Nodejs HTML Element Class Check is(elementSelector)

Method Source Code

Element.prototype.is = function(elementSelector) {
  switch (elementSelector[0]) {
    case '.':/*from  ww w  .  ja va 2s  .c o m*/
      var er = new RegExp(elementSelector.replace('.', ''))
      return this.className.match(er)
      break
    case '#':
      return this.getAttribute('id') === elementSelector.replace('#', '')
      break
    default:
      return this.tagName === elementSelector.toUpperCase()
      break
  }
}

Related

1. hasClass(classname)

   Element.prototype.hasClass = function (classname) {
       if (this == null) throw new TypeError();
       return this.className.split(' ').indexOf(classname) === -1 ? false : true;
   

2. hasClass(cls)

   Element.prototype.hasClass = function(cls) {
     return this.className.match(new RegExp('(\\s|^)'+cls+'(\\s|$)'));
   };
   

3. hasClass(selector)

   Element.prototype.hasClass=function(selector){
     if((" " + this.className + " ").replace(/[\n\t]/g, " ").indexOf(" " + selector + " ") > -1 ){
       return true;
     return false;
   };
   

4. hasStyleClass(className)

   Element.prototype.hasStyleClass = function(className) {
       if (!className)
           return false;
       if (this.className === className)
           return true;
       var regex = new RegExp("(^|\\s)" + className.escapeForRegExp() + "($|\\s)");
       return regex.test(this.className);
   };
   

5. classContains()

   HTMLElement.prototype.classContains = function() {
     var args = arguments;
     if (args.length < 1) {
       return false;
     for (var i = 0; i < args.length; i++) {
       var classList = this.classList;
       if (!classList.contains(args[i])) {
         return false;
   ...