Created
April 5, 2019 09:08
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pure javascript add class and remove class functions
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| var els = document.getElementsByClassName('current-class-name'); | |
| removeClass(els, 'current-class-name'); | |
| addClass(els, 'new-class-name'); | |
| var el = document.getElementById('current-class-name'); | |
| removeClass([el], 'current-class-name'); | |
| addClass([el], 'new-class-name'); | |
| function addClass(elements, className) { | |
| for (var i = 0; i < elements.length; i++) { | |
| var element = elements[i]; | |
| if (element.classList) { | |
| element.classList.add(className); | |
| } else { | |
| element.className += ' ' + className; | |
| } | |
| } | |
| } | |
| function removeClass(elements, className) { | |
| for (var i = 0; i < elements.length; i++) { | |
| var element = elements[i]; | |
| if (element.classList) { | |
| element.classList.remove(className); | |
| } else { | |
| element.className = element.className.replace(new RegExp('(^|\\b)' + className.split(' ').join('|') + '(\\b|$)', 'gi'), ' '); | |
| } | |
| } | |
| } |
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