ScrollCss-Menage-your-css-class-on-scroll

http://codepen.io/davideTessari/pen/bBypzG

Menage your css class on scroll in javascript (typescript).

Class usage:

/* Parameters */
var element = [".element1","#element2"];      // Array or string with the css/id selector
var className = ["css_class1","css_class2"]; // Array or string with the css
var reverse = true;                          // boolean Optional. When you exit at the range of the element the css class is removed
var associates = false;                      // boolean Optional. associates the first class with the first element and so on...
var range = 300;                             // number optional. The range of the trigger.

/* class */
var an = new ScrollCss(element, className, reverse, associates, range);