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源代码:
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<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>Vue 测试实例 - 小鸟启蒙(facesoho.com)</title> <script src="https://cdn.staticfile.org/vue/2.4.2/vue.min.js"></script> </head> <body> <div id = "app"> <p style = "font-size:25px;">{{ message }}</p> <p style = "font-size:25px;">产品ID:{{ products.id }}</p> <p style = "font-size:25px;">产品数:{{ products.qty }}</p> <button @click = "products.id++;counter++" style = "font-size:25px;">点我</button> </div> <script type = "text/javascript"> var myproduct = {"id":1, name:"book", "price":"20.00"}; var vm = new Vue({ el:'#app', data:{ message:"计数器值的变化", counter:1, products:myproduct } }); Vue.set(myproduct, 'qty', 1); console.log(vm); vm.$watch('counter', function(nval, oval) { this.message= '计数器值的变化 :' + oval + ' 变为 ' + nval + '!'; }); </script> </body> </html>
运行结果