jquery - how to check if element has any classes attached to it

Question

you would imagine this would be easy to implement, but oh well..

anyway, I have an element to which classes are added or removed based of interaction on the site.

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Answer 1

Use classList property on the HTML Element:

document.getElementById("mydiv").classList.length
document.querySelector("#mydiv").classList.length
$("#mydiv").prop('classList').length // jQuery method.

The classList gives the array of classes present for the element. So, .length will say if there's any class there.