{"id":170878,"date":"2024-05-08T17:17:04","date_gmt":"2024-05-08T09:17:04","guid":{"rendered":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/170878.html"},"modified":"2024-05-08T17:17:06","modified_gmt":"2024-05-08T09:17:06","slug":"javascript-vue-%e6%94%af%e6%8c%81%e8%bf%99%e7%a7%8d%e9%81%8d%e5%8e%86%e6%96%b9%e5%bc%8f%e5%90%97","status":"publish","type":"post","link":"https:\/\/docs.pingcode.com\/ask\/ask-ask\/170878.html","title":{"rendered":"JavaScript vue \u652f\u6301\u8fd9\u79cd\u904d\u5386\u65b9\u5f0f\u5417"},"content":{"rendered":"

\"JavaScript<\/p>\n

JavaScript Vue\u6846\u67b6\u786e\u5b9e\u652f\u6301\u591a\u79cd\u904d\u5386\u65b9\u5f0f\uff0c\u4ee5\u9ad8\u6548\u5904\u7406\u5217\u8868\u6e32\u67d3\u548c\u6570\u636e\u5c55\u793a\u3002\u5176\u4e2d\u6700\u5e38\u7528\u7684\u904d\u5386\u65b9\u6cd5\u5305\u62ecv-for\u6307\u4ee4\u3001\u8ba1\u7b97\u5c5e\u6027\u548cwatchers\u3001JavaScript\u539f\u751f\u7684\u904d\u5386\u65b9\u6cd5\u904d\u8054\u5408Vue\u54cd\u5e94\u5f0f\u7cfb\u7edf\u4f7f\u7528<\/strong>\u3002\u8fd9\u4e9b\u65b9\u6cd5\u4e0d\u4ec5\u63d0\u4f9b\u4e86\u4e0d\u540c\u573a\u666f\u4e0b\u6570\u636e\u5904\u7406\u7684\u7075\u6d3b\u6027\uff0c\u8fd8\u4fdd\u8bc1\u4e86\u754c\u9762\u4e0e\u6570\u636e\u72b6\u6001\u7684\u540c\u6b65\u66f4\u65b0\u3002\u5728\u8fd9\u4e9b\u904d\u5386\u65b9\u5f0f\u4e2d\uff0cv-for\u6307\u4ee4<\/strong>\u5c24\u5176\u503c\u5f97\u6df1\u5165\u63a2\u8ba8\u3002<\/p>\n<\/p>\n

V-FOR\u6307\u4ee4<\/strong><\/h3>\n<\/p>\n

Vue\u4e2d\u7684v-for\u6307\u4ee4\u662f\u6700\u76f4\u63a5\u3001\u9ad8\u6548\u7684\u5217\u8868\u6e32\u67d3\u65b9\u6cd5\u3002\u5b83\u53ef\u4ee5\u904d\u5386\u6570\u7ec4\u3001\u5bf9\u8c61\u751a\u81f3\u662f\u4e00\u4e2a\u6570\u5b57\u7684\u8303\u56f4\uff0c\u521b\u5efa\u4e00\u4e2a\u6a21\u677f\u5143\u7d20\u7684\u591a\u4e2a\u5b9e\u4f8b\u3002\u6bcf\u4e2a\u5b9e\u4f8b\u90fd\u80fd\u8bbf\u95ee\u5230\u904d\u5386\u5bf9\u8c61\u7684\u5f53\u524d\u9879\u3001\u5f53\u524d\u7d22\u5f15\u7b49\u4fe1\u606f\uff0c\u6781\u5927\u5730\u7b80\u5316\u4e86\u52a8\u6001\u5217\u8868\u7684\u751f\u6210\u548c\u66f4\u65b0\u3002<\/p>\n<\/p>\n

\u57fa\u672c\u4f7f\u7528<\/strong><\/h4>\n<\/p>\n

\u5728\u4f7f\u7528v-for\u904d\u5386\u6570\u7ec4\u65f6\uff0c\u53ef\u4ee5\u4e3a\u6570\u7ec4\u7684\u6bcf\u4e2a\u5143\u7d20\u751f\u6210\u76f8\u5e94\u7684DOM\u5143\u7d20\u3002\u4f8b\u5982\uff0c\u5982\u679c\u60f3\u8981\u6e32\u67d3\u4e00\u4e2a\u9879\u76ee\u5217\u8868\uff0c\u53ea\u9700\u5c06v-for\u6307\u4ee4\u6dfb\u52a0\u5230\u8868\u793a\u9879\u76ee\u7684\u6a21\u677f\u5143\u7d20\u4e0a\uff0c\u5e76\u6307\u5b9a\u8981\u904d\u5386\u7684\u6570\u7ec4\u5373\u53ef\u3002Vue\u4f1a\u81ea\u52a8\u4e3a\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e2a\u9879\u76ee\u521b\u5efa\u3001\u66f4\u65b0\u548c\u5220\u9664\u5143\u7d20\u3002<\/p>\n<\/p>\n

