nutui/src/packages/utils/util.ts

// 变量类型判断
export const TypeOfFun = (value: any) => {
  if (null === value) {
    return 'null';
  }

  const type = typeof value;
  if ('undefined' === type || 'string' === type) {
    return type;
  }

  const typeString = toString.call(value);
  switch (typeString) {
    case '[object Array]':
      return 'array';
    case '[object Date]':
      return 'date';
    case '[object Boolean]':
      return 'boolean';
    case '[object Number]':
      return 'number';
    case '[object Function]':
      return 'function';
    case '[object RegExp]':
      return 'regexp';
    case '[object Object]':
      if (undefined !== value.nodeType) {
        if (3 == value.nodeType) {
          return /\S/.test(value.nodeValue) ? 'textnode' : 'whitespace';
        } else {
          return 'element';
        }
      } else {
        return 'object';
      }
    default:
      return 'unknow';
  }
};
//
export const objectToString = Object.prototype.toString;
export const toTypeString = (value: unknown): string => objectToString.call(value);

export const toRawType = (value: unknown): string => {
  // extract "RawType" from strings like "[object RawType]"
  return toTypeString(value).slice(8, -1);
};
export const isArray = Array.isArray;
export const isMap = (val: unknown): val is Map<any, any> => toTypeString(val) === '[object Map]';
export const isSet = (val: unknown): val is Set<any> => toTypeString(val) === '[object Set]';

export const isDate = (val: unknown): val is Date => val instanceof Date;
export const isFunction = (val: unknown): val is Function => typeof val === 'function';
export const isString = (val: unknown): val is string => typeof val === 'string';
export const isSymbol = (val: unknown): val is symbol => typeof val === 'symbol';
export const isObject = (val: unknown): val is Record<any, any> => val !== null && typeof val === 'object';

export const isPromise = <T = any>(val: unknown): val is Promise<T> => {
  return isObject(val) && isFunction(val.then) && isFunction(val.catch);
};

export const getPropByPath = (obj: any, keyPath: string) => {
  try {
    return keyPath.split('.').reduce((prev, curr) => prev[curr], obj);
  } catch (error) {
    return '';
  }
};