<html>
<head>
<style>
.modal{
position: absolute;
border: 1px solid black;
top: 200px;
left:200px;
transform: translate(0, -100px);
transition: transform 2s;
display: none;
}
.change{
transform: translate(0, 0);
}
</style>
<script>
window.onload = function() {
var modal = document.getElementsByClassName('modal')[0];
var btn = document.getElementById('btn');
btn.onclick = function () {
modal.style.display = 'block';
modal.className += ' ' + 'change';
//setTimeout(function(){modal.className += ' ' + 'change';}, 1) //这样就有效果
}
}
</script>
</head>
<body>
<button id="btn">click</button>
<div class="modal">123</div>
</body>
</html>
这是我写的代码,为什么通过定时器添加就有效果?而直接添加却没用
<html>
<head>
<style>
.modal{
position: absolute;
border: 1px solid black;
top: 200px;
left:200px;
transform: translate(0, -100px);
transition: transform 2s;
opacity: 0;
}
.modal.change{
transform: translate(0, 0);
opacity: 1;
}
</style>
<script>
window.onload = function() {
var modal = document.getElementsByClassName('modal')[0];
var btn = document.getElementById('btn');
btn.onclick = function () {
//modal.style.display = 'block';
modal.className += ' ' + 'change';
//setTimeout(function(){modal.className += ' ' + 'change';}, 1) //这样就有效果
}
}
</script>
</head>
<body>
<button id="btn">click</button>
<div class="modal">123</div>
</body>
</html>
用opacity:0代替display:none;
因为是动画显示效果跟display
没关系,这个属性没有中间状态的!
顺便接上面大神的代码:
将其 Opacity
属性修改为 visibility
属性,毕竟这是一个显示或隐藏的问题,而不是透明度的问题,展示效果是差不多的,没试过哪种性能好,严谨严谨哈哈哈
<html>
<head>
<style>
.modal{
position: absolute;
border: 1px solid black;
top: 200px;
left:200px;
transform: translate(0, -100px);
transition: transform 2s;
visibility: hidden;
}
.modal.change{
transform: translate(0, 0);
visibility: visible;
}
</style>
<script>
window.onload = function() {
var modal = document.getElementsByClassName('modal')[0];
var btn = document.getElementById('btn');
btn.onclick = function () {
//modal.style.display = 'block';
modal.className += ' ' + 'change';
//setTimeout(function(){modal.className += ' ' + 'change';}, 1) //这样就有效果
}
}
</script>
</head>
<body>
<button id="btn">click</button>
<div class="modal">123</div>
</body>
</html>
可能是transition属性和display:hidden 结合使用有问题吧。如果你在执行了modal.style.display = 'block'; 之后阻塞一下,alert();动画效果就会展示出来。浏览器处理的时候可能是因为元素是隐藏的就把动画效果去掉了。