Detecting When User Scrolls to Bottom of Div with Jquery

Detecting when user scrolls to bottom of div with jQuery

There are some properties/methods you can use:

$().scrollTop()//how much has been scrolled
$().innerHeight()// inner height of the element
DOMElement.scrollHeight//height of the content of the element

So you can take the sum of the first two properties, and when it equals to the last property, you've reached the end:

jQuery(function($) {
    $('#flux').on('scroll', function() {
        if($(this).scrollTop() + $(this).innerHeight() >= $(this)[0].scrollHeight) {
            alert('end reached');
        }
    })
});

http://jsfiddle.net/doktormolle/w7X9N/

Edit: I've updated 'bind' to 'on' as per:

As of jQuery 1.7, the .on() method is the preferred method for attaching event handlers to a document.

Check if a user has scrolled to the bottom (not just the window, but any element)

Use the .scroll() event on window, like this:

$(window).scroll(function() {
   if($(window).scrollTop() + $(window).height() == $(document).height()) {
       alert("bottom!");
   }
});

You can test it here, this takes the top scroll of the window, so how much it's scrolled down, adds the height of the visible window and checks if that equals the height of the overall content (document). If you wanted to instead check if the user is near the bottom, it'd look something like this:

$(window).scroll(function() {
   if($(window).scrollTop() + $(window).height() > $(document).height() - 100) {
       alert("near bottom!");
   }
});

You can test that version here, just adjust that 100 to whatever pixel from the bottom you want to trigger on.

Detecting end of scroll in a div

You can use element.scrollTop + element.offsetHeight>= element.scrollHeight to detect scroll end.

Update:
Also adding a condition so that it won't fire when scrolling upwards.
For more on upward scroll condition,you can check this link.

const element = document.getElementById('element');
let lastScrollTop = 0;
element.onscroll = (e)=>{
if (element.scrollTop < lastScrollTop){
      // upscroll 
      return;
   } 
   lastScrollTop = element.scrollTop <= 0 ? 0 : element.scrollTop;
    if (element.scrollTop + element.offsetHeight>= element.scrollHeight ){
       console.log("End");
    }
}

#element{
  background:red;
  max-height:300px;
  overflow:scroll;
}
.item{
height:100px;
}

<div id="element">
<div class="item">item</div>
<div class="item">item</div>
<div class="item">item</div>
<div class="item">item</div>
<div class="item">item</div>
</div>

How to detect when a user has scrolled to the bottom of a div in jQuery?

Thanks to Elham linking me to this page https://www.w3docs.com/tools/code-editor/10827 the page had a negative value on it's if statement I added -100 to my if statement and that gave the event a bit of padding and it works every time.

jQuery(function ($) {
    $('#terms').bind('scroll', function () {
      if ($(this).scrollTop() + $(this).height() >= $(this)[0].scrollHeight - 100) {
                alert('end')
            }
        })
    });

Detecting when user scrolls to bottom of div with React js

you can use el.getBoundingClientRect().bottom to check if the bottom has been viewed

isBottom(el) {
  return el.getBoundingClientRect().bottom <= window.innerHeight;
}

componentDidMount() {
  document.addEventListener('scroll', this.trackScrolling);
}

componentWillUnmount() {
  document.removeEventListener('scroll', this.trackScrolling);
}

trackScrolling = () => {
  const wrappedElement = document.getElementById('header');
  if (this.isBottom(wrappedElement)) {
    console.log('header bottom reached');
    document.removeEventListener('scroll', this.trackScrolling);
  }
};

How can I determine if a div is scrolled to the bottom?

You're pretty close using scrollTop == scrollHeight.

scrollTop refers to the top of the scroll position, which will be scrollHeight - offsetHeight

Your if statement should look like so (don't forget to use triple equals):

if( obj.scrollTop === (obj.scrollHeight - obj.offsetHeight))
{
}

Edit: Corrected my answer, was completely wrong

Detect if user has scrolled to the bottom of a div

You'll probably have to do some math yourself, based on the current screen size and the div position. The code will look roughly like this (untested):

// Cache these values. If the div size changes, divBottom will need to be recalculated.
var $div = $("#yourdiv");
var divBottom = $div.offset().top + parseInt($div.height());

// Bind a scroll event for the whole page
$("body").bind("scroll", function(e)
{
    // Calculate how far down the user has scrolled
    var screenBottom = $(this).scrollTop() + parseInt($(window).height());

    // Test if the div has been revealed
    if(screenBottom > divBottom)
    {
        // do something
    }
});

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