how to change css with js

//Pure JavaScript DOM
var el = document.getElementById("elementID"); = "cssattribute";

//When doing A CSS property that have multiple words, its typed differently
//Instead of spaces or dashes, use camelCase
//Example: = "blue";

//Make sure before using jQuery, link the jQuery library to your code
//JavaScript with jQuery
//jQuery can use CSS property to fid=nd an element
$("#elementID").css("css-property", "css-attribute");

//On jQuery, the CSS property is typed like normal CSS property
$("#elementID").css("background-color", "blue");

//If you want multiple property for jQuery, you can stack them on one code
//instead of typing each attribute
$("#elementID").css({"css-property": "css-attribute", "css-property": "css-attribute"});

//you can also make them nice by adding line breaks
  "css-property": "css-attribute",
  "css-property": "css-attribute"});
//You can add as much CSS property and attribute as you want
//just make sure, always end it with a comma before adding another one
//the last property doesn't need a comma

<p id="p2">Hello World!</p>

document.getElementById("p2").style.color = "blue";

<p>The paragraph above was changed by a script.</p>

</html>// select element from DOM
const el = document.querySelector('.para')
// change css style = 'purple'document.querySelector('h1', container).style.backgroundColor = 'red';

Also in JavaScript: