<!DOCTYPE html> <html lang="en"> <head> <title></title> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1"> <script src="./vue2.js"></script> </head> <body> <div id="app"> <h1 id="myh">{{msg}}</h1> <button @click="change">点击</button> </div> <script> var vm = new Vue({ el: '#app', data: { msg: 'hello' }, methods: { change() { this.msg = 'itcast' // console.log(document.getElementById('myh').innerText); // 如果直接这样打印,打印出来的结果不是我们想要的itcast,而是hello,因为this.msg = ‘itcast’ 它是异步的 // this.$nextTick()的作用是,等你页面上的刷新完之后,我再执行回调函数中的方法 this.$nextTick(() => { console.log(document.getElementById('myh').innerText) }) } } }) </script> </body> </html>
this.$nextTick()
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转载自www.cnblogs.com/javascript9527/p/12303384.html
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