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const toString = Object.prototype.toString; |
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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 function 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 function isUnDef<T = unknown>(val?: T): val is T { |
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return !isDef(val); |
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} |
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export function 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 function isEmpty<T = unknown>(val: T): val is T { |
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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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export function isDate(val: unknown): val is Date { |
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return is(val, 'Date'); |
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} |
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export function isNull(val: unknown): val is null { |
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return val === null; |
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} |
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export function isNullAndUnDef(val: unknown): val is null | undefined { |
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return isUnDef(val) && isNull(val); |
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} |
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export function isNullOrUnDef(val: unknown): val is null | undefined { |
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return isUnDef(val) || isNull(val); |
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} |
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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 function isPromise<T = any>(val: unknown): val is Promise<T> { |
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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 isString(val: unknown): val is string { |
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return is(val, 'String'); |
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} |
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export function isFunction(val: unknown): val is Function { |
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return typeof val === 'function'; |
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} |
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export function isBoolean(val: unknown): val is boolean { |
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return is(val, 'Boolean'); |
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} |
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export function isRegExp(val: unknown): val is RegExp { |
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return is(val, 'RegExp'); |
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} |
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export function isArray(val: any): val is Array<any> { |
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return val && Array.isArray(val); |
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} |
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export function 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 isElement(val: unknown): val is Element { |
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return isObject(val) && !!val.tagName; |
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} |
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export function isMap(val: unknown): val is Map<any, any> { |
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return is(val, 'Map'); |
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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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export function isUrl(path: string): boolean { |
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const reg = /^http(s)?:\/\/([\w-]+\.)+[\w-]+(\/[\w- ./?%&=]*)?/; |
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return reg.test(path); |
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} |