<!DOCTYPE html> <html lang="zh"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"><script type="text/javascript" src='vue.min.js'></script> <title></title><script type="text/javascript"></script> <style type="text/css"> body{background: #ccc;} div{width: 100px;height: 100px;} .red{background: red;} </style> </head> <body> <input type="button" value='changed'> <div class="{{myDiv}}"></div> <script type="text/javascript"> new Vue({ el:'body', data:{ myDiv:'red' }, methods:{ } }); </script> </body> </html>
解释：
主要在于理解这两段代码。
第两段代码的意思是
效果：'red'>
<!DOCTYPE html> <html lang="zh"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <meta http-equiv="X-UA-Compatible" content="ie=edge"> <script type="text/javascript" src='vue.min.js'></script> <title></title> <style type="text/css"> body{background: #ccc;} div{width: 100px;height: 100px;} .red{background: red;} </style> </head> <body> <input type="button" value='changed'> <div v-bind:class='myDiv'></div> <script type="text/javascript"> new Vue({ el:'body', data:{ myDiv:'red', }, methods:{ } }) </script> </body> </html>
效果：
