computed to calculate property
<!DOCTYPE html><html lang="en"><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"> <title>计算属性</title></head><body> <h1>计算属性</h1> <br> <div id="app"> {{newPrice}} </div> <script src="../js/vue.js"></script> <script type="text/javascript"> var app = new Vue({ el: "#app", data: { price: 100, }, computed: { newPrice() { return this.price = '￥' + this.price + '元' } }, }) </script></body></html>复制代码Calculating attribute
1 is a function, the function name to call directly in page
2 must return a value return
. 3 can be calculated simultaneously a plurality of attributes
watch listen properties
in
watch （）{}复制代码Data in the data name as the function name, and the return value is needed, each attribute may only listen to one
Two different
Computing a plurality of data values may be calculated at the same time, a listener can listen only data value
Reproduced in: https: //juejin.im/post/5d070429e51d457756536792