VUE中的无限循环代码解析
时间:2020-10-08 13:27:23|栏目:vue|点击: 次
代码如下所示:
<template> <div id=""> <ul v-for="(item,index) in listaaa"> <li v-if='dealFun(item.cdate,index)'>{{item.cdate}}</li> </ul> </div> </template> <script> export default { name: "", data(){ return { listaaa: [{ cdate: '123' }, { cdate: '456' }, ], flagName: '' } }, methods: { dealFun(arg, index) { console.log('---------------------------') if (arg == this.flagName) { return false } else { this.flagName = arg return true } } }, } </script> <style scoped> </style>
导致无限循环的原因:flagName改变导致视图更新,视图更新又导致 dealFun()函数不停执行,进而flagName再次更新;循环往复;
解决办法:(使用全局变量)
<template> <div id=""> <ul v-for="(item,index) in listaaa"> <li v-if='dealFun(item.cdate,index)'>{{item.cdate}}</li> </ul> </div> </template> <script> var flagName; export default { name: "", data(){ return { listaaa: [{ cdate: '123' }, { cdate: '456' }, ], // flagName: '' } }, methods: { dealFun(arg, index) { console.log('---------------------------') if (arg == flagName) { return false } else { flagName = arg return true } } }, } </script> <style scoped> </style>
总结