jQuery match part of class with hasClass

You can use the startswith CSS3 selector to get those divs:

$('div[class^="project"]')

To check one particular element, you’d use .is(), not hasClass:

$el.is('[class^="project"]')

For using the exact /project\d/ regex, you can check out jQuery selector regular expressions or use

/(^|\s)project\d(\s|$)/.test($el.attr("class"))

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