lovecoding
/
VIP32


			
				
					
						
						
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							<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        #box {
            width: 200px;
            height: 200px;
            background: #f00;
        }
    </style>
</head>
<body>
    <div id="box"></div>
    <script>
        var box = document.getElementById("box");
        //1. 点击事件 this指向点击的对象
        box.onclick = function() {
            console.log(this); //box
        }
        // 2.倒计时 this指向window
        box.onclick = function() {
            setInterval(function() {
                console.log(this); // 
            },1000)
        }
        // 3.对象中的this 指向当前对象
        var obj = {
            name:"Lucy",
            age: 18,
            address:function() {
                console.log(this);
            }
        }
        obj.address()
        //4.函数中的this 指向window
        function fn1() {
            console.log(this);
        }
        fn1();
    </script>
</body>
</html>