/**
* * 判断文件 *
* * 如果你需要类型判断，请不要再使用 Object.prototype.toString.call()方法
* * 直接调用我们下方封装好的is函数即可 * 我想，以下函数，已经可以满足所有情况下的类型判断 */
export const toString = Object.prototype.toString;
export const is = (val, type) => toString.call(val) === `[object ${type}]`;
//判断非undefined
export const isDef = (val) => typeof val !== 'undefined';
//判断是undefined
export const isUnDef = (val) => !isDef(val);
//判断是否是对象
export const isObject = (val) => val !== null && toString.call(val) === `[object Object]`;
export const isEmpty = (val) => {
if (isArray(val) || isString(val)) return val.length === 0;
if (val instanceof Map || val instanceof Set) return val.size === 0;
if (isObject(val)) return Object.keys(val).length === 0; return;
}
//判断是否是时间类型
export const isDate = (val) => is(val, "Date");
//判断是否是null类型
export const isNull = (val) => val === null;
//判断不可访问类型
export const isNullAndUnDef = (val) => isUnDef(val) && isNull(val);
//判断undefined和null其中一个
export const isNullOrUnDef = (val) => isUnDef(val) || isNull(val);
//判断是否是数字类型
export const isNumber = (val) => is(val, "Number");
//判断是否是Promise类型
export const isPromise = (val) => { return (is(val, "Promise")) }
//判断是否是字符类型
export const isString = (val) => is(val, "String");
//判断是否为函数
export const isFunction = (val) => typeof val === "function";
//判断是否为booean类型
export const isBoolean = (val) => is(val, "Boolean");
//判断是否是正则表达式
export const isRegExp = (val) => is(val, "RegExp");
//判断是否是数组
export const isArray = (val) => val && Array.isArray(val);
//判断是否是window对象
export const isWindow = (val) => typeof window !== "undefined" && is(val, "Window");
export default {is,isDef,isUnDef,isObject,isEmpty,isDate,isNull,isNullAndUnDef,isNullOrUnDef,isNumber,isPromise,isString,isRegExp,isFunction,isBoolean,isArray,isWindow}