\u7ec6\u8282\u4f18\u5316<\/strong><\/h4>\n<\/p>\n

\u4f7f\u7528v-for\u65f6\uff0c\u63a8\u8350\u540c\u65f6\u4f7f\u7528v-bind:key\u6307\u4ee4\u7ed1\u5b9a\u4e00\u4e2a\u552f\u4e00key\u503c\u3002\u8fd9\u4e2akey\u503c\u6709\u52a9\u4e8eVue\u5185\u90e8\u8ddf\u8e2a\u6bcf\u4e2a\u8282\u70b9\u7684\u8eab\u4efd\uff0c\u4ece\u800c\u91cd\u7528\u548c\u91cd\u65b0\u6392\u5e8f\u73b0\u6709\u5143\u7d20\uff0c\u663e\u8457\u63d0\u9ad8\u66f4\u65b0\u6e32\u67d3\u6027\u80fd\u3002<\/p>\n<\/p>\n

\u8ba1\u7b97\u5c5e\u6027\u548cWATCHERS<\/strong><\/h3>\n<\/p>\n

\u8ba1\u7b97\u5c5e\u6027\u548cwatchers\u63d0\u4f9b\u4e86\u4e00\u79cd\u66f4\u7ec6\u7c92\u5ea6\u7684\u904d\u5386\u6570\u636e\u65b9\u5f0f\uff0c\u5c24\u5176\u9002\u5408\u5904\u7406\u590d\u6742\u903b\u8f91\u6216\u5bf9\u6570\u636e\u8fdb\u884c\u52a0\u5de5\u540e\u518d\u5c55\u793a\u7684\u573a\u666f\u3002<\/p>\n<\/p>\n

\u8ba1\u7b97\u5c5e\u6027<\/strong><\/h4>\n<\/p>\n

\u8ba1\u7b97\u5c5e\u6027\u662f\u57fa\u4e8e\u5b83\u4eec\u7684\u4f9d\u8d56\u8fdb\u884c\u7f13\u5b58\u7684\u3002\u53ea\u5728\u76f8\u5173\u54cd\u5e94\u5f0f\u4f9d\u8d56\u53d1\u751f\u6539\u53d8\u65f6\u5b83\u4eec\u624d\u4f1a\u91cd\u65b0\u6c42\u503c\u3002\u8fd9\u610f\u5473\u7740\u53ea\u8981\u4f9d\u8d56\u672a\u53d8\uff0c\u8ba1\u7b97\u5c5e\u6027\u5c31\u4e0d\u4f1a\u91cd\u65b0\u6267\u884c\uff0c\u4ece\u800c\u4fdd\u8bc1\u4e86\u6027\u80fd\u7684\u4f18\u5316\u3002\u8ba1\u7b97\u5c5e\u6027\u5728\u5904\u7406\u6570\u7ec4\u548c\u5bf9\u8c61\u7684\u8fc7\u6ee4\u3001\u6392\u5e8f\u7b49\u64cd\u4f5c\u65f6\u7279\u522b\u6709\u7528\u3002<\/p>\n<\/p>\n

Watchers<\/strong><\/h4>\n<\/p>\n

\u76f8\u6bd4\u8ba1\u7b97\u5c5e\u6027\uff0cwatchers\u7528\u4e8e\u6267\u884c\u5bf9\u6570\u636e\u53d8\u5316\u7684\u5f02\u6b65\u54cd\u5e94\u3002\u5f53\u4f60\u60f3\u8981\u5728\u6570\u636e\u53d8\u5316\u65f6\u6267\u884c\u66f4\u4e3a\u590d\u6742\u7684\u64cd\u4f5c\u3001\u8c03\u7528\u5f02\u6b65API\u6216\u6267\u884c\u8f83\u4e3a\u8017\u65f6\u7684\u5904\u7406\u65f6\uff0cwatchers\u662f\u4e00\u4e2a\u7406\u60f3\u7684\u9009\u62e9\u3002\u5b83\u4eec\u63d0\u4f9b\u4e86\u4e00\u79cd\u7075\u6d3b\u7684\u65b9\u5f0f\u53bb\u54cd\u5e94\u6570\u636e\u7684\u53d8\u5316\uff0c\u652f\u6301\u5728\u6570\u636e\u53d8\u5316\u65f6\u6267\u884c\u4efb\u610f\u903b\u8f91\u3002<\/p>\n<\/p>\n

