detect window scroll position jquery
This one adds or removes a class if the document is scrolled 50 px near the top of the window.
$(window).scroll(function() {
if ($(document).scrollTop() > 50) {
$('nav').addClass('shrink');
} else {
$('nav').removeClass('shrink');
}
});
We can monitor the scroll position with the following code, this will console log each scroll position counting from the top into console log.
$(window).scroll(function() {
console.log($(document).scrollTop());
});
lets say that we wanted the background of the page become pink (as you do) when we scroll down 100 px
something like this should do it
script
$(window).scroll(function() {
if ($(document).scrollTop() > 100) {
$('h1').addClass('pink');
} else {
$('h1').removeClass('pink');
}
});
css
.pink { color:#f3b4f0; }
scroll down to see the h1 and h3 color change, then back to the top to go back to original.
$(window).scroll(function() {
if ($(document).scrollTop() > 100) {
$('h1').addClass('pink');
} else {
$('h1').removeClass('pink');
}
});
you can also add the scroll top position into a div, if you cant be bothered looking at the console window.
Scroll Position: 0
$(window).scroll(function() {
$('#scrollpos').html($(document).scrollTop());
});
lets stick that to the bottom of the window, just so we can see where it at.
.scroll-pos {
font-size:16px;
background:rgba(0,0,0,0.9);
color:#FFF;
text-shadow:0px 1px 2px #000;
position:fixed;
bottom:0;
right:0;
padding:5px 10px;
}
With this code you can add it to a navigation to make it stick on scroll at a certain position. I might try that next.
Mmm.. padding
Javascript
$(window).scroll(function() {
console.log($(document).scrollTop());
});
$(window).scroll(function() {
if ($(document).scrollTop() > 100) {
$('h1').addClass('pink');
} else {
$('h1').removeClass('pink');
}
});
$(window).scroll(function() {
$('#scrollpos').html($(document).scrollTop());
});View Statistics
Add Comment
Other Items in js
Related Search Terms
Other Categories in Code
Random Quote
"Olivia, my eldest daughter, caught measles when she was seven years old. As the illness took its usual course I can remember reading to her often in bed and not feeling particularly alarmed about it. Then one morning, when she was well on the road to recovery, I was sitting on her bed showing her how to fashion little animals out of coloured pipe-cleaners, and when it came to her turn to make one herself, I noticed that her fingers and her mind were not working together and she couldn’t do anything. 'Are you feeling all right?' I asked her. 'I feel all sleepy,' she said. In an hour, she was unconscious. In twelve hours she was dead. The measles had turned into a terrible thing called measles encephalitis and there was nothing the doctors could do to save her. That was...in 1962, but even now, if a child with measles happens to develop the same deadly reaction from measles as Olivia did, there would still be nothing the doctors could do to help her. On the other hand, there is today something that parents can do to make sure that this sort of tragedy does not happen to a child of theirs. They can insist that their child is immunised against measles. ...I dedicated two of my books to Olivia, the first was ‘James and the Giant Peach’. That was when she was still alive. The second was ‘The BFG’, dedicated to her memory after she had died from measles. You will see her name at the beginning of each of these books. And I know how happy she would be if only she could know that her death had helped to save a good deal of illness and death among other children."
I just checked google books for BFG, and the dedication is there.
https://www.google.com.au/books/edition/_/quybcXrFhCIC?hl=en&gbpv=1
Roald Dahl, 1986