设计一个 LazyMan 类

要求设计 LazyMan 类，实现以下功能

 
LazyMan('Tony');
// Hi I am Tony
 
LazyMan('Tony').sleep(10).eat('lunch');
// Hi I am Tony
// 等待了10秒...
// I am eating lunch
 
LazyMan('Tony').eat('lunch').sleep(10).eat('dinner');
// Hi I am Tony
// I am eating lunch
// 等待了10秒...
// I am eating diner
 
LazyMan('Tony').eat('lunch').eat('dinner').sleepFirst(5).sleep(10).eat('junk food');
// Hi I am Tony
// 等待了5秒...
// I am eating lunch
// I am eating dinner
// 等待了10秒...
// I am eating junk food

代码

      class LazyMans {
        constructor(name) {
          this.name = name;
          this.queen = [];
          setTimeout(() => {
            this._next();
          }, 0);
        }
        sleep(wait, isFiset = false) {
          const _sleep = () => {
            setTimeout(() => {
              console.log(`等待了${wait}秒`);
              this._next();
            }, wait * 1000);
          };
          isFiset ? this.queen.unshift(_sleep) : this.queen.push(_sleep);
          return this;
        }
        _next() {
          if (!this.queen.length) return;
          let shift = this.queen.shift();
          shift.call(this);
        }
        eat(food) {
          const _eat = () => {
            console.log(`I am eating ${food}`);
            this._next();
          };
          this.queen.push(_eat);
          return this;
        }
        sleepFirst(wait) {
          return this.sleep(wait, true);
        }
      }
      function LazyMan(name) {
        return new LazyMans(name);
      }