JS\u539f\u751f\u904d\u5386\u65b9\u6cd5<\/strong><\/h3>\n<\/p>\n

Vue\u4e0d\u4ec5\u9650\u4e8e\u4f7f\u7528\u81ea\u8eab\u7684\u6307\u4ee4\u6216\u54cd\u5e94\u5f0f\u7cfb\u7edf\u8fdb\u884c\u6570\u636e\u904d\u5386\uff0c\u5b83\u5b8c\u5168\u517c\u5bb9JavaScript\u539f\u751f\u7684\u904d\u5386\u65b9\u6cd5\uff0c\u6bd4\u5982forEach\u3001map\u3001filter\u7b49\u3002\u4f60\u53ef\u4ee5\u5728Vue\u7684\u65b9\u6cd5\u4e2d\u6216\u8ba1\u7b97\u5c5e\u6027\u4e2d\u4f7f\u7528\u8fd9\u4e9bJavaScript\u539f\u751f\u65b9\u6cd5\u6765\u5904\u7406\u6570\u636e\u3002<\/p>\n<\/p>\n

\u7ed3\u5408\u54cd\u5e94\u5f0f\u7cfb\u7edf\u4f7f\u7528<\/strong><\/h4>\n<\/p>\n

\u867d\u7136Vue\u7684\u54cd\u5e94\u5f0f\u7cfb\u7edf\u4e0d\u4f1a\u62e6\u622a\u8fd9\u4e9bJavaScript\u539f\u751f\u65b9\u6cd5\u7684\u8c03\u7528\uff0c\u4f46\u4f60\u4ecd\u53ef\u4ee5\u5728\u5176\u7ed3\u679c\u4e0a\u5e94\u7528Vue\u7684\u54cd\u5e94\u5f0f\u539f\u7406\uff0c\u4f8b\u5982\uff0c\u4f7f\u7528\u8ba1\u7b97\u5c5e\u6027\u8fd4\u56de\u7ecf\u8fc7\u5904\u7406\u7684\u6570\u636e\u6570\u7ec4\u3002\u8fd9\u79cd\u65b9\u6cd5\u7ed3\u5408\u4e86JavaScript\u7684\u7075\u6d3b\u6027\u548cVue\u7684\u54cd\u5e94\u5f0f\u7279\u6027\uff0c\u4e3a\u590d\u6742\u7684\u6570\u636e\u5904\u7406\u63d0\u4f9b\u4e86\u6709\u6548\u7684\u89e3\u51b3\u9014\u5f84\u3002<\/p>\n<\/p>\n

\u603b\u7ed3<\/strong><\/h3>\n<\/p>\n

Vue\u6846\u67b6\u63d0\u4f9b\u7684\u904d\u5386\u65b9\u5f0f\u4e0d\u4ec5\u4e30\u5bcc\u591a\u6837\uff0c\u800c\u4e14\u5404\u5177\u7279\u8272\uff0c\u65e2\u5305\u62ec\u4e86\u9488\u5bf9\u521d\u5b66\u8005\u53cb\u597d\u7684v-for\u6307\u4ee4\uff0c\u4e5f\u6db5\u76d6\u4e86\u66f4\u9ad8\u7ea7\u7684\u6570\u636e\u5904\u7406\u65b9\u6cd5\uff0c\u5982\u8ba1\u7b97\u5c5e\u6027\u548cwatchers\u3002\u8fd9\u4e9b\u904d\u5386\u65b9\u5f0f\u4f7f\u5f97Vue\u5728\u5904\u7406\u5404\u79cd\u5217\u8868\u6e32\u67d3\u548c\u6570\u636e\u5c55\u793a\u573a\u666f\u65f6\u90fd\u8868\u73b0\u51fa\u5353\u8d8a\u7684\u6027\u80fd\u548c\u7075\u6d3b\u6027\u3002\u6700\u7ec8\uff0c\u901a\u8fc7\u719f\u7ec3\u8fd0\u7528\u8fd9\u4e9b\u904d\u5386\u65b9\u6cd5\uff0c\u53ef\u4ee5\u6781\u5927\u5730\u63d0\u5347Vue\u5e94\u7528\u7684\u6027\u80fd\u548c\u7528\u6237\u4f53\u9a8c\u3002<\/p>\n<\/p>\n

