lovecoding
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VIP20


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    #div1{
      width: 200px;
      height: 200px;
      background: aqua
    }
  </style>
</head>
<body>
  <div id="div1"></div>
  <script>
    var div1 = document.getElementById('div1')
    //1.当前对象引用中  谁的事件 this就指向谁
    // div1.onclick = function(){
    //   console.log(this)
    // } 
    
    //2.在定时器中 this->window
    // var timer = setInterval(function(){
    //   console.log(this)
    // },1000)
    // div1.onclick = function(){
    //   var timer = setInterval(function(){
    //     console.log(this)
    //   },1000)
    // }
    
    //3.对象下面 this->对象本身
    // var person = {
    //   name: 'zs',
    //   age: 18,
    //   eat: function(){
    //     console.log(this)
    //   }
    // }
    // person.eat()

    //4.方法里面  this->window
    function xx(){
      console.log(this)
    }
    xx()
  </script>
</body>
</html>