Reputation: 178
How can i resize a logo( es width: 100px ) in a header on mouse scrolling?
$('.logo').scroll(function() {
$(this).width(100);
$(this).off(); //removes the handler so that it only resizes once...
})
.header {
background-color: black;
}
.logo {
height:100px;
width: 100%;
background-image: url("http://unika.myarmah.it/skin/frontend/sns_simo/default/images/logo.png");
background-repeat: no-repeat;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="header">
<div class="logo"></div>
</div>
Upvotes: 1
Views: 1013
Reputation: 2863
Just use javascript:
Why? - Because its just as short as using jQuery.
after seeing the comments to the previous answer from the author, I have adjusted my example to include animation and reset when at the top of the page. Again - just use javascript, and for better performance benefits use CSS classes so that all paints are done in one cycle.
Update #1 jsfiddle - https://jsfiddle.net/113dn29z/16/
var logo = document.querySelector('.logo');
var handleResize = function(e) {
if (document.body.scrollTop === 0) {
logo.classList.remove("resize");
} else {
logo.classList.add("resize");
}
};
document.addEventListener('scroll', handleResize);
<div class="header">
<div class="logo">
</div>
</div>
body {
height: 9999px;
overflow: auto;
}
.header {
background-color: black;
}
.logo {
margin-top: 200px;
height:100px;
width: 100%;
background-color: red;
background-repeat: no-repeat;
transition: width 0.2s ease;
}
.logo.resize {
width: 100px;
}
old jsFiddle example - https://jsfiddle.net/113dn29z/10/
Upvotes: 1
Reputation: 1035
var logoHasResized = false;
$(document).on('scroll', function (e) {
if (window.scrollY == 0) {
$('.logo').animate({'width': '100%'}, 250);
logoHasResized = false;
} else if (logoHasResized == false) {
$('.logo').animate({'width': 100}, 250);
logoHasResized = true;
}
});
edit: Since you want it to go back when you scroll to the top of the page, i've added in a check to see if the animation has happened, as you don't want it to fire constantly.
Upvotes: 0