console 命令行工具 X clear

console

const witchEvent = (function () {
    if (window.addEventListener) {
        return function (element, type, callback, useCapture) {
            element.addEventListener(type, function (e) {
                callback.call(element, e)
            }, useCapture)
        }
    } else if (window.attachEvent) {
        return function (element, type, callback) {
            element.attachEvent('on' + type, function (e) {
                callback.call(element, e)
            })
        }
    }
})()

witchEvent()

<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<meta name="viewport" content="width=, initial-scale=">
	<meta http-equiv="X-UA-Compatible" content="">
	<title>函数柯理化</title>
</head>
<body>
	
</body>
</html>