JavaScript Add Class Quick Tip: Add or Remove a CSS Class with Vanilla JavaScript Body If that argument is truthy, toggle acts as add, if it's falsy, it acts as though you called remove. … This method removes a single, multiple or all classes from each element in the set of matched elements. Add class javascript - 3 ways. While working on the front-end, we often need to add CSS dynamically to an HTML element. If it's present, do nothing. Cancel some CSS Style. function. Using the jQuery toggleClass() can add or remove one or more classes from the selected html elements. Tip: Also see How To Add A Class. Tip: Learn more about the classList property in our JavaScript Reference. ; Remove the target attribute by calling the removeAttribute() on the selected link element. … In JavaScript, we have a classList property which contains a add() method that … JavaScript removeAttribute(): Remove the Attribute from an Element