Function toggleClass

modular/sortable.core.esm.js:172–181

(el, name, state)

}
var R_SPACE = /\s+/g;
function toggleClass(el, name, state) {
  if (el && name) {
    if (el.classList) {
      el.classList[state ? 'add' : 'remove'](name);
    } else {
      var className = (' ' + el.className + ' ').replace(R_SPACE, ' ').replace(' ' + name + ' ', ' ');
      el.className = (className + (state ? ' ' + name : '')).replace(R_SPACE, ' ');
    }
  }
}
function css(el, prop, val) {
  var style = el && el.style;
  if (style) {