Reputation: 12570
Anyone know a simple method to swap the background color of a webpage using JavaScript?
Upvotes: 205
Views: 921397
Reputation: 45
It can be achieved using
document.body.style.color.backgroundColor = "#000000";
Upvotes: -2
Reputation: 3351
To change background color with javascript you can apply
style.background
or style.backgroundColor
on the element you want to change background for.
The below example changes the background color of the body when you
click an element using style.background
property.
function pink(){ document.body.style.background = "pink"; }
function sky(){ document.body.style.background = "skyblue"; }
<p onclick="pink()" style="padding:10px;background:pink">Pink</p>
<p onclick="sky()" style="padding:10px;background:skyblue">Sky</p>
Another approach could be by adding a CSS class using javascript that gives a background to the element it is attached.
You can see more ways to add class using javascript but here you can
simply use classList.add()
property.
function addClass(yourClass){
document.body.classList.remove("sky", "pink");
document.body.classList.add(yourClass);
}
.pink {
background: pink;
}
.sky {
background: skyblue;
}
<p onclick="addClass('pink')" style="padding:10px;background:pink">Pink</p>
<p onclick="addClass('sky')" style="padding:10px;background:skyblue">Sky</p>
Upvotes: 5
Reputation: 847
so you can done very easily by just calling a function like
function changeBg()
{
document.body.style.color.backgroundColor="#ffffff";
}
Upvotes: 1
Reputation: 35
<p id="p1">Hello, Moazzam!</p>
<p >Hello, Moazzam!</p>
<p >Hello, Moazzam!</p>
<script type="text/javascript">
document.getElementById("p1").style.color= "#ff0000"; // red
</script>
Upvotes: -4
Reputation: 1210
Alternatively, if you wish to specify the background color value in rgb notation then try
document.getElementById("yourid").style.backgroundColor = `rgb(${a}, ${b}, ${c})`;
where a,b,c are the color values
Example:
document.getElementById("yourid").style.backgroundColor = 'rgb(224,224,224)';
Upvotes: 2
Reputation: 29
<!DOCTYPE html>
<html>
<body>
<select name="" id="select" onClick="hello();">
<option>Select</option>
<option style="background-color: #CD5C5C;">#CD5C5C</option>
<option style="background-color: #F08080;">#F08080</option>
<option style="background-color: #FA8072;">#FA8072</option>
<option style="background-color: #E9967A;">#E9967A</option>
<option style="background-color: #FFA07A;">#FFA07A</option>
</select>
<script>
function hello(){
let d = document.getElementById("select");
let text = d.options[d.selectedIndex].value;
document.body.style.backgroundColor=text;
}
</script>
</body>
</html>
Upvotes: 2
Reputation:
Modify the JavaScript property document.body.style.background
.
For example:
function changeBackground(color) {
document.body.style.background = color;
}
window.addEventListener("load",function() { changeBackground('red') });
Note: this does depend a bit on how your page is put together, for example if you're using a DIV container with a different background colour you will need to modify the background colour of that instead of the document body.
Upvotes: 259
Reputation: 193
You can change background of a page by simply using:
function changeBodyBg(color){
document.body.style.background = color;
}
Read more @ Changing the Background Color
Upvotes: 0
Reputation: 163
if you wish to use a button or some other event, just use this in JS:
document.querySelector("button").addEventListener("click", function() {
document.body.style.backgroundColor = "red";
});
Upvotes: 3
Reputation: 13416
Add this script element to your body element, changing the color as desired:
<body>
<p>Hello, World!</p>
<script type="text/javascript">
document.body.style.backgroundColor = "#ff0000"; // red
</script>
</body>
Upvotes: 2
Reputation: 9
I would suggest the following code:
<div id="example" onClick="colorize()">Click on this text to change the
background color</div>
<script type='text/javascript'>
function colorize() {
var element = document.getElementById("example");
element.style.backgroundColor='#800';
element.style.color='white';
element.style.textAlign='center';
}
</script>
Upvotes: 0
Reputation: 183
This will change the background color according to the choice of user selected from the drop-down menu:
function changeBG() {
var selectedBGColor = document.getElementById("bgchoice").value;
document.body.style.backgroundColor = selectedBGColor;
}
<select id="bgchoice" onchange="changeBG()">
<option></option>
<option value="red">Red</option>
<option value="ivory">Ivory</option>
<option value="pink">Pink</option>
</select>
Upvotes: 2
Reputation: 4245
I agree with the previous poster that changing the color by className
is a prettier approach. My argument however is that a className
can be regarded as a definition of "why you want the background to be this or that color."
