how to change a css variable with javascript

103

how to change css variable in javascript -

document.documentElement.setAttribute("style", "--main-background-color: green");

js set css variable -

document.documentElement.style.setProperty("--main-background-color", "green");

change css variable with javascript -

let root = document.documentElement;

root.addEventListener("mousemove", e => {
  root.style.setProperty('--mouse-x', e.clientX + "px");
  root.style.setProperty('--mouse-y', e.clientY + "px");
});

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