const toString = Object.prototype.toString;
|
|
export function is(val: unknown, type: string) {
|
return toString.call(val) === `[object ${type}]`;
|
}
|
|
export const isDef = <T = unknown>(val?: T): val is T => {
|
return typeof val !== 'undefined';
|
};
|
|
export const isUnDef = <T = unknown>(val?: T): val is T => {
|
return !isDef(val);
|
};
|
|
export const isObject = (val: any): val is Record<any, any> => {
|
return val !== null && is(val, 'Object');
|
};
|
|
export function isDate(val: unknown): val is Date {
|
return is(val, 'Date');
|
}
|
|
export function isNull(val: unknown): val is null {
|
return val === null;
|
}
|
|
export function isNumber(val: unknown): val is number {
|
return is(val, 'Number');
|
}
|
|
export function isPromise<T = any>(val: unknown): val is Promise<T> {
|
return is(val, 'Promise') && isObject(val) && isFunction(val.then) && isFunction(val.catch);
|
}
|
|
export function isString(val: unknown): val is string {
|
return is(val, 'String');
|
}
|
|
export const isFunction = (val: unknown): val is Function => typeof val === 'function';
|
|
export function isBoolean(val: unknown): val is boolean {
|
return is(val, 'Boolean');
|
}
|
|
export function isRegExp(val: unknown): val is RegExp {
|
return is(val, 'RegExp');
|
}
|
|
export function isArray(val: unknown): val is Array<any> {
|
return val && Array.isArray(val);
|
}
|
|
export const isClient = () => {
|
return typeof window !== 'undefined';
|
};
|
|
export const isWindow = (val: any): val is Window => {
|
return typeof window !== 'undefined' && is(val, 'Window');
|
};
|
|
export const isElement = (val: unknown): val is Element => {
|
return isObject(val) && !!val.tagName;
|
};
|
|
export const isServer = typeof window === 'undefined';
|
|
export function isImageDom(o: Element) {
|
return o && ['IMAGE', 'IMG'].includes(o.tagName);
|
}
|
|
export const isTextarea = (element: Element | null): element is HTMLTextAreaElement => {
|
return element !== null && element.tagName.toLowerCase() === 'textarea';
|
};
|
