Function addClass

external/.scrollLibs.js:618–623

(node, cls)

  }

  function addClass(node, cls) {
    var current = node.className
    if (!classTest(cls).test(current)) {
      node.className += (current ? " " : "") + cls
    }
  }
  function joinClasses(a, b) {
    var as = a.split(" ")
    for (var i = 0; i < as.length; i++) {