JavaScript封装检测数据类型功能ObjectprototypetoStringcall

Posted 2022-05-20 web半晨

function isType(type) 
    return function (obj) 
        return Object.prototype.toString.call(obj) === `[object $type]`;
    


let isString = isType('String'),
    isNumber = isType('String'),
    isObject = isType('Object');

console.log(isString(1));
// false
console.log(isString('7'));
// true
console.log(isNumber(3));
// false
console.log(isObject( id: 1 ));
// true