每天一篇js --类型判断

    function isType(type){
        return function(content){
            let t = Object.prototype.toString.call(content).replace(/\[Object\s|\]/g,'');
            return t = type;
        }
    }
    let arr = ['String','Number','Array','Object','NULL'];
    let utils = {}
    arr.forEach(item=>{
        utils['is' +item] = isType(item)
    })
    
    console.log(utils.isString('123'));