Im using a scroll function this works perfect whenever I use normal text for it, but whenever I use Text<br>Text<p> it wont scroll automaticly because there is a<p> or <br> what to do to make it also scroll for once with other elements.
And is there a simple way to use it for all $('#scrollDiv') istead of copy paste it above every line?
Example usage:
//This scrolls correct
$('#scrollDiv').append('Hello world!');
scrollDiv($('.scroll-text:eq(0)'));
//This wont work scrolling
$('#scrollDiv').append('Hello<br>world!');
scrollDiv($('.scroll-text:eq(0)'));
//This also wont work
$('#scrollDiv').append('<span style="font-size:100px;">Hello</span>');
scrollDiv($('.scroll-text:eq(0)'));
function scrollDiv($div, h){
var scrollHeight = $div[0].scrollHeight;
var scrollTop = $div[0].scrollTop;
var height = $div[0].clientHeight;
var h_invisible = scrollHeight - scrollTop - height;
if(h){
if(h>h_invisible){
$div.scrollTop(1e5);
}
}else{
if(15>h_invisible){
$div.scrollTop(1e5);
}
}
}
scrollDiv($('.scroll-text:eq(0)'), 50);
could help you out..
Related
In a nutshell I'm creating a sticky button that shows after the scroll position pass a target element on the page. I'm trying to calculate the distance from the top of the page to the bottom of the target element. The script below seems to work find on load but if I resize the browser the numbers are not recalculated to get the correct distance. I know I should be using another event listener like "on resize" but I can't seem to get the logic right with my current code. Any help is welcome thanks!
Current Code
$(function(){
function ctaBundle(){
//target element
var cardsContainer = document.querySelector('.card-block');
// calculate the distance from top to the bottom of target element plus padding offset
var elDistanceToTop = window.pageYOffset + cardsContainer.getBoundingClientRect().bottom - 48;
//using to only trigger on mobile using mql
var mq = window.matchMedia('(max-width: 30em)');
//function with if statement to fade in if you pass target element
$(window).on('scroll', function() {
if ($(this).scrollTop() > elDistanceToTop && mq.matches) {
$(".sticky-cta-double").fadeIn();
}else{
$(".sticky-cta-double").hide();
}
});
}
ctaBundle();
});
I think I figured it out. By removing the on scroll event in the function and adding both event listeners after the function it seems to work.
$(function(){
function ctaBundle(){
var cardsContainer = document.querySelector('.card-block');
var bundleHeader = document.querySelector('.bundle-header');
var elDistanceToTop = window.pageYOffset + cardsContainer.getBoundingClientRect().bottom - 48;
var mq = window.matchMedia('(max-width: 30em)');
if ($(this).scrollTop() > elDistanceToTop && mq.matches) {
$(".sticky-cta-double").fadeIn();
}else{
$(".sticky-cta-double").hide();
}
}
ctaBundle();
window.addEventListener('resize', ctaBundle, false);
window.addEventListener('scroll', ctaBundle, false);
});
If anyone has a better answer/logic please let me know but this seems to be working as intended now.
I've looked at several tutorials online and a few similar questions on SO but not been able to work out how to make the screen autoscroll left and right so that my #sheep stays in the centre of the screen.
I'm using javascript and jquery to move a simple div across the screen.
Here's my jsfiddle
http://jsfiddle.net/JosephByrne/CkkVr/
What's the best method of making the screen follow my div?
I think you're trying to move the wrong element left/right. I think you need to leave your sheep in the middle of the screen then move the background.
Something like:
var walkLeft = function() {
$('#background').animate({left:"-=10px",top:"-=2px"}, 100);
$('#background').animate({left:"-=10px",top:"+=2px"}, 100);
};
var walkRight = function() {
$('#background').animate({left:"+=10px",top:"-=2px"}, 100);
$('#background').animate({left:"+=10px",top:"+=2px"}, 100);
};
http://jsfiddle.net/CkkVr/22/ (you'll need to "jump right" to see the sheep), but you get the general idea!
