前端常用的js函数方法

1.邮箱

export const imail = (e) => {return /^([a-za-z0-9_-])+@([a-za-z0-9_-])+((.[a-za-z0-9_-]{2,3}){1,2})$/.test(e)}

2.手机号码

export const ismobile = (e) => {return /^1[0-9]{10}$/.test(e)}

3.电话号码

export const isphone = (e) =>{return /^([0-9]{3,4}-)?[0-9]{7,8}$/.test(e)}

4.是否url地址

export const isurl = (e) => {return /^http[s]?:\/\/.*/.test(e)}

5.是否字符串

export const isnumber = (e) =>{return object.prototype.tostring.call(e).slice(8,-1) === 'string'}

6.是否洁莱康数字

export const isnumber = (e) =>{return object.prototype.tostring.call(e).slice(8,-1) ==='number'}

7.是否boolean

export const isboolean = (e) =>{return object.prototype.tostring.call(e).slice(8,-1) ==='boolean'}

8.是否函数

export const isfunction = (e) =>{return object.prototype.tostring.call(e).slice(8,-1) === 'function'}

9.是否为null

河北简称什么export const isnull = (e) =>{return object.prototype.tostring.call(e).slice(8,-1)==='null'}

10.是否undefined

export const isundefined = (e) =>{return object.prototype.tostring.call(e).slice(8,-1)==='undefined'} 

11.是否对象

export const isobject = (e) =>{return object.prototype.tostring.call(e).slice(8,-1) === 'object'}

12.是否数组

export const isarray = (e) =>{return object.prototype.tostring.call(e).slice(8,-1)==='array'} 

13.是否时间

export const isdate = (e) =>{return object.prototype.tostring.call(e).slice(8,-1)==='date'} 

14.是否正则

export const isregexp = (e) =>{return object.prototype.tostring.师范类二本院校call(e).slice(8,-1)==='regexp'}

15.是否错误对象

export const irror = (e) =>{return object.prototype.tostring.call(e).slice(8,-1)==='error'}

16.是否symbol函数

export const issymbol = (e) =>{return object.prototype.tostring.call(e).slice(8,-1)==='symbol'}

17.是否promi对象

export const ispromi = (e) =>{return object.入党申请书多少字prototype.tostring.call(e).slice(8,-1)==='promi'}

18.是否t对象

export const ist = (e) =>{return object.prototype.tostring.call(e).slice专转本报名时间(8,-1) ==='t'}export const us = navigator.uragent.tolowerca();

19.是否是微信浏览器

export const isweixin = () =>{return ua.match(/micromesnger/i) == 'micromesnger'}

20.是否是移动端

export const isdevicemobile =()=>{return /android|webos|iphone|ipod|balckberry/i.test(ua)}

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