119 lines
2.4 KiB
JavaScript
119 lines
2.4 KiB
JavaScript
const toString = Object.prototype.toString
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export function is(val, type) {
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return toString.call(val) === `[object ${type}]`
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}
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export function isDef(val) {
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return typeof val !== 'undefined'
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}
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export function isUndef(val) {
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return typeof val === 'undefined'
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}
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export function isNull(val) {
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return val === null
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}
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export function isWhitespace(val) {
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return val === ''
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}
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export function isObject(val) {
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return !isNull(val) && is(val, 'Object')
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}
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export function isArray(val) {
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return val && Array.isArray(val)
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}
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export function isString(val) {
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return is(val, 'String')
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}
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export function isNumber(val) {
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return is(val, 'Number')
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}
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export function isBoolean(val) {
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return is(val, 'Boolean')
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}
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export function isDate(val) {
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return is(val, 'Date')
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}
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export function isRegExp(val) {
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return is(val, 'RegExp')
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}
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export function isFunction(val) {
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return typeof val === 'function'
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}
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export function isPromise(val) {
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return is(val, 'Promise') && isObject(val) && isFunction(val.then) && isFunction(val.catch)
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}
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export function isElement(val) {
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return isObject(val) && !!val.tagName
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}
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export function isWindow(val) {
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return typeof window !== 'undefined' && isDef(window) && is(val, 'Window')
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}
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export function isNullOrUndef(val) {
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return isNull(val) || isUndef(val)
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}
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export function isNullOrWhitespace(val) {
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return isNullOrUndef(val) || isWhitespace(val)
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}
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export function isEmpty(val) {
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if (isArray(val) || isString(val)) {
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return val.length === 0
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}
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if (val instanceof Map || val instanceof Set) {
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return val.size === 0
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}
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if (isObject(val)) {
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return Object.keys(val).length === 0
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}
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return false
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}
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/**
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* * 类似mysql的IFNULL函数
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* * 第一个参数为null/undefined/'' 则返回第二个参数作为备用值，否则返回第一个参数
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* @param {Number|Boolean|String} val
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* @param {Number|Boolean|String} def
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* @returns
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*/
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export function ifNull(val, def = '') {
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return isNullOrWhitespace(val) ? def : val
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}
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export function isUrl(path) {
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const reg =
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/(((^https?:(?:\/\/)?)(?:[-;:&=\+\$,\w]+@)?[A-Za-z0-9.-]+(?::\d+)?|(?:www.|[-;:&=\+\$,\w]+@)[A-Za-z0-9.-]+)((?:\/[\+~%\/.\w-_]*)?\??(?:[-\+=&;%@.\w_]*)#?(?:[\w]*))?)$/
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return reg.test(path)
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}
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/**
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* @param {string} path
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* @returns {Boolean}
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*/
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export function isExternal(path) {
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return /^(https?:|mailto:|tel:)/.test(path)
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}
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export const isServer = typeof window === 'undefined'
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export const isClient = !isServer
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