You need something similar to this:
function scrollContainer() {
var $sheep = $("#sheep");
$("body").scrollLeft($sheep.position().left + $sheep.width());
}
That utilizes jQuery's scrollLeft() function as well as the position() function (on the sheep).
You just need to keep messing with the math until it works out properly...
I've implemented it on the "jump" functions here:
http://jsfiddle.net/Dxe8a/11/
function scrollContainer() {
var $sheep = $("#sheep");
var $body = $("body");
var windowWidthOver2 = ($(window).width()/2);
var pos = $sheep.position().left + windowWidthOver2 - $sheep.width() - 80;
if($body.width() <= (pos + windowWidthOver2 - $sheep.width() - 80)) {
$body.width($body.width() + windowWidthOver2);
}
$body.scrollLeft(pos);
}
You should alter it so that it looks a bit better, but at least it follows your sheep somewhat.
P.S. it works better in fiddle if you view it in "/show": http://jsfiddle.net/Dxe8a/11/show
On my website, I have a sidebar DIV on the left and a text DIV on the right. I wanted to make the sidebar follow the reader as he or she scrolls down so I DuckDuckGo'ed a bit and found this then modified it slightly to my needs:
<script type='text/javascript'>//<![CDATA[
$(window).load(function(){
$(function(){
var $sidebar = $('#sidebar'),
sidebarOffset = $sidebar.offset(),
$window = $(window),
gap = $('#header').css('marginBottom').replace(/[^-\d\.]/g, ''),
distance = ($window.scrollTop()) - (sidebarOffset.top - gap),
footerHeight = $('#footer').outerHeight();
$window.scroll(function(){
distance = ($window.scrollTop()) - (sidebarOffset.top - gap);
if ( distance > 0 ) {
$sidebar.css({'top': gap + 'px', 'position' : 'fixed'});
} else {
$sidebar.css({'top': '0', 'position': 'relative'});
}
})
});
});//]]>
</script>
And it works just like I want it to. However, my website uses Skeleton framework to handle responsive design. I've designed it so that when it goes down to mobile devices (horizontal then vertical), sidebar moves from being to the left of the text to being above it so that text DIV can take 100% width. As you can probably imagine, this script causes the sidebar to cover parts of text as you scroll down.
I am completely new to jQuery and I am doing my best through trial-and-error but I've given up. What I need help with is to make this script not execute if a certain DIV has a certain CSS value (i.e. #header-logo is display: none).
Ideally, the script should check for this when user resizes the browser, not on website load, in case user resizes the browser window from normal size to mobile size.
I imagine it should be enough to wrap it in some IF-ELSE statement but I am starting to pull the hair out of my head by now. And since I don't have too much hair anyway, I need help!
Thanks a lot in advance!
This function will execute on window resize and will check if #header-logo is visible.
$(window).resize(function() {
if ($('#header-logo').is(':visible')) {
// Your code
}
});
I think you need to check this on load to, because you don't know if the user will start with mobile view or not. You could do something like this:
$(window).resize(function() {
if ($('#header-logo').is(':visible')) {
// Your code
}
}).resize();
This will get executed on load and on resize.
EDIT: You will probably need to turn off the scroll function if #header-logo is not visible. So, instead of create the function inside the scroll event, you need to create it outside:
$(window).resize(function() {
if ($('#header-logo').is(':visible')) {
var $sidebar = $('#sidebar'),
sidebarOffset = $sidebar.offset(),
$window = $(window),
gap = $('#header').css('marginBottom').replace(/[^-\d\.]/g, ''),
distance = ($window.scrollTop()) - (sidebarOffset.top - gap),
footerHeight = $('#footer').outerHeight();
function myScroll() {
distance = ($window.scrollTop()) - (sidebarOffset.top - gap);
if ( distance > 0 ) {
$sidebar.css({'top': gap + 'px', 'position' : 'fixed'});
} else {
$sidebar.css({'top': '0', 'position': 'relative'});
}
}
$window.on('scroll', myScroll);
} else {
$(window).off('scroll', myScroll);
}
});
Didn't test it, but you get the idea.
