一些方法、技巧

1.清除字符串中的空格

replace(/\s/g, '')

let str = '123 2  2332'.replace(/\s/g, '')  //12322332

2、Object.assign() 合并对象

const obj1 = { name: '张三',age: 20}
const obj2 = { address: '广东深圳', hobby: 'code' }
const obj3 = { workingYears: 5}
 
const obj = Object.assign(obj1, obj2, obj3)
 
console.log(obj) //{ name: '张三', age: 20, address: '广东深圳', hobby: 'code', workingYears: 5}

3.使用css画一个X

<span class="close-x"></span> 
<style> 
    .close-x {
        display: inline-block;
        width: 20px;
        height: 20px;
        border: 7px solid #f56b00;
        background:
        linear-gradient(45deg, rgba(0,0,0,0) 0%,rgba(0,0,0,0) 43%,#fff 45%,#fff 55%,rgba(0,0,0,0) 57%,rgba(0,0,0,0) 100%),
        linear-gradient(135deg, #f56b00 0%,#f56b00 43%,#fff 45%,#fff 55%,#f56b00 57%,#f56b00 100%);
    }
</style>

4.vue遮罩,禁止下方滑动

1.blog.csdn.net/weixin_3618… 2.blog.51cto.com/u_15283585/…

5.一行代码

从url获取参数并转为对象

const getParameters = URL => JSON.parse(`{"${decodeURI(URL.split("?")[1]).replace(/"/g, '\\"').replace(/&/g, '","').replace(/=/g, '":"')}"}`)

getParameters("https://www.google.com.hk/search?q=js+md&newwindow=1");
// {q: 'js+md', newwindow: '1'}

检查对象是否为空

const isEmpty = obj => Reflect.ownKeys(obj).length === 0 && obj.constructor === Object;
isEmpty({}) // true
isEmpty({a:"not empty"}) //false