index1.html?__hbt=1553998985572:48 Uncaught TypeError: Cannot read property 'style' of null
慕无忌1294876
2019-03-31 11:29
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>透明度</title>
<style>
*{
margin: 0;
padding: 0;
}
#div1{
width:200px;
height: 200px;
background: red;
filter: alpha(opacity:30);
opacity:0.3;
}
</style>
<script type="text/javascript">
window.onload = function(){
var oDiv = document.getElementById("div1");
oDiv.onmouseover = function(){
startMove(100);
}
oDiv.onmouseout = function(){
startMove(30);
}
}
var timer = null;
var alpha = 30;
function startMove(iTarget){
var oDiv = document.getElementById("#div1");
clearInterval(timer);
timer = setInterval(function(){
var speed = 0;
if(speed > iTarget){
speed = -10;
}else{
speed = 10;
}
if(alpha == iTarget){
clearInterval(timer);
}else{
alpha+=speed;
oDiv.style.filter = 'alpha(opactiy:'+alpha+')';
oDiv.style.opacity = alpha/100;
}
},30)
}
</script>
</head>
<body>
<div id="div1"></div>
</body>
</html>
2回答
-
- 精慕门9383623
- 2019-08-17 17:35:00
if(speed > iTarget){
speed = -10;
}else{
speed = 10;
}这不是speed>Tarfet,而是alpha > Target
-
- 慕移动3184862
- 2019-04-02 22:34:46
startMoe()函数中getElementById（）的括号里写错了应该是"div1"
JS动画效果
113924 学习 · 1443 问题
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