目录一、实现效果二、实现1、用法2、html3、js三、总结与思考一、实现效果 二、实现 实现其实很简单,mask蒙版就是平铺一个整屏的 div,设置背景颜色为透明 transpa
实现其实很简单,mask蒙版就是平铺一个整屏的 div,设置背景颜色为透明 transparent ,然后,再设置 outline 为半透明及足够宽就可以了,再用同样的方式创建一个 箭头 跟 警告 标签。
let maskIntroduceManage = new MaskIntroduceManage([
new MaskIntroduceItem('one','人生若只如初见'),
new MaskIntroduceItem('two','何事秋风悲画扇'),
new MaskIntroduceItem('five','等闲却变故人心'),
new MaskIntroduceItem('six','骊山语罢清宵半'),
new MaskIntroduceItem('four','却道故人心易变'),
new MaskIntroduceItem('finally','谢谢大家支持!')
])
maskIntroduceManage.benginIntroduce()
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
</head>
<style type="text/CSS">
*{
padding: 0;
margin: 0;
}
.content {
padding: 0;
display: flex;
flex-direction: row;
justify-content: space-between;
align-items: center;
width: 100%;
}
span {
width: 60px;
height: 60px;
line-height: 60px;
margin-left: 40px;
margin-top: 140px;
margin-bottom: 0px;
text-align: center;
display: block;
background-color: antiquewhite;
}
.finally {
width: 100px;
height: 100px;
background-color: cornsilk;
border-radius: 50%;
line-height: 100px;
text-align: center;
margin-top: 30px;
margin-left: auto;
margin-right: auto;
}
span:nth-of-type(1){
margin-top: 30px;
}
span:nth-of-type(2){
margin-top: 70px;
}
span:nth-of-type(3){
margin-top: 160px;
}
span:nth-of-type(4){
margin-top: 160px;
}
span:nth-of-type(5){
margin-top: 70px;
}
span:nth-of-type(6){
margin-top: 30px;
}
</style>
<body>
<div class="content">
<span id="one">纳</span>
<span id="two">兰</span>
<span id="three">容</span>
<span id="four">若</span>
<span id="five">作</span>
<span id="six">词</span>
</div>
<div class="finally" id="finally">
谢谢
</div>
</body>
<script src="./maskIntroduce.js"></script>
<script>
let maskIntroduceManage = new MaskIntroduceManage([
new MaskIntroduceItem('one','人生若只如初见'),
new MaskIntroduceItem('two','何事秋风悲画扇'),
new MaskIntroduceItem('five','等闲却变故人心'),
new MaskIntroduceItem('six','骊山语罢清宵半'),
new MaskIntroduceItem('four','却道故人心易变'),
new MaskIntroduceItem('finally','谢谢大家支持!')
])
maskIntroduceManage.benginIntroduce()
</script>
</html>
// 单元信息model
class MaskIntroduceItem {
// 需要引导的dom的ID
id
// 需要引导的dom功能描述
warming
constructor(id,warming){
this.id = id
this.warming = warming
}
}
// 遮罩操作类
class MaskIntroduceManage {
// 消息展示类集合
maskIntroduceItems
// 遮罩层
el
// 遮罩层提示框
warmingEl
// 指引肩头
guidanceEl
// 展示的第几个
currentShowIndex = 0
// 记录window事件
windowEvent = null
constructor(maskIntroduceItems){
this.maskIntroduceItems = maskIntroduceItems
}
// 添加消息展示类
addIntroduceItem(introduceItem){
this.maskIntroduceItems.push(introduceItem)
}
// body增加遮罩
addMaskToBody(){
//添加遮罩框
this.el = document.createElement('div')
this.el.style.cssText = 'position: fixed;background: transparent;outline:rgba(0, 0, 0, 0.5) 3500px solid;'
let body = document.getElementsByTagName('body')[0]
body.appendChild(this.el)
//添加提示框
this.warmingEl = document.createElement('div')
this.warmingEl.style.cssText = 'position:fixed;width:100px;background:white;border-radius: 10px;padding: 30px;font-size: 14px;'
body.appendChild(this.warmingEl)
//添加指引箭头
