类型判断

Posted 2020-06-18 BY73

function isType(type){
    return function(o){
        return Object.prototype.toString.call(o) === ‘[object ‘ + type + ‘]‘;
    }
}

var isString = isType("String");
var isObject = isType("Object");
var isArray = isType("Array");
 
isString("I‘m b.");
isArray([1,2,3])；
isObject({});