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@jjmu15
Created January 27, 2014 10:08
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has class function - vanilla JS. Check if element has specified class
// hasClass, takes two params: element and classname
function hasClass(el, cls) {
return el.className && new RegExp("(\\s|^)" + cls + "(\\s|$)").test(el.className);
}
/* use like below */
// Check if an element has class "foo"
if (hasClass(element, "foo")) {
// Show an alert message if it does
alert("Element has the class!");
}
@FezVrasta
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FezVrasta commented Jul 15, 2016

What about element.classList.includes(classToFind)?

You may need a polyfill for includes or:

element.classList.indexOf(classToFind) !== -1

@andfinally
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Fez, I think that should be element.className.includes(classToFind) and you'd have to polyfill for IE. The second suggestion looks simpler, if you're not worried about the issue @ignacioiglesias mentioned.

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