| 提交 | 用户 | age | ||
| 2f6253 | 1 | const toString = Object.prototype.toString; |
| 陈 | 2 | |
| 3 | export function is(val: unknown, type: string) { | |
| 4 | return toString.call(val) === `[object ${type}]`; | |
| 5 | } | |
| 6 | ||
| 7 | export const isDef = <T = unknown>(val?: T): val is T => { | |
| 8 | return typeof val !== 'undefined'; | |
| 9 | }; | |
| 10 | ||
| 11 | export const isUnDef = <T = unknown>(val?: T): val is T => { | |
| 12 | return !isDef(val); | |
| 13 | }; | |
| 14 | ||
| 15 | export const isObject = (val: any): val is Record<any, any> => { | |
| 16 | return val !== null && is(val, 'Object'); | |
| 17 | }; | |
| 18 | ||
| 19 | export function isDate(val: unknown): val is Date { | |
| 20 | return is(val, 'Date'); | |
| 21 | } | |
| 22 | ||
| 23 | export function isNull(val: unknown): val is null { | |
| 24 | return val === null; | |
| 25 | } | |
| 26 | ||
| 27 | export function isNumber(val: unknown): val is number { | |
| 28 | return is(val, 'Number'); | |
| 29 | } | |
| 30 | ||
| 31 | export function isPromise<T = any>(val: unknown): val is Promise<T> { | |
| 32 | return is(val, 'Promise') && isObject(val) && isFunction(val.then) && isFunction(val.catch); | |
| 33 | } | |
| 34 | ||
| 35 | export function isString(val: unknown): val is string { | |
| 36 | return is(val, 'String'); | |
| 37 | } | |
| 38 | ||
| 39 | export const isFunction = (val: unknown): val is Function => typeof val === 'function'; | |
| 40 | ||
| 41 | export function isBoolean(val: unknown): val is boolean { | |
| 42 | return is(val, 'Boolean'); | |
| 43 | } | |
| 44 | ||
| 45 | export function isRegExp(val: unknown): val is RegExp { | |
| 46 | return is(val, 'RegExp'); | |
| 47 | } | |
| 48 | ||
| 49 | export function isArray(val: unknown): val is Array<any> { | |
| 50 | return val && Array.isArray(val); | |
| 51 | } | |
| 52 | ||
| 53 | export const isClient = () => { | |
| 54 | return typeof window !== 'undefined'; | |
| 55 | }; | |
| 56 | ||
| 57 | export const isWindow = (val: any): val is Window => { | |
| 58 | return typeof window !== 'undefined' && is(val, 'Window'); | |
| 59 | }; | |
| 60 | ||
| 61 | export const isElement = (val: unknown): val is Element => { | |
| 62 | return isObject(val) && !!val.tagName; | |
| 63 | }; | |
| 64 | ||
| 65 | export const isServer = typeof window === 'undefined'; | |
| 66 | ||
| 67 | export function isImageDom(o: Element) { | |
| 68 | return o && ['IMAGE', 'IMG'].includes(o.tagName); | |
| 69 | } | |
| f75425 | 70 | |
| V | 71 | export const isTextarea = (element: Element | null): element is HTMLTextAreaElement => { |
| 72 | return element !== null && element.tagName.toLowerCase() === 'textarea'; | |
| 73 | }; | |
