ScrollStepper

During scrolling prevents skipping over some important position on the page

Code example: window.scrollTo(window.pageXOffset, 0);

  var schema = {
    0: {'#test1': {active: {'class': 'active'}, inactive: {'class': ''}}},
    200: {'#test2': {active: {'class': 'active'}, inactive: {'class': ''}}},
    500: {'#test3': {active: {'class': 'active'}, inactive: {'class': ''}}},
    700: {'#test4': {active: {'class': 'active'}, inactive: {'class': ''}}},
    900: {'#test5': {active: {'class': 'active'}, inactive: {'class': ''}}},
    2000: {'#test6': {active: {'class': 'active'}, inactive: {'class': ''}}},
  };

  scrollStepper = new ScrollStepper(schema, 500); //schema, step delay

  body = document.getElementsByTagName('BODY')[0];
  body.style.height = (window.innerHeight + 2000) + 'px';

Results example: https://rawgit.com/mwkaicz/ScrollStepper/master/scrollSteps.html