How do I change the background color with JavaScript?

Question

Can anyone tell me a simple method to swap the background color of a webpage with JavaScript? 

Answer 1

To do that, you have to modify the JavaScript property document.body.style.background like below: 

function changeBackground(color) {

   document.body.style.background = color;

}

window.addEventListener("load",function() { changeBackground('red') });

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