封装一个obj对象，怎么处理，求教

Question

例:obj.write("1").await(1000).write("2");//打印1//等待await时长之后打印2###题目描述

Answer 1

classObj{constructor(){this.sleep=0}write(str){if(this.sleep){setTimeout(()=>{console.log(str)},this.sleep)}else{console.log(str)}returnthis}await(time){this.sleep+=timereturnthis}}constobj=newObj()obj.write('1').await(1000).write('2').await(3000).write(3)