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JavaScript

Posted by gopi p
gopi p
9,259 Points

Adding new class for the div in view port

Hello Every one,

Now I'm working on playing with animation.i would like to know how to add a class to the div with is in view post .there are some js plugins but they didn't work for me (may be my mistake).currently i'm looking at a jQuery Waypoints plugin .here is the function i want to execute 1.first check a div with class .hand is in view port 2.if it is in view port then add additional classes .animated .slideInRight to the same div

Can any buddy let me know how to do this currently. really appropriate if any buddy can provide the required js code . Thanks in advance

2 Answers

Jonas Olausson
Jonas Olausson
9,161 Points
Jonas Olausson
Jonas Olausson
9,161 Points

Hi,

When you are saying view port, what are you referring to? Do you want to add a class if the device has a certain resolution, or do you want to add it based on orientation?

gopi p
gopi p
9,259 Points

i mean to say adding classes to a div when it is in visible screen resolution when we scroll down ...

Jonas Olausson
Jonas Olausson
9,161 Points
Jonas Olausson
Jonas Olausson
9,161 Points

Fair enough - I've created a small jsfiddle for you that you can check out: http://jsfiddle.net/G5MdA/

Here's where all the "magic" happends:

var one = $('.one'),
      two = $('.two'),
      three = $('.three'),
      top = $('.top');
$(window).scroll(function(){
    var scrollPos = $('body').scrollTop();

  if (scrollPos >= one.position().top && scrollPos <= one.position().top + parseInt(one.height())) {
      top.html('We have reached the first element');
  } else if (scrollPos >= two.position().top && scrollPos <= two.position().top + parseInt(two.height())) {
      top.html('We have reached the second element');
  } else if (scrollPos >= three.position().top && scrollPos <= three.position().top + parseInt(one.height())) {
      top.html('We have reached the third element');
  }
});