这篇文章我们来了解“用JS实现滚动条事件的代码怎么样写?”的内容,小编通过实际的案例向大家展示了操作过程,简单易懂,有需要的朋友可以参考了解看看,那么接下来就跟随小编的思路来往下学习吧,希望对大家学习或工作能有帮助。
具体内容如下
代码:
<
html
>
<
head
>
<
meta
charset
=
"utf-8"
>
<
meta
name
=
"viewport"
content
=
"initial-scale=1.0, maximum-scale=1.0, user-scalable=no"
/>
<
title
></
title
>
<
style
>
body {
margin: 0;
padding: 0;
}
.cont {
height: 7000px;
}
#top {
position: fixed;
width: 100%;
height: 55px;
top: 0px;
left: 0px;
background-color: rosybrown;
display: none;
}
#left {
position: fixed;
width: 50px;
height: 400px;
top: 150px;
left: 50px;
background-color: cadetblue;
display: none;
}
#left ul {
list-style: none;
padding-left: 0px;
}
#left ul li {
border: 1px solid white;
/*color: azure;*/
height: 30px;
line-height: 30px;
text-align: center;
margin: 15px auto;
/*display: none;*/
}
.a {
background-color: burlywood;
color: #FFFFFF;
}
</
style
>
<
script
>
//滚动事件
function myScroll() {
var i = document.body.scrollTop;
var top = document.getElementById("top");
var left = document.getElementById("left");
var f1 = document.getElementById("f1");
var f2 = document.getElementById("f2");
var f3 = document.getElementById("f3");
var f4 = document.getElementById("f4");
var f5 = document.getElementById("f5");
var f6 = document.getElementById("f6");
//控制顶部
if(i >= 1000) {
top.style.display = "block";
top.innerHTML = i;
} else {
top.style.display = "none";
}
//控制左侧
if(i >= 2000) {
left.style.display = "block";
} else {
left.style.display = "none";
}
//显示楼层
if(i >= 2000 && i <= 2500) {
f1.className = "a";
f2.className = "";
f3.className = "";
f4.className = "";
f5.className = "";
f6.className = "";
} else if(i > 2500 && i <= 3000) {
f1.className = "";
f2.className = "a";
f3.className = "";
f4.className = "";
f5.className = "";
f6.className = "";
} else if(i > 3000 && i <= 3500) {
f1.className = "";
f2.className = "";
f3.className = "a";
f4.className = "";
f5.className = "";
f6.className = "";
} else if(i > 3500 && i <= 4000) {
f1.className = "";
f2.className = "";
f3.className = "";
f4.className = "a";
f5.className = "";
f6.className = "";
} else if(i > 4000 && i <= 4500) {
f1.className = "";
f2.className = "";
f3.className = "";
f4.className = "";
f5.className = "a";
f6.className = "";
} else if(i > 4500 && i <= 5000) {
f1.className = "";
f2.className = "";
f3.className = "";
f4.className = "";
f5.className = "";
f6.className = "a";
}
}
</
script
>
</
head
>
<
body
onscroll
=
"myScroll()"
>
<
div
id
=
"left"
>
<
ul
>
<
li
id
=
"f1"
>1F</
li
>
<
li
id
=
"f2"
>2F</
li
>
<
li
id
=
"f3"
>3F</
li
>
<
li
id
=
"f4"
>4F</
li
>
<
li
id
=
"f5"
>5F</
li
>
<
li
id
=
"f6"
>6F</
li
>
</
ul
>
</
div
>
<
div
id
=
"top"
></
div
>
<
div
class
=
"cont"
></
div
>
</
body
>
</
html
>
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