前端常用的js函数方法

1.邮箱

export const isemail = (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

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.call(e).slice(8,-1)==='regexp'
}

15.是否错误对象

export const iserror = (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promise对象

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

18.是否set对象

export const isset = (e) =>{
return object.prototype.tostring.call(e).slice(8,-1) ==='set'
}
export const us = navigator.useragent.tolowercase();

19.是否是微信浏览器

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

20.是否是移动端

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

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