Check if HTML element has class

Use Element.classList and DOMTokenList.contains() to check if the element has the specified class.

const hasClass = (el, className) => el.classList.contains(className);

// EXAMPLE
hasClass(document.querySelector('p.special'), 'special'); // true

Source

https://www.30secondsofcode.org/js/s/has-class