44 lines
1.1 KiB
TypeScript
44 lines
1.1 KiB
TypeScript
export function is(val: unknown, type: string) {
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return toString.call(val) === `[object ${type}]`
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}
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export const isWindow = (val: any): val is Window => {
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return typeof window !== 'undefined' && is(val, 'Window')
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}
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export function isString(val: unknown): val is string {
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return is(val, 'String')
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}
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export const isDef = <T = unknown>(val?: T): val is T => {
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return typeof val !== 'undefined'
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}
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export const isUnDef = <T = unknown>(val?: T): val is T => {
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return !isDef(val)
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}
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export const isFunction = (val: unknown): val is Function => typeof val === 'function'
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export const isServer = typeof window === 'undefined'
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export function isNumber(val: unknown): val is number {
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return is(val, 'Number')
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}
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export const isFirefox = function() {
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return !!window.navigator.userAgent.match(/firefox/i)
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}
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export const isClient = () => {
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return typeof window !== 'undefined'
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}
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export const isObject = (val: any): val is Record<any, any> => {
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return val !== null && is(val, 'Object')
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}
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export const isElement = (val: unknown): val is Element => {
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return isObject(val) && !!val.tagName
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}
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