So, I was experimenting with the jQuery .animate() function and decided to change the background color of a div based on how many pixels the user scrolled. Surprisingly, it didn't work as expected. After switching to the .css() function instead, everything was smooth sailing. Curious about why this happened? Check out the jsFiddle link below.
Find the explanation in this jsFiddle link: https://jsfiddle.net/ag_dhruv/cb2sypmu/
According to information found in the jQuery API documentation:
The .animate() function enables the creation of animated effects on CSS properties that are numeric.
Animation Properties and Values
When animating properties, they should be transitioned to a single numerical value, with some exceptions; most non-numeric properties cannot be animated using basic jQuery functions (for instance,
width,height, orleftcan be animated, butbackground-colorcannot, unless the jQuery.Color plugin is employed).
emphasis added by author
Since Background Color is not a numeric property, it is not possible to animate it using the .animate() method.
If you are looking to create an animation effect for the background-color property, there are a couple of options available. You can either include jQueryUI or utilize a plugin specifically designed for this purpose:
$(function() {
var state = true;
$("#button").click(function() {
if (state) {
$("#effect").animate({
backgroundColor: "#aa0000",
color: "#fff",
width: 500
}, 1000);
} else {
$("#effect").animate({
backgroundColor: "#fff",
color: "#000",
width: 240
}, 1000);
}
state = !state;
});
});.toggler {
width: 500px;
height: 200px;
position: relative;
}
#button {
padding: .5em 1em;
text-decoration: none;
}
#effect {
width: 240px;
height: 135px;
padding: 0.4em;
position: relative;
background: #fff;
}
#effect h3 {
margin: 0;
padding: 0.4em;
text-align: center;
}<link rel="stylesheet" href="//code.jquery.com/ui/1.11.4/themes/smoothness/jquery-ui.css">
<script src="//code.jquery.com/jquery-1.10.2.js"></script>
<script src="//code.jquery.com/ui/1.11.4/jquery-ui.js"></script>
<div class="toggler">
<div id="effect" class="ui-widget-content ui-corner-all">
<h3 class="ui-widget-header ui-corner-all">Animate</h3>
<p>
Etiam libero neque, luctus a, eleifend nec, semper at, lorem. Sed pede. Nulla lorem metus, adipiscing ut, luctus sed, hendrerit vitae, mi.
</p>
</div>
</div>
<button id="button" class="ui-state-default ui-corner-all">Toggle Effect</button>jQuery UI comes with bundled jQuery Color plugins that offer color animations and various utility functions for handling colors.
Here's an additional tip to build upon the existing solutions: if you prefer not to rely on jQuery UI, consider using a lightweight jQuery plugin (just 2.7kB):
You can obtain the jquery.animate-colors.js or jquery.animate-colors.min.js directly from the project's site, or link it through CDN:
<script src="//cdn.jsdelivr.net/jquery.color-animation/1/mainfile"></script>
Once included, you can apply color animations in the following manner:
$('#demodiv').animate({color: '#E4D8B8'})
$('#demodiv').animate({backgroundColor: '#400101'})
$('#demodiv').animate({borderBottomColor: '#00346B'})
$('#demodiv').animate({borderColor: 'darkolivegreen'})
$('#demodiv').animate({color: 'rgba(42, 47, 76, 0.1)'})
The only way to animate the backgroundColor is with jQueryUI. In case you prefer not to rely on jQueryUI, you can simply switch classes and create CSS animations using transitions.
To achieve a dynamic background color animation using jQuery, you can use the css method instead of the animate() method. This approach eliminates the need for additional libraries and reduces the number of HTTP requests.
Here is a simple JavaScript function that accomplishes the task:
function changeBackgroundColor(elementId, color){
var element = document.getElementById(elementId);
element.style.transition = "background 1.0s linear 0s";
element.style.background = color;
}
You can view a working example here.
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