{"id":57,"date":"2021-05-08T09:02:58","date_gmt":"2021-05-08T01:02:58","guid":{"rendered":"https:\/\/www.52dixiaowo.com\/vuejs\/?p=57"},"modified":"2021-06-02T11:37:22","modified_gmt":"2021-06-02T03:37:22","slug":"v-if%e5%88%a4%e6%96%ad%e8%af%ad%e5%8f%a5","status":"publish","type":"post","link":"https:\/\/www.52dixiaowo.com\/vuejs\/post-57.html","title":{"rendered":"v-if\u5224\u65ad\u8bed\u53e5"},"content":{"rendered":"\n

if -- else<\/code>\u662f\u6700\u57fa\u672c\u7684\u6d41\u7a0b\u63a7\u5236\u8bed\u53e5, \u4e3b\u8981\u5305\u62ec if<\/code>, if else<\/code>, \u4ee5\u53ca if else if<\/code> , \u4ee5\u53ca if\u5d4c\u5957<\/code>, \u7528\u6cd5\u4e8e JavaScript \u76f8\u5dee\u4e0d\u5927<\/p>\n\n\n\n

<script src=\"https:\/\/cdn.jsdelivr.net\/npm\/vue\/dist\/vue.js\"><\/script>\n<h2>vue\u7684if-else\u4f8b\u5b50<\/h2>\n<div id=\"app\">\n\t<p v-if=\"name=='\u5f20\u4e09'\">\u6211\u7684\u540d\u5b57\u53eb\u5f20\u4e09<\/p>\n\t<p v-else-if=\"name=='\u674e\u56db'\">\u6211\u7684\u540d\u5b57\u53eb\u674e\u56db<\/p>\n\t<p v-else>\u6211\u4e0d\u662f\u5f20\u4e09\u4e5f\u4e0d\u662f\u674e\u56db<\/p>\n<\/div>\n<script>\n\tvar vm = new Vue({\n\t\tel:'#app',\n\t\tdata:{\n\t\t\tname:'\u5f20\u4e09',\n\t\t\tage:18\n\t\t}\n\t});\n<\/script><\/code><\/pre>\n\n\n\n
template\u6a21\u677f<\/strong><\/p>\n\n\n\n
\u5728 vue \u4e2d, \u5982\u679c\u60f3\u4f7f\u7528 if else \u63a7\u5236\u591a\u4e2ahtml\u8bed\u53e5, \u4f7f\u7528 vue \u7279\u6709\u7684 template<\/code> \u6a21\u677f<\/p>\n\n\n\n
\u4f60\u9700\u8981\u6ce8\u610f, template \u6a21\u677f\u9ed8\u8ba4\u662f\u9690\u85cf\u7684, display:none, \u5728\u6a21\u677f\u6fc0\u6d3b\u524d\u90fd\u770b\u4e0d\u89c1<\/p>\n\n\n\n
<script src=\"https:\/\/cdn.jsdelivr.net\/npm\/vue\/dist\/vue.js\"><\/script>\n<h2>vue\u7684template\u6a21\u677f\u5b9e\u4f8b<\/h2>\n<div id=\"app\">\n<p>\t\u591a\u6761\u8bed\u53e5\u662f\u5426\u663e\u793a,\u5728template\u4e2d<\/p>\n<hr>\n<template v-if=\"ss2\">\n\t<h1>\u8fd9\u662f\u7b2c\u4e00\u4e2a\u8bed\u53e5<\/h1>\n\t<p>\u8fd9\u662f\u7b2c\u4e8c\u4e2a\u8bed\u53e5<\/p>\n\t<hr>\n<\/template>\n<template v-else>\n\t\u591a\u4e2a\u4e0d\u663e\u793a\u7684\u8bed\u53e5\n\t<p>\u54c8\u54c8\u54c8<\/p>\n\t<h1>\u563f\u563f<\/h1>\n<\/template>\n<\/div>\n<script>\n\tvar vm = new Vue({\n\t\tel:'#app',\n\t\tdata:{\n\t\t\tss2:true\n\t\t}\n\t\t});\n<\/script><\/code><\/pre>\n\n\n\n
key\u53c2\u6570<\/strong><\/p>\n\n\n\n
\u5f53\u524d\u5047\u8bbe\u4f60\u6709 2 \u4e2a input , \u5206\u522b\u662f\u8f93\u5165\u7528\u6237\u540d \u548c \u90ae\u7bb1, \u5f53\u7528\u6237\u5207\u6362\u767b\u5f55\u65f6\u4ec5\u4ec5\u5207\u6362placeholder, \u800c\u5728 input \u4e2d\u589e\u52a0\u4e00\u4e2a key \u53c2\u6570, \u5c31\u4e0d\u518d\u4fdd\u7559\u524d\u9762\u8f93\u5165\u7684\u6570\u636e.<\/span><\/p>\n\n\n\n
\"\"<\/figure>\n\n\n\n
<script src=\"https:\/\/cdn.jsdelivr.net\/npm\/vue\/dist\/vue.js\"><\/script>\n<h2>vue-if\u7684key\u53c2\u6570\u5b9e\u4f8b<\/h2>\n<div id=\"app\">\n<template v-if=\"loginType=='username'\">\n\t<hr>\n\t  <label>Username<\/label>\n\t  <input placeholder=\"Enter your username\" key=\"username-input\">\n\t<hr>\n<\/template>\n<template v-else>\n\t  <label>Email<\/label>\n\t  <input placeholder=\"Enter your email address\" key=\"email-input\">\n<\/template>\n<p><button v-on:click=\"changeType\">\u5207\u6362\u767b\u5f55<\/button><\/p>\n<\/div>\n<script>\n\tvar vm = new Vue({\n\t\tel:'#app',\n\t\tdata:{\n\t\t\tloginType:\"username\"\n\t\t},\n\t\tmethods:{\n\t\t\tchangeType(){\n\t\t\t\tif(this.loginType=='username'){\n\t\t\t\t\tthis.loginType = 'email';\n\t\t\t\t}else{\n\t\t\t\t\tthis.loginType='username';\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t\t});\n<\/script><\/code><\/pre>\n\n\n\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
if — else\u662f\u6700\u57fa\u672c\u7684\u6d41\u7a0b\u63a7\u5236\u8bed\u53e5, \u4e3b\u8981\u5305\u62ec if, if else, \u4ee5\u53ca if else if … \u7ee7\u7eed\u9605\u8bfb v-if\u5224\u65ad\u8bed\u53e5<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[4],"tags":[],"_links":{"self":[{"href":"https:\/\/www.52dixiaowo.com\/vuejs\/wp-json\/wp\/v2\/posts\/57"}],"collection":[{"href":"https:\/\/www.52dixiaowo.com\/vuejs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.52dixiaowo.com\/vuejs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.52dixiaowo.com\/vuejs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.52dixiaowo.com\/vuejs\/wp-json\/wp\/v2\/comments?post=57"}],"version-history":[{"count":4,"href":"https:\/\/www.52dixiaowo.com\/vuejs\/wp-json\/wp\/v2\/posts\/57\/revisions"}],"predecessor-version":[{"id":88,"href":"https:\/\/www.52dixiaowo.com\/vuejs\/wp-json\/wp\/v2\/posts\/57\/revisions\/88"}],"wp:attachment":[{"href":"https:\/\/www.52dixiaowo.com\/vuejs\/wp-json\/wp\/v2\/media?parent=57"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.52dixiaowo.com\/vuejs\/wp-json\/wp\/v2\/categories?post=57"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.52dixiaowo.com\/vuejs\/wp-json\/wp\/v2\/tags?post=57"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}