03JavaScript程序设计修炼之道_2019-07-02_21-47-36_ 鼠标弹起拖拽、放大镜、mouseenter&mouseleave、
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互联网集市收集整理的这篇技术教程文章主要介绍了03JavaScript程序设计修炼之道_2019-07-02_21-47-36_ 鼠标弹起拖拽、放大镜、mouseenter&mouseleave、，小编现在分享给大家，供广大互联网技能从业者学习和参考。文章包含6057字，纯文字阅读大概需要9分钟。
内容图文
26drag.html
<!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>Document</title>
<style>
* {
padding: 0;
margin: 0;
}
.box {
width: 100px;
height: 100px;
border: 20px solid gray;
border-top-width: 30px;
padding: 12px;
background-color: blue;
cursor: move;
position: absolute;
}
</style>
</head>
<body>
<div class="box" id="box"></div>
<script>
var box = document.querySelector("#box");
box.onmousedown = function(e) {
var e = e || event;
// 记住点击div的内部偏移量
var disx = e.offsetX || e.layerX;
var disy = e.offsetY || e.layerY;
document.onmousemove = function(e) {
var e = e || event;
box.style.left = e.pageX - disx + "px";
box.style.top = e.pageY - disy + "px";
}
// 鼠标弹起 取消拖拽
document.onmouseup = function() {
document.onmousemove = null;
}
}
</script>
</body>
</html>
27magnifier.html
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
</head>
<style type="text/css">
*{
margin: 0;
padding: 0;
}
#box{
width: 350px;
height: 350px;
border: 1px solid #000;
margin: 200px;
position: relative;
}
#big{
width: 400px;
height: 400px;
border: 1px solid #000;
overflow: hidden;
position: absolute;
top:0;
left : 360px;
display: none;
}
#mask{
width: 175px;
height: 175px;
background: paleturquoise;
position: absolute;
left:0;
top: 0;
opacity: 0.3;
display: none;
cursor: move;
}
#small{
position: relative;
}
#bigImg{
position: absolute;
left: 0;
top: 0;
}
</style>
<body>
<div id="box" >
<div id="small"><!--小图区-->
<img src="img/001.jpg" alt="" />
<div id="mask"></div><!--遮罩层-->
</div>
<div id="big"><!--大图区-->
<img src="img/0001.jpg" width="600" height="600" alt="" id="bigImg"/>
</div>
</div>
</body>
<script src="./tool.js"></script>
<script>
var box = $("box");
var small = $("small");
var mask = $("mask");
var big = $("big");
var bigImg = $("bigImg");
// 鼠标放入small区域 遮罩层与big显示
$("small").onmouseenter = function() {
$("mask").style.display = "block";
$("big").style.display = "block";
}
// 鼠标离开small区域 遮罩层与big隐藏
$("small").onmouseleave = function() {
$("mask").style.display = "none";
$("big").style.display = "none";
}
// 鼠标在小图区移动
$("small").onmousemove = function(e) {
var e = e || event;
var x = e.pageX - mask.offsetWidth/2 - box.offsetLeft;
var y = e.pageY - mask.offsetHeight/2 - box.offsetTop;
// 水平范围 0～box.offsetWidth - mask.offsetWidth
// 竖直范围 0～box.offsetHeight - mask.offsetHeight
var maxL = box.offsetWidth - mask.offsetWidth;
var maxT = box.offsetHeight - mask.offsetHeight
x = x<0?0:(x>maxL?maxL:x);
y = y<0?0:(y>maxT?maxT:y);
// 设置遮罩层坐标
mask.style.left = x + "px";
mask.style.top = y + "px";
// 对大图进行操作
// 小图区:大图区 = x:大图片移动的距离
var bigImgLeft = -x*big.offsetWidth/small.offsetWidth;
var bigImgTop = -y*big.offsetHeight/small.offsetHeight;
bigImg.style.left = bigImgLeft + "px";
bigImg.style.top = bigImgTop + "px";
}
</script>
</html>
28mouseenter&mouseleave.html
<!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>Document</title>
<style>
#box1 {
width: 300px;
height: 300px;
background-color: red;
}
#box2 {
width: 150px;
height: 150px;
background-color: green;
}
</style>
</head>
<body>
<div id="box1">
<div id="box2"></div>
</div>
<script>
var box1 = document.querySelector("#box1");
var num = 0;
// 触发子元素的mouseover 会冒泡到父亲上
/*box1.onmouseover = function() {
num++;
console.log(num);
}
*/
// 触发子元素的mouseover 不会冒泡到父亲上
box1.onmouseenter = function() {
num++;
console.log(num);
}
</script>
</body>
</html>
29popup.html
<!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>Document</title>
<style>
* {
padding: 0;
margin: 0
}
a {
text-decoration: none;
color: #000;
}
.login-header {
text-align: center;
height: 30px;
line-height: 30px;
font-size: 24px;
}
.login {
width: 512px;
height: 280px;
position: absolute;
left: 50%;
top: 50%;
margin-left: -256px;
margin-top: -140px;
background-color: #fff;
z-index: 9999;
border: 1px solid #ebebeb;
box-shadow: 0px 0px 20px #ddd;
display: none;
}
.login-title {
width: 100%;
text-align: center;
height: 40px;
line-height: 40px;
font-size: 18px;
cursor: move;
margin: 10px 0 0 0;
position: relative;
}
.login-title span {
position: absolute;
right: -20px;
top: -30px;
background-color: #fff;
width: 40px;
height: 40px;
border-radius: 50%;
}
.mask {
width: 100%;
height: 100%;
position: fixed;
left: 0px;
top: 0px;
background-color: #000;
opacity: 0.3;
-moz-opacity: 0.3;
filter: alpha(opacity=30);
display: none;
}
</style>
</head>
<body>
<div class="login-header"><a id="login_btn" href="javascript:void(0);">登陆</a></div>
<div class="login" id="login">
<div class="login-title" id="loginTitle">
登陆会员
<span><a id="closeBtn" class="close-btn" href="javascript:void(0);">关闭</a></span>
</div>
<div class="login-content">
<div class="login-input">
<label for="">用户名:</label>
<input type="text" name="" id="">
</div>
<div class="login-input">
<label for="">密码:</label>
<input type="password" name="" id="">
</div>
</div>
<div class="login-button">
<a id="loginBtn" href="javascript:void(0);">登陆</a>
</div>
</div>
<div class="mask" id="mask"></div>
<script src="./tool.js"></script>
<script>
var login_btn = document.getElementById("login_btn");
// 显示登陆框与遮罩层
login_btn.onclick = function () {
$("mask").style.display = "block";
$("login").style.display = "block";
return false;
}
// 点击关闭 关闭登陆框与遮罩层
$("closeBtn").onclick = function () {
$("mask").style.display = "none";
$("login").style.display = "none";
}
// 拖拽
$("loginTitle").onmousedown = function(e) {
var e = e || event;
var disx = e.pageX - $("login").offsetLeft;
var disy = e.pageY - $("login").offsetTop;
document.onmousemove = function(e) {
var loginX = e.pageX - disx;
var loginY = e.pageY - disy;
$("login").style.left = loginX + $("login").offsetWidth/2 + "px";
$("login").style.top = loginY + $("login").offsetHeight/2 + "px";
}
document.onmouseup = function() {
document.onmousemove = null;
}
}
</script>
</body>
</html>
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