jQuery scroll function only works once - javascript

I am trying to add a class to the header if the user scrolls past the div #home - and remove the class when you scroll back to the top.
The issue is, when you scroll past the div it adds the class but when you keep scrolling and then scroll back up, the class does not get removed. The event is only firing once...
I created this jsFiddle here - https://jsfiddle.net/breezy/9evksr7y/
It works in my jsFiddle file but not on my actual web page, I've also tried this...
$(window).on( 'scroll', function() {
var header = $('#header'),
target = $("#home").offset().top;
var interval = setInterval(function() {
if ($(window).scrollTop() > 400) {
// alert("made it!");
header.addClass('fixed');
clearInterval(interval);
} else {
header.removeClass('fixed');
}
}, 250);
});
But it still does not work. Any idea what I am doing wrong?
Thanks
Edit: The issue was that one of my other functions in the same document was conflicting w/ this scroll function.

So I made some minor tweaks to the code. Not sure what the issue was but this seemed to work for me on my webpage.
$(window).on('scroll', function() {
var header = $('#header'),
target = $("#home").offset().top;
if ($(window).scrollTop() > target) {
header.addClass('fixed');
} else {
header.removeClass('fixed');
}
});

Related

Add class to my <nav> when scroll using jQuery

I am trying to do a simple task but I just can't see what I am doing wrong.
My goal is to add a class on my <nav> when the user scroll to the bottom of the page, and remove it when the he scrolls back to top.
Here's the code. PS: There's no error message on my console, and I tested if the jQuery is correctly implemented (and it is). I'm using a recent version
<script type="text/javascript">
$(window).on('scroll', function() {
if($(window).scrollTop()){
$('nav').addClass('when-scroll');
}else {
$('nav').removeClass('when-scroll');
}
})
</script>
you can try this;
var scrollTop = $(window).scrollTop()
$(window).on('scroll', function() {
if($(window).scrollTop() < scrollTop){
$('nav').addClass('when-scroll');
}else {
$('nav').removeClass('when-scroll');
}
scrollTop = $(window).scrollTop()
})

jQuery scroll function does not work

I have this function:
$(document).ready(function() {
if ($(".splash").is(":visible")) {
$(".site").css({"opacity":"0"});
}
});
$(window).scroll(function(){
$(window).off("scroll");
$(".splash").slideUp("800", function() {
$("html, body").animate({"scrollTop":"0px"},100);
$(".site").delay(100).animate({"opacity":"1.0"},800);
});
})
I use this to pass from splash page to home in animation way. But when I'm in home page the scroll is still off and I need it to make a change in hte header. I use this code:
$(document).ready(function( $ ) {
$(window).scroll(function() {
var sT = $(this).scrollTop();
if (sT >= 200) {
$('header').addClass('scroll-header')
} else {
$('header').removeClass('scroll-header')
}
});
});
This two parts fight together!! How can I put on scroll after splash page to go out? Thanks!
In the end i have try to not use scroll off, and change with a simple
.show_splash{position: fixed;}
In this way finely work!!!

