父组件通过props传值给子组件,如何避免子组件改变props的属性值报错问题
报错Avoid mutating a prop directly since the value will be overwritten whenever the parent component re-renders. Instead, use a data or computed property based on the prop’s v…
这篇文章为转载,我的需求是从题库中,随机抽几道题,作为新试卷。代码如下:
var items [1,2,4,5,6,7,8,9,10];1.从数组items中随机取出一个元素
var item items[Math.floor(Math.random()*items.length)];2.从前面的一篇随机数组…
结构
vue操作一个很有意思的报错
[Vue warn]: You may have an infinite update loop in a component render function. 代码:
<template><span class"show-filters" :class"show !show">{{ show ? 隐藏过滤器 ↑ …
隐式创建
var arr["Audi","BMW","Volvo"];
直接实例化
var arrnew Array("Audi","BMW","Volvo");
创建数组并给数组元素赋值
var arrnew Array();
arr[0]"Audi";
arr[1]"BMW";
arr[2]&q…