吴裕雄--天生自然 JAVASCRIPT开发学习：DOM EventListener
2024-09-22 02:55:35
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>菜鸟教程(runoob.com)</title>
</head>
<body> <p>该实例使用 addEventListener() 方法在按钮中添加点击事件。 </p>
<button id="myBtn">点我</button>
<p id="demo"></p>
<script>
document.getElementById("myBtn").addEventListener("click", displayDate);
function displayDate() {
document.getElementById("demo").innerHTML = Date();
}
</script> </body>
</html>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>菜鸟教程(runoob.com)</title>
</head>
<body> <p>该实例使用 addEventListener() 方法在按钮中添加点击事件。 </p>
<button id="myBtn">点我</button>
<script>
document.getElementById("myBtn").addEventListener("click", function(){
alert("Hello World!");
});
</script> </body>
</html>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>菜鸟教程(runoob.com)</title>
</head>
<body> <p>该实例使用 addEventListener() 方法向同个按钮中添加两个点击事件。</p>
<button id="myBtn">点我</button>
<script>
var x = document.getElementById("myBtn");
x.addEventListener("click", myFunction);
x.addEventListener("click", someOtherFunction);
function myFunction() {
alert ("Hello World!")
}
function someOtherFunction() {
alert ("函数已执行!")
}
</script> </body>
</html>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>菜鸟教程(runoob.com)</title>
</head>
<body> <p>实例使用 addEventListener() 方法在同一个按钮中添加多个事件。</p>
<button id="myBtn">点我</button>
<p id="demo"></p>
<script>
var x = document.getElementById("myBtn");
x.addEventListener("mouseover", myFunction);
x.addEventListener("click", mySecondFunction);
x.addEventListener("mouseout", myThirdFunction);
function myFunction() {
document.getElementById("demo").innerHTML += "Moused over!<br>"
}
function mySecondFunction() {
document.getElementById("demo").innerHTML += "Clicked!<br>"
}
function myThirdFunction() {
document.getElementById("demo").innerHTML += "Moused out!<br>"
}
</script> </body>
</html>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>菜鸟教程(runoob.com)</title>
</head>
<body> <p>实例在 window 对象中使用 addEventListener() 方法。</p>
<p>尝试重置浏览器的窗口触发 "resize" 事件句柄。</p>
<p id="demo"></p>
<script>
window.addEventListener("resize", function(){
document.getElementById("demo").innerHTML = Math.random();
});
</script> </body>
</html>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>菜鸟教程(runoob.com)</title>
</head>
<body> <p>实例演示了在使用 addEventListener() 方法时如何传递参数。</p>
<p>点击按钮执行计算。</p>
<button id="myBtn">点我</button>
<p id="demo"></p>
<script>
var p1 = 5;
var p2 = 7;
document.getElementById("myBtn").addEventListener("click", function() {
myFunction(p1, p2);
});
function myFunction(a, b) {
var result = a * b;
document.getElementById("demo").innerHTML = result;
}
</script> </body>
</html>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>菜鸟教程(runoob.com)</title>
<style>
div {
background-color: coral;
border: 1px solid;
padding: 50px;
}
</style>
</head>
<body> <p>实例演示了在添加不同事件监听时，冒泡与捕获的不同。</p>
<div id="myDiv">
<p id="myP">点击段落，我是冒泡。</p>
</div><br>
<div id="myDiv2">
<p id="myP2">点击段落，我是捕获。 </p>
</div>
<script>
document.getElementById("myP").addEventListener("click", function() {
alert("你点击了 P 元素!");
}, false);
document.getElementById("myDiv").addEventListener("click", function() {
alert(" 你点击了 DIV 元素 !");
}, false);
document.getElementById("myP2").addEventListener("click", function() {
alert("你点击了 P2 元素!");
}, true);
document.getElementById("myDiv2").addEventListener("click", function() {
alert("你点击了 DIV2 元素 !");
}, true);
</script> </body>
</html>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>菜鸟教程(runoob.com)</title>
</head>
<head>
<style>
#myDIV {
background-color: coral;
border: 1px solid;
padding: 50px;
color: white;
}
</style>
</head>
<body> <div id="myDIV"> div 元素添加了 onmousemove 事件句柄，鼠标在桔红色的框内移动时会显示随机数。
<p>点击按钮移除 DIV 的事件句柄。</p>
<button onclick="removeHandler()" id="myBtn">点我</button>
</div>
<p id="demo"></p>
<script>
document.getElementById("myDIV").addEventListener("mousemove", myFunction);
function myFunction() {
document.getElementById("demo").innerHTML = Math.random();
}
function removeHandler() {
document.getElementById("myDIV").removeEventListener("mousemove", myFunction);
}
</script> </body>
</html>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>菜鸟教程(runoob.com)</title>
</head>
<body> <p> Internet Explorer 8 及更早IE版本不支持 addEventListener() 方法。</p>
<p>该实例演示了所有浏览器兼容的解决方法。</p>
<button id="myBtn">点我</button>
<script>
var x = document.getElementById("myBtn");
if (x.addEventListener) {
x.addEventListener("click", myFunction);
} else if (x.attachEvent) {
x.attachEvent("onclick", myFunction);
}
function myFunction() {
alert("Hello World!");
}
</script> </body>
</html>
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