1. return false ES6函数的扩展：箭头函数 数组 arr.map() arr.filter()
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<script>
var o = {
num (a) {
if(a>4){
a=1;
return false; // return false 表示 不执行了。
}
a=10;
return a;
}
}
console.log(o.num(21)); // false
var arr = [1,2,3];
console.log(arr.map(x => x * x)); // 相当于for循环
console.log(arr.filter(x => x > 1)); // 过滤条件 把x>1的过滤出来 【2，3】 //函数的扩展，箭头函数
var f = x=>x*12;
console.log(f(2));
var f2 = ()=>10;
console.log(f2());
var f3 = (a,b)=>a+b;
console.log(f3(4, 5)); </script> </body>
</html>
2. Test.vue TestOne.vue 路由传值等
Test.vue
<template>
{{mes}}
<button @click="test">btn</button>
<group>
<x-input
title='名字'
placeholder='请输入你的名字'
:value.sync="name">
</x-input>
<x-input
title='爱好'
placeholder='请输入你的爱好'
:value.sync="hobby">
</x-input>
<x-button type="primary" @click="goToTestOne">立即申请</x-button>
</group>
<div>
<img :src="arrowSrc" alt="">
<p :class="{'red-font':isRed}">红色字体</p>
</div>
</template>
<style>
.red-font{color:red;}
</style> <script>
export default{
components: {
Group: require('vux-components/group'),
XInput: require('vux-components/x-input'),
XButton: require('vux-components/x-button') },
data () {
return {
name: '',
hobby: '',
mes: '123234',
arrowSrc: require('../assets/images/helper/help-arrow-down.png'),
isRed: true
}
},
methods: {
test () {
// this.$data.mes = '456'
this.$set('mes', '中国') // 两种写法
},
goToTestOne () {
// this.$router.go('/testOne')
this.$router.go({path: '/testOne', query: {name: this.$data.name, hobby: this.$data.hobby}})
}
}
}
</script>
Test.vue
TestOne.vue
<template>
{{mes}}
<p>{{name}}</p>
<p>{{hobby}}</p>
</template> <script>
export default{
data () {
return {
name: '',
hobby: '',
mes: '123234'
}
},
created () { // 用 create ()
this.$data.name = this.$route.query.name // 注意这里是 $route 没有'r'
this.$data.hobby = this.$route.query.hobby
}
}
</script>
TestOne.vue
3. 判断 变量 a 是否未定义 undefined
<script>
if (typeof(a) !== 'undefined') {
console.log(a);
} else {
console.log(111);
}
</script>
// good
if (typeof person === 'undefined') {
...
}
4.限制 Input 只能输入 a-zA-Z0-9 - /\ 汉字等
@keyup="validInput()"
validInput () {
this.$data.address = this.$data.address.replace(/[^A-Za-z0-9\u4e00-\u9fa5\\_\/\.\-()·]/, '')
}