源代码 ：
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<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>Vue 测试实例 - 开源教程(ossoft.cn)</title> <script src="https://cdn.staticfile.org/vue/2.2.2/vue.min.js"></script> <style> .base { width: 100px; height: 100px; } .active { background: green; } .text-danger { background: red; } </style> </head> <body> <div id="app"> <div v-bind:class="classObject"></div> </div> <script> new Vue({ el: '#app', data: { isActive: true, error: { value: true, type: 'fatal' } }, computed: { classObject: function () { return { base: true, active: this.isActive && !this.error.value, 'text-danger': this.error.value && this.error.type === 'fatal', } } } }) </script> </body> </html>
运行结果