if (escape(str).indexOf("%u") > 0) {
//字符串 str 中含有汉字
}
Array.isArray()
let isArray =(val)=> !!val && Array.isArray(val);
let isBoolean =(val)=> typeof val === 'boolean';
let isNumber =(str)=> typeof str === 'number';
let isString =(str)=> typeof str === 'string';
let isSymbol =(str)=> typeof str === 'symbol';
let isFunction =(str)=> typeof str === 'function';