\/h3>\n
    \n
  1. \n

    \u63d0\u9ad8\u6027\u80fd\uff1a<\/strong> \u5f53 Vue \u901a\u8fc7 v-for<\/code> \u6e32\u67d3\u5217\u8868\u65f6\uff0c\u5b83\u4f1a\u5c3d\u91cf\u9ad8\u6548\u5730\u590d\u7528\u5df2\u7ecf\u5b58\u5728\u7684 DOM \u5143\u7d20\u3002\u4f46\u662f\uff0c\u5982\u679c\u5217\u8868\u4e2d\u7684\u67d0\u4e9b\u9879\u7684\u987a\u5e8f\u53d1\u751f\u53d8\u5316\uff0c\u6216\u8005\u6709\u65b0\u7684\u9879\u63d2\u5165\uff0c\u6ca1\u6709\u4f7f\u7528 key<\/code> \u7684\u60c5\u51b5\u4e0b Vue \u53ef\u80fd\u4f1a\u91cd\u65b0\u6e32\u67d3\u6574\u4e2a\u5217\u8868\uff0c\u800c\u4e0d\u662f\u53ea\u662f\u79fb\u52a8\u6216\u63d2\u5165\u65b0\u7684\u9879\u3002<\/p>\n<\/li>\n

  2. \n

    \u552f\u4e00\u6027\u6807\u8bc6\uff1a<\/strong> \u4f7f\u7528 key<\/code> \u53ef\u4ee5\u4e3a Vue \u63d0\u4f9b\u4e00\u4e2a\u552f\u4e00\u6807\u8bc6\uff0c\u4f7f Vue \u80fd\u591f\u533a\u5206\u6bcf\u4e2a\u9879\uff0c\u786e\u4fdd\u5728\u66f4\u65b0\u65f6\u53ea\u5bf9\u9700\u8981\u6539\u53d8\u7684\u90e8\u5206\u8fdb\u884c\u64cd\u4f5c\uff0c\u800c\u4e0d\u4f1a\u91cd\u65b0\u6e32\u67d3\u6574\u4e2a\u5217\u8868\u3002<\/p>\n<\/li>\n<\/ol>\n

    <\/span><\/a>\u5982\u4f55\u4f7f\u7528 key\uff1a<\/h3>\n

    \u5728 Vue \u7684\u5217\u8868\u6e32\u67d3\u4e2d\uff0c\u4f7f\u7528 v-bind:key<\/code> \u6216\u7b80\u5199\u7684 :key<\/code> \u6765\u4e3a\u6bcf\u4e2a\u9879\u6307\u5b9a\u4e00\u4e2a\u552f\u4e00\u7684 key \u503c\u3002<\/p>\n

    <template>\n  <div>\n    <div v-for="item in items" :key="item.id">\n      {{ item.name }}\n    <\/div>\n  <\/div>\n<\/template>\n\n<script>\nexport default {\n  data() {\n    return {\n      items: [\n        { id: 1, name: 'Item 1' },\n        { id: 2, name: 'Item 2' },\n        \/\/ ...\n      ],\n    };\n  },\n};\n<\/script>\n<\/code><\/pre>\n
    \u786e\u4fdd key<\/code> \u662f\u6bcf\u4e2a\u9879\u4e2d\u552f\u4e00\u4e14\u7a33\u5b9a\u7684\uff0c\u4e0d\u63a8\u8350\u4f7f\u7528\u7d22\u5f15\u4f5c\u4e3a key<\/code> \u503c\uff0c\u7279\u522b\u662f\u5f53\u5217\u8868\u6570\u636e\u53ef\u80fd\u4f1a\u52a8\u6001\u53d8\u5316\u65f6\uff0c\u8fd9\u53ef\u80fd\u4f1a\u5bfc\u81f4\u4e00\u4e9b\u610f\u5916\u7684\u95ee\u9898\u3002\u4f7f\u7528\u5177\u6709\u552f\u4e00\u6807\u8bc6\u7684\u5c5e\u6027\uff0c\u6bd4\u5982\u552f\u4e00\u7684 ID\uff0c\u53ef\u4ee5\u66f4\u597d\u5730\u4fdd\u8bc1\u5217\u8868\u6e32\u67d3\u7684\u7a33\u5b9a\u6027\u548c\u6027\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
    \u5728 Vue \u4e2d\u4f7f\u7528 key \u4e3b\u8981\u662f\u4e3a\u4e86\u5728 Vue \u7684\u5217\u8868\u6e32\u67d3\u65f6\uff0c\u4f18\u5316 DOM \u7684 diff \u7b97\u6cd5\uff0c\u5e2e\u52a9 Vue […]<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[114],"tags":[],"class_list":["post-8345","post","type-post","status-publish","format-standard","hentry","category-vue"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/8345","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=8345"}],"version-history":[{"count":2,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/8345\/revisions"}],"predecessor-version":[{"id":14101,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/8345\/revisions\/14101"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=8345"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=8345"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=8345"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}