Digoler

```javascript function red() { console.log('red') } function green() { console.log('green') } function yellow() { console.log('yellow') } // 要求：红灯3秒亮一次，黄灯2秒亮一次，绿灯1秒亮一次。 const light = function(timer, cb) { return new Promise(resolve => { setTimeout(()...

```  const myInstanceof = (left, right) => {      let proto = Object.getPrototypeOf(left)      while (true) {          if (proto === null) return false          if (proto === right.prototype) return true          proto = Object.getPrototypeOf(proto)        ...