はてなブックマーク

console.log('string: ', typeof 'a', Object.prototype.toString.call('a')) console.log('String: ', typeof new String(""), Object.prototype.toString.call(new String(""))) console.log('number: ', typeof 0, Object.prototype.toString.call(0)) console.log('Number: ', typeof new Number(0), Object.prototype.toString.call(new Number(0))) console.log('boolean: ', typeof true, Object.prototype.toString.call(t