Question

Anyone know a simple method to swap the background color of a webpage using JavaScript?

Answer 1

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.