$("#headerLogo").css("display") will get you the value.
http://api.jquery.com/css/
I also see you only want this to happen on resize, so wrap it in jquery's resize() function:
https://api.jquery.com/resize/
I've been working on a scroll to top function for my website, and that part of it works fine. My problem is however that I have a fixed div that is overlapping my footer when it hits the bottom of the page.
Here is the function that I have working.
$(document).scroll(function (e) {
if (document.body.scrollTop >= 800) {
$('#beamUp').show(1000);
} else {
$('#beamUp').hide(1000);
return false;
}
});
Is there somehow I could detect when I hit that part of the page and stop the div from moving past that.Help is much appreciated!
jsFiddle: http://jsfiddle.net/zazvorniki/RTDpw/
Just get the height of the page, minus the height of the div in question, as well as the footer... make sure the top is never greater than that value... you'll also need an onresize event handler re-evaluate that value.
looking at your jsfiddle... here are my edits
In your scroll listener, I am checking for the position of the page, and adjusting the bottom position of the floater appropriately. I also set the initial display:none, so you don't need to call .hide() in your initial script. In addition, resizing the window has the effect of scrolling for your use, so I changed the listener for both events.
$(document).on('scroll resize', function (e) {
var viewHeight = $(window).height();
var viewTop = $(window).scrollTop();
var footerTop = $("footer").offset().top;
var baseline = (viewHeight + viewTop) - footerTop;
var bu = $("#beamUp").css({bottom: (baseline < 0 ? 0 : baseline) + 'px'});
if (viewTop >= 50) {
bu.show(1000);
} else {
bu.hide(1000);
}
});
Reference is this page:
http://demo.mypreviewbetasite.com/laverona/menu.html
File in question: http://demo.mypreviewbetasite.com/laverona/scripts/menu.js
The page works as expected in Firefox and Chrome, where as the user scrolls, the position of the window is checked against the position of my sub-menu, so that before it gets scrolled out of view, its position is set to fixed.
However, in IE8, the window position never gets updated as the user scrolls. My testing has shown that IE gets through all the functions, but only updates the windowPos variable when the page loads.
What can be done so that this page behaves the same in IE as it does in FF and Chrome?
this is from jquery documentation:
"The .offset() method allows us to retrieve the current position of an element RELATIVE TO THE DOCUMENT."
I can't understand why FF or Chrome return $('html').offset().top relative to the client screen/ It seems that IE's approach is more predictable.
Try that (use .scrollTop property of the DOM element instead of .offset().top):
$(document).ready(function(e){
//alert("subPos: " + subPos);
//first find the position of the things to sticky
submenu = $("#sub");
//submenu.removeClass("no-js");
subPos = $("#sub").position();
subPos = subPos.top;
var preScrollHtml = document.getElementsByTagName('html').item(0).scrollTop;
var preScrollBody = document.getElementsByTagName('body').item(0).scrollTop;
var checkPos = function(){
var scrolledHtml = document.getElementsByTagName('html').item(0).scrollTop;
var scrolledBody = document.getElementsByTagName('body').item(0).scrollTop;
if (preScrollHtml !== scrolledHtml) {
windowPos = scrolledHtml;
}
else {
windowPos = scrolledBody;
}
preScrollHtml = scrolledHtml;
preScrollBody = scrolledBody;
calculate();
}
var calculate = function() {
subPos = 64;
if (windowPos >= subPos){
$("#sub").addClass("fixed");
$("#minestre").css("marginTop", "50px");
}
else if (windowPos < subPos){
$("#sub").removeClass("fixed");
$("#minestre").css("marginTop", "0px");
}
//Setting text fields to show the values of everything can help in debugging
$("#windowpos").val(windowPos);
$("#subp").val(subPos);
}
//every time the window scrolls, this function is run
if ($(window).scroll){
$(window).scroll(checkPos);
}
else if(window.onscroll){
window.onscroll = checkPos;
}
});
I know this is old, but for new people coming to this question, you may want to check out Andy's answer to a similar question (which also seems to solve this one): https://stackoverflow.com/a/11396681/1793128