js实现html滑动图⽚拼图验证本⽂实例为⼤家分享了js实现html滑动图⽚拼图验证的具体代码，供⼤家参考，具体内容如下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">
<link rel="stylesheet" href="./index.css" >
<title>Document</title>
</head>
<body>
<div class="container">
<canvas width="310" height="155" id="canvas"></canvas>
<canvas width="310" height="155" id="block"></canvas>
<div class="refreshIcon"></div>
<div class="bar">
<div id="bar-mask">
<div class="verSliderBlock"></div>
</div>
<span id="slide">向右滑动验证</span>
</div>
</div>
<script src="./index.js"></script>
</body>
css:
*{
margin: 0;
padding: 0;
}
body {
background-color: #E8E8E8;
}
.container{
position: relative;
}
#canva{
background: indianred;
}
#block{
position: absolute;
left: 0px;
}
.refreshIcon{
position: absolute;
left: 280px;
top: 5px;
width: 21px;
height: 20px;
cursor: pointer;
background: url(./refresh.png);
display: block;
}
.verSliderBlock{
height: 40px;
width: 40px;
background-color: #fff;
background:url('./right_arrow.png');
background-size:100%;
box-shadow: 0 0 3px rgba(0, 0, 0, .3);
cursor: pointer;
position: absolute;
text-align: center;
line-height: 40px;
font-weight: 400;
}
.bar{
position: relative;
text-align: center;
width: 310px;
height: 40px;
line-height: 40px;
margin-top: 15px;
background: #f7f9fa;
color: #45494c;
border: 1px solid #e4e7eb;
display: block;
}
#bar-mask{
position: absolute;
left: 0;
top: 0;
height: 40px;
border: 0 solid #1991fa;
background: #d1e9fe;
}
js:
(function(window){
var canvas = ElementById('canvas');
var block = ElementById('block');
var canvas_ctx = Context('2d')
var block_ctx = Context('2d')
var img = ateElement('img')
var refresh = document.querySelector('.refreshIcon')
html图片展示特效var x = und(Math.random() * 200) + 10,
y = und(Math.random() * 100) + 10,
w = 42,
l = 42,
r = 10,
PI = Math.PI
console.log(x,y)
//获取图⽚后⾯的随机号码
function getRandomNumberByRange(start, end) {
und(Math.random() * (end - start) + start)
}
//初始化图⽚
function initImg(){
canvas_ctx.drawImage(img, 0, 0, 310, 155)
block_ctx.drawImage(img, 0, 0, 310, 155)
var blockWidth = w + r * 2
var _y = y - r * 2 + 2 // 滑块实际的y坐标
var ImageData = ImageData(x, _y, blockWidth, blockWidth)
block.width = blockWidth
block_ctx.putImageData(ImageData, 0, _y)
};
img.src = 'picsum.photos/300/150/?image=' + getRandomNumberByRange(0, 100) }
//清除tupian
function clean(){
x = und(Math.random() * 200) + 10,
y = und(Math.random() * 100) + 10,
console.log(x,y)
canvas_ctx.clearRect(0, 0, 310, 155);
block_ctx.clearRect(0, 0, 310, 155)
block.width = 310
draw(canvas_ctx, 'fill')
draw(block_ctx, 'clip')
}
//绘制⽅块
function draw(ctx, operation) {
ctx.arc(x + l / 2, y - r + 2, r, 0.72 * PI, 2.26 * PI)
ctx.lineTo(x + l, y)
ctx.arc(x + l + r - 2, y + l / 2, r, 1.21 * PI, 2.78 * PI)
ctx.lineTo(x + l, y + l)
ctx.lineTo(x, y + l)
ctx.arc(x + r - 2, y + l / 2, r + 0.4, 2.76 * PI, 1.24 * PI, true)
ctx.lineTo(x, y)
ctx.lineWidth = 2
ctx.fillStyle = 'rgba(255, 255, 255, 0.7)'
ctx.strokeStyle = 'rgba(255, 255, 255, 0.7)'
ctx.stroke()
ctx[operation]()
ctx.globalCompositeOperation = 'overlay'
}
initImg()
draw(canvas_ctx, 'fill')
draw(block_ctx, 'clip')
//添加移动事件
var block_slider = document.querySelector("#block");
var slider = document.querySelector(".verSliderBlock");
var slider_mark = document.querySelector("#bar-mask");
//⽤于判断当前是否是在按住滑块的情况下
var yd = false
var moveX = 0
var downX = 0
//⿏标按下
downX = e.clientX;
yd = true
}
//⿏标移动事件
function hadleMousemove(e) {
if (yd) {
moveX = e.clientX - downX;
document.querySelector('#slide').innerHTML = ''
if (moveX >= 310) {
moveX = 310 - 40
}
if (moveX > -2) {
slider.style.backgroundColor = "#1991FA";
slider_mark.style.borderWidth = "1px"
slider_mark.style.borderColor = "#1991fa"
slider_mark.style.width = moveX + 40 + "px";
block_slider.style.left = (310 - 40 - 20) / (310 - 40) * moveX + "px";  slider.style.left = moveX + "px";
}
}
}
//⿏标抬起事件
function hadleMouseup(e) {
if (yd) {
console.log(moveX)
block_slider.style.left = (310 - 40 - 20) / (310 - 40) * moveX + "px"; if (Math.abs((310 - 40 - 20) / (310 - 40) * moveX - x) < 10) {
slider.style.background = "url('./success.png')";
slider.style.backgroundSize = '100%'
// alert('验证成功')
setTimeout(() => {
rest();
}, 1000)
} else {
slider_mark.style.backgroundColor = "#fce1e1"
slider_mark.style.borderWidth = "1px"
slider_mark.style.borderColor = "#f57a7a"
slider.style.backgroundColor = "#f57a7a";
slider.style.background = "url('./fail.png')";
slider.style.backgroundSize = '100%'
setTimeout(() => {
rest();
}, 1000)
}
yd = false
}
}
//⿏标在按住滑块下移动
hadleMousemove(e)
}
//⿏标在滑块下抬起
hadleMouseup(e)
}
//设置全局的移动事件，当⿏标按下滑块后，移动过程中⿏标可能会移出滑块，这是滑块也会监听⿏标的移动进⾏相应的移动document.addEventListener('mousemove', function (e) {
hadleMousemove(e)
})
document.addEventListener('mouseup', function (e) {
hadleMouseup(e)
})
function rest() {
clean()
document.querySelector('#slide').innerHTML = '向右滑动验证'
slider.style.backgroundColor = "#fff";
slider.style.left = "0px"
slider.style.background = "url('./right_arrow.png')";
slider.style.backgroundSize = '100%'
block_slider.style.left = "0px"
slider_mark.style.width = "0px"
slider_mark.style.backgroundColor = "#d1e9fe"
slider_mark.style.borderWidth = "0px"
slider_mark.style.borderColor = "#d1e9fe"
initImg()
}
/
/刷新
rest()
}
}(window))
以上就是本⽂的全部内容，希望对⼤家的学习有所帮助，也希望⼤家多多⽀持。

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