\u76f8\u5173\u95ee\u7b54FAQs\uff1a<\/strong><\/h2>\n

1. JavaScript vue \u5982\u4f55\u8fdb\u884c\u904d\u5386\u64cd\u4f5c\uff1f<\/strong>
\nVue.js \u63d0\u4f9b\u4e86\u4e00\u4e2a\u6307\u4ee4 v-for\uff0c\u53ef\u4ee5\u7528\u4e8e\u5728\u6a21\u677f\u4e2d\u5faa\u73af\u6e32\u67d3\u5217\u8868\u6570\u636e\u3002\u901a\u8fc7 v-for\uff0c\u4f60\u53ef\u4ee5\u5f88\u5bb9\u6613\u5730\u5728 Vue \u5b9e\u4f8b\u4e2d\u904d\u5386\u6570\u7ec4\u6216\u5bf9\u8c61\uff0c\u751f\u6210\u76f8\u5e94\u7684\u6a21\u677f\u5185\u5bb9\u3002\u4f8b\u5982\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528 v-for \u6765\u904d\u5386\u4e00\u4e2a\u6570\u7ec4\uff0c\u5e76\u4e3a\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u751f\u6210\u4e00\u4e2a\u5217\u8868\u9879\uff0c\u6216\u8005\u4f7f\u7528 v-for \u904d\u5386\u4e00\u4e2a\u5bf9\u8c61\u7684\u5c5e\u6027\u3002<\/p>\n

2. Vue \u4e2d v-for \u4e0e\u5bf9\u8c61\u7684\u904d\u5386\u65b9\u5f0f\u6709\u4ec0\u4e48\u533a\u522b\uff1f<\/strong>
\n\u5f53\u4f7f\u7528 v-for \u6765\u904d\u5386\u5bf9\u8c61\u5c5e\u6027\u65f6\uff0cVue.js \u4f1a\u81ea\u52a8\u8fed\u4ee3\u5bf9\u8c61\u7684\u5c5e\u6027\uff0c\u5e76\u4e3a\u6bcf\u4e2a\u5c5e\u6027\u751f\u6210\u5bf9\u5e94\u7684\u6a21\u677f\u5757\u3002\u904d\u5386\u6570\u7ec4\u65f6\uff0cv-for \u7684\u8bed\u6cd5\u76f8\u5bf9\u7b80\u5355\uff0c\u800c\u904d\u5386\u5bf9\u8c61\u65f6\uff0c\u4f60\u9700\u8981\u4f7f\u7528 v-for \u7684\u7279\u6b8a\u8bed\u6cd5\u6765\u83b7\u53d6\u5bf9\u8c61\u7684 key \u548c value\u3002<\/p>\n

3. Vue \u7684 v-for \u6307\u4ee4\u6709\u54ea\u4e9b\u5e38\u7528\u7684\u7528\u6cd5\uff1f<\/strong>
\nv-for \u6307\u4ee4\u4e0d\u4ec5\u53ef\u4ee5\u7528\u4e8e\u7b80\u5355\u7684\u5217\u8868\u6e32\u67d3\uff0c\u8fd8\u53ef\u4ee5\u7528\u4e8e\u590d\u6742\u7684\u5faa\u73af\u64cd\u4f5c\u3002\u9664\u4e86\u57fa\u672c\u7684\u904d\u5386\u6570\u7ec4\u548c\u5bf9\u8c61\uff0cv-for \u8fd8\u652f\u6301\u5faa\u73af\u904d\u5386\u6570\u5b57\u8303\u56f4\u3001\u904d\u5386\u8fc7\u6ee4\u540e\u7684\u6570\u7ec4\u7b49\u3002\u5728\u4f7f\u7528 v-for \u65f6\uff0c\u4f60\u8fd8\u53ef\u4ee5\u6307\u5b9a\u7d22\u5f15\u503c\u3001\u5e26\u6709\u6761\u4ef6\u5224\u65ad\u7684\u5faa\u73af\uff0c\u751a\u81f3\u53ef\u4ee5\u4f7f\u7528 v-for \u5728\u7ec4\u4ef6\u4e2d\u8fdb\u884c\u5d4c\u5957\u5faa\u73af\u3002\u8fd9\u4e9b\u7528\u6cd5\u53ef\u4ee5\u5e2e\u52a9\u4f60\u66f4\u7075\u6d3b\u5730\u5904\u7406\u4e0d\u540c\u7684\u60c5\u51b5\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"JavaScript Vue\u6846\u67b6\u786e\u5b9e\u652f\u6301\u591a\u79cd\u904d\u5386\u65b9\u5f0f\uff0c\u4ee5\u9ad8\u6548\u5904\u7406\u5217\u8868\u6e32\u67d3\u548c\u6570\u636e\u5c55\u793a\u3002\u5176\u4e2d\u6700\u5e38\u7528\u7684\u904d\u5386\u65b9\u6cd5\u5305\u62ecv […]","protected":false},"author":3,"featured_media":170883,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[37],"tags":[],"acf":[],"_links":{"self":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/170878"}],"collection":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/comments?post=170878"}],"version-history":[{"count":0,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/posts\/170878\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media\/170883"}],"wp:attachment":[{"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/media?parent=170878"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/categories?post=170878"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/docs.pingcode.com\/wp-json\/wp\/v2\/tags?post=170878"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}