For instance, making it red is not just because you want it red, but because you'd want to inform users of an error. As such, setting the className AnErrorHasOccured
on the body would be my preferred implementation.
In css
body.AnErrorHasOccured
{
background: #f00;
}
In JavaScript:
document.body.className = "AnErrorHasOccured";
This leaves you the options of styling more elements according to this className
. And as such, by setting a className
you kind of give the page a certain state.
Upvotes: 23
Reputation: 53
Css approach:
If you want to see continuous colour, use this code:
body{
background-color:black;
animation: image 10s infinite alternate;
animation:image 10s infinite alternate;
animation:image 10s infinite alternate;
}
@keyframes image{
0%{
background-color:blue;
}
25%/{
background-color:red;
}
50%{
background-color:green;
}
75%{
background-color:pink;
}
100%{
background-color:yellow;
}
}
If you want to see it faster or slower, change 10 second to 5 second etc.
Upvotes: 5
Reputation: 78687
I would prefer to see the use of a css class here. It avoids having hard to read colors / hex codes in javascript.
document.body.className = className;
Upvotes: 3
Reputation: 7289
You can do it in following ways STEP 1
var imageUrl= "URL OF THE IMAGE HERE";
var BackgroundColor="RED"; // what ever color you want
For changing background of BODY
document.body.style.backgroundImage=imageUrl //changing bg image
document.body.style.backgroundColor=BackgroundColor //changing bg color
To change an element with ID
document.getElementById("ElementId").style.backgroundImage=imageUrl
document.getElementById("ElementId").style.backgroundColor=BackgroundColor
for elements with same class
var elements = document.getElementsByClassName("ClassName")
for (var i = 0; i < elements.length; i++) {
elements[i].style.background=imageUrl;
}
Upvotes: 12
Reputation: 1321
But you would want to configure the body color before the <body>
element exists. That way it has the right color from the get go.
<script>
var myColor = "#AAAAAA";
document.write('\
<style>\
body{\
background-color: '+myColor+';\
}\
</style>\
');
</script>
This you can put in the <head>
of the document or in your js file.
Here is a nice color to play with.
var myColor = '#'+(Math.random()*0xFFFFFF<<0).toString(16);
Upvotes: 0
Reputation: 10619
You can change background of a page by simply using:
document.body.style.background = #000000; //I used black as color code
However the below script will change the background of the page after every 3 seconds using setTimeout() function:
$(function() {
var colors = ["#0099cc","#c0c0c0","#587b2e","#990000","#000000","#1C8200","#987baa","#981890","#AA8971","#1987FC","#99081E"];
setInterval(function() {
var bodybgarrayno = Math.floor(Math.random() * colors.length);
var selectedcolor = colors[bodybgarrayno];
$("body").css("background",selectedcolor);
}, 3000);
})
Upvotes: 4
Reputation: 239988
AJAX is getting data from the server using Javascript and XML in an asynchronous fashion. Unless you want to download the colour code from the server, that's not what you're really aiming for!
But otherwise you can set the CSS background with Javascript. If you're using a framework like jQuery, it'll be something like this:
$('body').css('background', '#ccc');
Otherwise, this should work:
document.body.style.background = "#ccc";
Upvotes: 12
Reputation: 10967
You don't need AJAX for this, just some plain java script setting the background-color property of the body element, like this:
document.body.style.backgroundColor = "#AA0000";
If you want to do it as if it was initiated by the server, you would have to poll the server and then change the color accordingly.
Upvotes: 85
Reputation: 32078
I wouldn't really class this as "AJAX". Anyway, something like following should do the trick:
document.body.style.backgroundColor = 'pink';
Upvotes: 5