on：綁定事件
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>溫故而知"心"</title>
<style>
.demo {
width: 100px;
height: 100px;
background-color: #ff0000;
}
.demo1 {
width: 100px;
height: 100px;
background-color: #ff00ff;
}
</style>
</head>
<body>
<div class="demo"></div>
<div class="demo1"></div>
<ul>
<li>1</li>
<li>2</li>
<li>3</li>
</ul>
<ul>
<li>4</li>
<li>5</li>
<li>6</li>
</ul>
</body>
<script src="https://cdn.bootcss.com/jquery/1.12.4/jquery.min.js"></script>
<script>
$('.demo').on('click', function () {
alert("xyz")
})
$('.demo1').on('mouseenter', function () {
alert("lm")
})
$('ul').eq(0).on('click', function () {
alert('xyzul')
})
$('ul').eq(1).on('click', 'li', () => {
alert('xyzli')
})
</script>
</html>
on通過對象的方式控制多個函數
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>溫故而知"心"</title>
</head>
<body>
<div>xyz</div>
</body>
<script src="https://cdn.bootcss.com/jquery/1.12.4/jquery.min.js"></script>
<script>
$('div').on({
click: function () {
console.log('click')
},
mouseenter: function () {
console.log('mouseeenter')
},
mouseleave: function () {
console.log('mouseleave')
}
})
</script>
</html>
one
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>溫故而知"心"</title>
</head>
<body>
<a href="https://www.baidu.com">只跳轉一次淘寶頁面，後面一直跳轉百度頁面</a>
</body>
<script src="https://cdn.bootcss.com/jquery/1.12.4/jquery.min.js"></script>
<script>
$('a').one('click', function () {
window.open('https://taobao.com');
return false;
})
</script>
</html>
off:解綁事件
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>溫故而知"心"</title>
<style>
.demo {
width: 100px;
height: 100px;
background-color: #ff0000;
}
</style>
</head>
<body>
<div class="demo"></div>
</body>
<script src="https://cdn.bootcss.com/jquery/1.12.4/jquery.min.js"></script>
<script>
function clickOne() {
console.log("clickOne")
}
function clickTwo() {
console.log("clickTwo")
}
$('.demo').on('click', clickOne)
$('.demo').on('click', clickTwo)
function enterOne() {
console.log("enterOne")
}
function enterTwo() {
console.log("enterTwo")
}
$('.demo').on('mouseenter', enterOne)
$('.demo').on('mouseenter', enterTwo)
$('.demo').off('click', clickOne)
</script>
</html>
trigger
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>溫故而知"心"</title>
<style>
.demo {
width: 100px;
height: 100px;
background-color: #ff0000;
}
</style>
</head>
<body>
<div class="demo"></div>
</body>
<script src="https://cdn.bootcss.com/jquery/1.12.4/jquery.min.js"></script>
<script>
$('.demo').on('click', function (e, a, b, c, d) {
console.log('click', a, b, c, d)
})
$('.demo').trigger('click', [11, 22, 4, 7])
$('.demo').on('pageLoad', function (e, a, b, c, d) {
console.log('click', a, b, c, d)
})
$('.demo').trigger('pageLoad', [77, 21, 123, 456])
</script>
</html>
hover方法：可以觸發鼠標移入移出的效果
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>溫故而知"心"</title>
<style>
.demo {
width: 100px;
height: 100px;
background-color: #ff0000;
}
.demo1 {
width: 100px;
height: 100px;
background-color: #0000ff;
}
</style>
</head>
<body>
<div class="demo"></div>
<div class="demo1"></div>
</body>
<script src="https://cdn.bootcss.com/jquery/1.12.4/jquery.min.js"></script>
<script>
$('.demo').on('mouseenter', () => {
console.log('enter')
}).on('mouseleave', () => {
console.log('leave')
})
$('.demo1').hover(() => {
console.log('enter1')
}, () => {
console.log('leave1')
})
</script>
</html>
keydown:鍵盤按下事件
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>溫故而知"心"</title>
</head>
<body>
<input type="text" class="demo" />
</body>
<script src="https://cdn.bootcss.com/jquery/1.12.4/jquery.min.js"></script>
<script>
$('.demo').keydown(function () {
console.log($(this).val())
})
</script>
</html>
