JAVASCRIPT

style font size javascript

document.getElementById("your element").style.fontSize = "20%"

javascript style font size

document.getElementById("foo").style.fontSize = "18"

fontsize javascript

document.getElementById("demo").style.fontSize = "14px";

javascript style fontsize

let selected = document.GetElementById('selected');
selected.setAttribute(
          "style",
          `font-weight:bold; font-size: 20px; color: ${newColor};  background-color: lightgray;`
        );

how to get font size in javascript

const element = document.querySelector("#id");
const size = window.getComputedStyle(element).getPropertyValue("font-size");