element.classList. Refer to the MDN page on
element.classList1 for more information. This works in every browser except IE 7 or earlier. An older version is hosted at public CDNs, allowing you to use this already small file at nearly zero size overhead. Use one of these URLs: - //email@example.com/classList.min.js - //firstname.lastname@example.org/classList.min.js If you would like other versions (such as the current one) hosted there, follow the instructions at https://github.com/jsdelivr/jsdelivr and https://github.com/cdnjs/cdnjs to prepare a pull request. 1: https://developer.mozilla.org/en/DOM/element.classList "MDN / DOM / element.classList"