sipadu_mbip/node_modules/dom-helpers/class/removeClass.js

'use strict';

function replaceClassName(origClass, classToRemove) {
  return origClass.replace(new RegExp('(^|\\s)' + classToRemove + '(?:\\s|$)', 'g'), '$1').replace(/\s+/g, ' ').replace(/^\s*|\s*$/g, '');
}

module.exports = function removeClass(element, className) {
  if (element.classList) element.classList.remove(className);else if (typeof element.className === 'string') element.className = replaceClassName(element.className, className);else element.setAttribute('class', replaceClassName(element.className && element.className.baseVal || '', className));
};