{"id":7987,"date":"2023-11-28T20:09:33","date_gmt":"2023-11-28T12:09:33","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=7987"},"modified":"2023-12-02T21:03:57","modified_gmt":"2023-12-02T13:03:57","slug":"vue-zhong-zai-shuo-yi-xia-xu-nidom-yi-jikey-shu-xi","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/11\/28\/vue-zhong-zai-shuo-yi-xia-xu-nidom-yi-jikey-shu-xi\/","title":{"rendered":"Vue \u4e2d\u518d\u8bf4\u4e00\u4e0b\u865a\u62df Dom \u4ee5\u53ca key \u5c5e\u6027\u7684\u4f5c\u7528\uff1f"},"content":{"rendered":"

\u865a\u62df DOM\uff08Virtual DOM\uff09\u662f Vue \u548c\u5176\u4ed6\u73b0\u4ee3 JavaScript \u6846\u67b6\uff08\u5982React\uff09\u4e2d\u7684\u4e00\u79cd\u6280\u672f\uff0c\u7528\u4e8e\u63d0\u9ad8\u6027\u80fd\u5e76\u4f18\u5316 DOM \u66f4\u65b0\u7684\u6548\u7387\u3002<\/p>\n

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key<\/code> \u5c5e\u6027\u5728 Vue \u4e2d\u7528\u4e8e\u5e2e\u52a9 Vue \u8bc6\u522b\u8282\u70b9\u7684\u552f\u4e00\u6027\uff0c\u901a\u5e38\u7528\u4e8e\u4f18\u5316\u5217\u8868\u6e32\u67d3\u65f6\u7684\u6027\u80fd\u3002\u5f53 Vue \u66f4\u65b0\u5217\u8868\u65f6\uff0c\u901a\u8fc7\u7ed9\u6bcf\u4e2a\u8282\u70b9\u8bbe\u7f6e\u552f\u4e00\u7684 key<\/code>\uff0cVue \u53ef\u4ee5\u66f4\u51c6\u786e\u5730\u8ffd\u8e2a\u6bcf\u4e2a\u8282\u70b9\u7684\u53d8\u5316\uff0c\u4ece\u800c\u63d0\u9ad8\u5217\u8868\u6e32\u67d3\u7684\u6548\u7387\u3002<\/p>\n

\u5728\u5217\u8868\u6e32\u67d3\u4e2d\uff0c\u5982\u679c\u4e0d\u7ed9\u5217\u8868\u4e2d\u7684\u5143\u7d20\u8bbe\u7f6e key<\/code>\uff0cVue \u5728\u8fdb\u884c\u66f4\u65b0\u65f6\u53ef\u80fd\u4f1a\u51fa\u73b0\u4e00\u4e9b\u95ee\u9898\uff0c\u6bd4\u5982\u91cd\u65b0\u6392\u5e8f\u6216\u5220\u9664\u5217\u8868\u4e2d\u7684\u5143\u7d20\u65f6\u53ef\u80fd\u4f1a\u5bfc\u81f4\u4e0d\u5fc5\u8981\u7684\u91cd\u65b0\u6e32\u67d3\u3002\u901a\u8fc7\u8bbe\u7f6e key<\/code>\uff0cVue \u53ef\u4ee5\u8bc6\u522b\u6bcf\u4e2a\u8282\u70b9\uff0c\u786e\u4fdd\u6b63\u786e\u5730\u66f4\u65b0\u3001\u91cd\u7528\u548c\u5220\u9664\u5143\u7d20\uff0c\u907f\u514d\u4e0d\u5fc5\u8981\u7684 DOM \u64cd\u4f5c\uff0c\u63d0\u9ad8\u6027\u80fd\u3002<\/p>\n

\u793a\u4f8b\uff1a<\/p>\n

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\u5728\u8fd9\u4e2a\u793a\u4f8b\u4e2d\uff0cv-for<\/code> \u5faa\u73af\u6e32\u67d3 items<\/code> \u6570\u7ec4\u4e2d\u7684\u5143\u7d20\uff0c\u901a\u8fc7 :key="item.id"<\/code> \u7ed9\u6bcf\u4e2a\u5143\u7d20\u8bbe\u7f6e\u4e86\u552f\u4e00\u7684 id<\/code> \u4f5c\u4e3a key<\/code>\uff0c\u8fd9\u6837 Vue \u5c31\u80fd\u66f4\u597d\u5730\u7ba1\u7406\u5217\u8868\u5143\u7d20\u7684\u53d8\u5316\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u865a\u62df DOM\uff08Virtual DOM\uff09\u662f Vue \u548c\u5176\u4ed6\u73b0\u4ee3 JavaScript \u6846\u67b6\uff08\u5982React\uff09\u4e2d\u7684\u4e00 […]<\/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-7987","post","type-post","status-publish","format-standard","hentry","category-vue"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/7987","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=7987"}],"version-history":[{"count":2,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/7987\/revisions"}],"predecessor-version":[{"id":14012,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/7987\/revisions\/14012"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=7987"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=7987"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=7987"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}