this.guidanceEl = document.createElement('div')
this.guidanceEl.style.cssText = 'position:fixed;width: 14px; height: 13px; background-color: white;clip-path: polyGon(50% 0,100% 100%,0 100%);'
body.appendChild(this.guidanceEl)
//设置body禁止滚动
body.style.overflow = 'hidden'
//保留window事件
if(window.onclick){
this.windowEvent = window.onclick
}
window.onclick = ()=>{
this.nextIntroduce()
}
}
// 开始引导
benginIntroduce(){
this.addMaskToBody()
this.nextIntroduce()
}
// 下一步
nextIntroduce(){
let maskIntroduceItem = this.maskIntroduceItems.length > 0 ? this.maskIntroduceItems[this.currentShowIndex] : null
if(!maskIntroduceItem){
return
}
let needIntroduceEl = document.getElementById(maskIntroduceItem.id)
//遮罩层的镂空位置
this.el.style.width = needIntroduceEl.offsetWidth + 'px'
this.el.style.height = needIntroduceEl.offsetHeight + 'px'
this.el.style.top = this.getElementPosition(needIntroduceEl).top + 'px'
this.el.style.left = this.getElementPosition(needIntroduceEl).left + 'px'
//设置对应倒角,但是由于背景颜色是透明的,所以,没有效果(???)
//this.el.style.borderRadius = window.getComputedStyle(needIntroduceEl,null)['border-radius']
this.currentShowIndex ++
//指引箭头位置
let guidanceElLeft = this.getElementPosition(needIntroduceEl).left + needIntroduceEl.offsetWidth / 2.0
this.guidanceEl.style.top = this.getElementPosition(needIntroduceEl).top + needIntroduceEl.offsetHeight + 20 + 'px'
this.guidanceEl.style.left = guidanceElLeft + 'px'
//提示框的位置
this.warmingEl.style.top = this.getElementPosition(this.guidanceEl).top + this.guidanceEl.offsetHeight - 4 + 'px'
let warmingElLeft = this.getElementPosition(needIntroduceEl).left - ((this.warmingEl.offsetWidth - needIntroduceEl.offsetWidth) / 2.0)
if(warmingElLeft < 0){
warmingElLeft = this.getElementPosition(needIntroduceEl).left + 10
}
if(warmingElLeft + this.warmingEl.offsetWidth > document.getElementsByTagName('body')[0].offsetWidth){
warmingElLeft = warmingElLeft - 10 - (this.warmingEl.offsetWidth - needIntroduceEl.offsetWidth) / 2.0
}
this.warmingEl.style.left = warmingElLeft + 'px'
this.warmingEl.innerHTML = maskIntroduceItem.warming
//最后一个展示完恢复window点击事件
if(this.currentShowIndex >= this.maskIntroduceItems.length){
setTimeout(() => {
//移除当前遮罩
this.el.remove()
//移除当前提示框
this.warmingEl.remove()
//移除箭头
this.guidanceEl.remove()
//设置body可以滚动
document.getElementsByTagName('body')[0].style.overflow = 'auto'
//恢复window事件
if(this.windowEvent){
window.onclick = this.windowEvent
}
}, 2000);
}
}
// 获取元素在屏幕的位置
getElementPosition(element){
var top = element.offsetTop
var left = element.offsetLeft
var currentParent = element.offsetParent;
while (currentParent !== null) {
top += currentParent.offsetTop
left += currentParent.offsetLeft
currentParent = currentParent.offsetParent
}
return {top,left}
}
}
实现原理特别简单,没有太多复杂的逻辑在里面,想通过当前“需要介绍”的标签的 borderRadius 来设置镂空部分的倒角值,但是背景颜色是透明的,因此设置了,可以生效但也没有效果。
到此这篇关于基于javascript简单实现一下新手引导效果的文章就介绍到这了,更多相关JavaScript实现新手引导内容请搜索编程网以前的文章或继续浏览下面的相关文章希望大家以后多多支持编程网!
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本文标题: 基于JavaScript简单实现一下新手引导效果
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