Accordion looping on resize

I have a menu that is hidden in an accordion when viewing on screens less than 600px.
On screens larger than 600px the menu is visible.
jsfiddle- http://jsfiddle.net/ashatron/zbzqoz2f/
it works ok, but when i resize the window to be greater than 600px, then go back to less than 600px then press view sitemap it loops the animation multiple times.
I think its running the function for every resize event, which is queing up the accordion and then looping it. But I'm not sure how best to order the syntax to get it to work.
Any help would be appreciated!
footernavmenufn = function() {
var current_width = $(window).width();
if (current_width < 600) {
$('.footer-accordion-head').show();
$('.footer-accordion-body').hide();
$('.footer-accordion-head').click(function () {
$(".footer-accordion-body").slideToggle('400');
// console.log('hmmm');
return false;
}).next().hide();
} else {
$('.footer-accordion-head').hide();
$('.footer-accordion-body').show();
}
};
$(document).ready(function () {
footernavmenufn();
});
$(window).resize(function(){
footernavmenufn();
//console.log('OMG-WHY-YOU-NO-WORK');
});
The issue is that everytime window is resized and the condition is met, you're binding a new click event handler, so after a while there'll be multiple event handlers causing chaos. Ideally your code should be something like
$(document).ready(function () {
$('.footer-accordion-head').click(function () {
$(".footer-accordion-body").slideToggle('400');
console.log('hmmm');
return false;
});
$(window).resize(footernavmenufn);
footernavmenufn(); // or $(window).trigger("resize");
});
footernavmenufn = function () {
var current_width = $(window).width();
if (current_width < 600) {
$('.footer-accordion-head').show();
$('.footer-accordion-body').hide();
} else {
$('.footer-accordion-head').hide();
$('.footer-accordion-body').show();
}
};
Updated Fiddle
Why do you have this code? Crazy one. Remove it:
if (current_width < 600) {
$('.footer-accordion-head').show();
$('.footer-accordion-body').hide();
$('.footer-accordion-head').click(function () {
$(".footer-accordion-body").slideToggle('400');
return false;
}
move the click declaration into the $(document).ready function.
at the moment everytime you resize the page that click function is being added again - so the repeat is once per page resize.
forked jsfiddle with change

Scrolling up and down by a set amount of pixels using jQuery scrollTop

I have a list of links in a div with overflow. What I want to happen is that the user can navigate in this menu of links with an up and down button. I want the div to scroll up or down by the height of 1 link element every time the user clicks the corresponding button. I tried out some code but I can't seem to figure out how to make it scroll the right amount in both directions. Can anyone help me out?
All the links have the same class.
Edit:
I have already managed to scroll up and down. Now I just need to scroll in little steps of the height of 1 link.
$(function() {
var ele = $('#scroller');
var speed = 10, scroll = 5, scrolling;
$('.scroller-btn-up').click(function() {
// Scroll the element up
scrolling = window.setInterval(function() {
ele.scrollTop( ele.scrollTop() - scroll );
}, speed);
});
$('.scroller-btn-down').click(function() {
// Scroll the element down
scrolling = window.setInterval(function() {
ele.scrollTop( ele.scrollTop() + scroll );
}, speed);
});
$('.scroller-btn-up, .scroller-btn-down').bind({
click: function(e) {
// Prevent the default click action
e.preventDefault();
},
mouseleave: function() {
if (scrolling) {
window.clearInterval(scrolling);
scrolling = false;
}
}
});
});
That should be easy enough using your current code, all you have to do is get rid of the interval to stop it from scrolling repeatedly. Then you won't need the mouseleave function either, you can set the scroll variable to the same value of the height of a link tag e.g. 20 for a 20px high link tag:
$(function() {
var ele = $('#scroller');
var scroll = 20;
$('.scroller-btn-up').click(function() {
// Scroll the element up
ele.scrollTop(ele.scrollTop() - scroll);
});
$('.scroller-btn-down').click(function() {
// Scroll the element down
ele.scrollTop(ele.scrollTop() + scroll);
});
$('.scroller-btn-up, .scroller-btn-down').bind({
click: function(e) {
// Prevent the default click action
e.preventDefault();
}
});
});

Make scrollTop to always check

I'm doing a scrollTop jQuery function, and it is working very nice, see it below:
$(function() {
$(window).scroll(function() {
var top = $(document).scrollTop();
if (top >= 1225) {
// Do something
}
});
});
However, if the user have his scrollTop, in that case, higher than 1225, and the script isn't fully loaded, the function will not happen, just if he scroll the page again. Isn't there a way to make the scrollTop to always check, not just if the user Scrolls the page?
Thanks a lot in Advance.
Yes, trigger the event yourself.
$(function() {
$(window).scroll(function() {
var top = $(document).scrollTop();
if (top >= 1225) {
// Do something
}
}).triggerHandler("scroll");
});

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