Hogyan kell hogy minden fül lenyiljon az oldal betöltésekor?
<!DOCTYPE html>
<html>
<head>
<style>
button.accordion {
background-color: #eee;
color: #444;
cursor: pointer;
padding: 18px;
width: 100%;
border: none;
text-align: left;
outline: none;
font-size: 15px;
transition: 0.4s;
}
button.accordion.active, button.accordion:hover {
background-color: #ddd;
}
button.accordion:after {
content: '\002B';
color: #777;
font-weight: bold;
float: right;
margin-left: 5px;
}
button.accordion.active:after {
content: "\2212";
}
div.panel {
padding: 0 18px;
background-color: white;
max-height: 0;
overflow: hidden;
transition: max-height 0.2s ease-out;
}
</style>
</head>
<body>
<button class="accordion">1</button>
<div class="panel">
<p>Elso.</p>
</div>
<button class="accordion">2</button>
<div class="panel">
<p>Masodik.</p>
</div>
<button class="accordion">3</button>
<div class="panel">
<p>Harmadik.</p>
</div>
<script>
var acc = document.getElementsByClassName("accordion");
var i;
for (i = 0; i < acc.length; i++) {
acc[i].onclick = function() {
this.classList.toggle("active");
var panel = this.nextElementSibling;
if (panel.style.maxHeight){
panel.style.maxHeight = null;
} else {
panel.style.maxHeight = panel.scrollHeight + "px";
}
}
}
</script>
</body>
</html>
válasza:<script>
var acc = document.getElementsByClassName("accordion");
var i;
for (i = 0; i < acc.length; i++) {
var panel = acc[i].nextElementSibling;
panel.style.maxHeight = panel.scrollHeight + "px";
acc[i].onclick = function() {
this.classList.toggle("active");
var panel = this.nextElementSibling;
if (panel.style.maxHeight){
panel.style.maxHeight = null;
} else {
panel.style.maxHeight = panel.scrollHeight + "px";
}
}
}
</script>
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