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feat(is): add some type guard #25

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merged 1 commit into from
Nov 29, 2022
Merged

feat(is): add some type guard #25

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4 changes: 4 additions & 0 deletions src/is.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -6,6 +6,10 @@ export const isFunction = <T extends Function> (val: any): val is T => typeof va
export const isNumber = (val: any): val is number => typeof val === 'number'
export const isString = (val: unknown): val is string => typeof val === 'string'
export const isObject = (val: any): val is object => toString(val) === '[object Object]'
export const isUndefined = (val: any): val is undefined => toString(val) === '[object Undefined]'
export const isNull = (val: any): val is null => toString(val) === '[object Null]'
export const isRegExp = (val: any): val is RegExp => toString(val) === '[object RegExp]'
export const isDate = (val: any): val is Date => toString(val) === '[object Date]'

// @ts-ignore
export const isWindow = (val: any): boolean => typeof window !== 'undefined' && toString(val) === '[object Window]'
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