I'm using a tiny library called '$.scrollTo' to animate a scroll to a div element in my html. at the top of my page I have a fixed navgation bar.
at the end of the animation, I would like to have that div focused (for accessibility). if my div is to large, at the end of the animation, the fact that it gets focus - simply sends it a bit off the screen.
This does not happen with small divs.
here is my code (check jsfiddle below):
$('#buttonid').on("click", function() {
//fixed nav bar height (to compensate when scrolling)
var fixed_navbar_height = $("#navbar-id").height();
//the element to scroll to
var $go_to_selector = $("#topic2");
$.scrollTo($go_to_selector, {
duration: 1000,
offset: -fixed_navbar_height,
onAfter: function() {
//if you comment out this .focus it works as intended.
$go_to_selector.focus();
}
});
});
here is a JSFIDDLE example:
https://jsfiddle.net/dy35obpq/3/
obviously the onAfter messes it up, but i would like both the animation and the focus. Any ideas on how to implement a focus on a large div without letting it change the scroll bar ? suggestions are more than welcome.
Try this.
onAfter: function() {
$go_to_selector.focus();
$(window).scrollTop($($go_to_selector).offset().top - fixed_navbar_height);
}
I have simply added this line in your onAfter callback.
$(window).scrollTop($($go_to_selector).offset().top - fixed_navbar_height);
and it seems to have fixed the problem while still retaining focus. You might want to use css to disable the focus blue highlight.
Related
I have a table sorter html page, the sample is here.
$('table').tablesorter({
theme: 'blue',
widgets: ['zebra', 'scroller'],
widgetOptions: {
scroller_height: 400
}
});
How can I make the bottom button visible even when the windows height is very small (say, can only show one or two rows)? Ideally scroller_height can be some type like $(window).height()/2 and it can automatically update when the window is resized.
The expected is that even when the window is small, the bottom button appears in the screen without scroll action.
If you want to make the scroller window dynamically adjust its height, there are two demos on the main wiki page under Widgets > Scroller.
http://jsfiddle.net/Mottie/txLp4xuk/2/
http://jsfiddle.net/Mottie/abkNM/8037/
Essentially, all you need to do is adjust the outer scroll window height
$('.tablesorter-scroller-table').css({
height: '',
'max-height': height + 'px'
});
Here is the demo you shared updated, and has a minimum height set to 100px.
I'd say that there are a few ways to achieve what you want, and one easy way is to:
create a function that checks the visibility of your table versus the viewport;
Code below:
function checkVisible() {
var bottom_of_table = $("#mytable").offset().top + $("#mytable").outerHeight();
var bottom_of_screen = $(window).scrollTop() + $(window).height();
if(bottom_of_screen > bottom_of_table){
$("#buttons-container").removeClass('bottom-fixed');
}
else {
$("#buttons-container").addClass('bottom-fixed');
}
}
If it exceeds the viewport, add a CSS class to your buttons container that fixes it to the bottom of the screen. Otherwise, remove this class and display the button container normally, at the bottom of the table.
You'd want to run this function-check on load and on window resize, as follows:
$(document).ready(function() {
checkVisible();
$(window).on('resize', checkVisible);
});
I've updated your fiddle: http://jsfiddle.net/12nt19vg/12/show/
Try resizing the window and let me know if this is the behavior you're looking for.
EDIT: Incorporating your additional spec in the comments, I've added an outer div to your buttons container and modified your CSS to visually create the effect that I think you're looking for.
Please take a look at this fiddle: http://jsfiddle.net/12nt19vg/27/show/
Introduction
I'm using Semantic-UI's sidebar functionality, which gives you a button that triggers a sidebar that pushes the content from the left (in this case).
I want to unfold that same sidebar by hovering with the mouse on the left side. I realize there are several ways to do it (as these often do. Maybe just checking the X position of the mouse would work but that's beside the point); I chose to create a transparent div on the left side and make its :hover pseudo-class to trigger the sidebar:
// create sidebar and attach to menu open
$('.ui.sidebar').sidebar('attach events', '.toc.item');
// hover transparent div to trigger the sidebar too:
$('.sidebar-trigger').hover(function() {
$('.ui.sidebar').sidebar('show')
});
// hide() and show() the sidebar accordingly to use the sidebar:
$('.ui.sidebar').sidebar('setting', {
onShow: function() {
$('.sidebar-trigger').hide();
},
onHidden: function() {
$('.sidebar-trigger').show();
}
});
Problem
Now, it all works except for one occasion: when you don't stop moving the mouse as the sidebar opens. I've looked at $(document).on('transitionend', function(event) { ... } and that mouse effectively prevents the transition to finish.
Resources
I've put a blue background on my .sidebar-trigger and made a small video/gif so as to be clearer.
I moved the mouse like a crazy creature but with natural gestures the problem occurs as well.
I'm using Semantic-UI's guide on this thing: http://semantic-ui.com/modules/sidebar.html#/settings (I've also tried onVisible and onHide with no luck)
This is a OSX Yosemite 10.10.3 running Chrome 45.0.2454.101 (64-bit)
jsfiddle with the problem at hand
PS: It seems it might be an OSX Chrome bug?
I would try using one and mouseover:
$('.sidebar-trigger').one('mouseover', function() {
$('.ui.sidebar').sidebar('show')
});
Then, when it has finished animating, reattach the event:
$(document).on('transitionend', function(event) {
$('.sidebar-trigger').one('mouseover', function() {
$('.ui.sidebar').sidebar('show')
});
});
I think what is happening is that the hover event is getting called multiple times - every time the element is hovered, then goes over a child element, and then goes back over the hover element, and things are getting mixed up at some point. So you need to only call show if it's not already shown.
Here is a working example: Fiddle
I believe when the element was hovered, it was adding a classes 'uncover' and 'visible', and another called 'animating' which wouldn't fire until the mouse stopped moving. I changed the jQuery slightly to only add classes 'uncover' and 'visible', and it still animated okay. However, the body was pushing right too far by 175px, so I had to edit the class that was causing that (noted below) from 260px to 85px. This DOES get the menu acting properly though from my understanding.
$('.sidebar-trigger').mouseenter(function() {
$('.ui.sidebar').addClass('uncover, visible');
$('body').addClass('mleft175');
});
$('body').click(function() {
$('.ui.sidebar').removeClass('uncover, visible');
$('body').removeClass('mleft175');
});
and then add overriding class
.ui.visible.left.sidebar ~ .pusher
{
-webkit-transform: translate3d(85px, 0, 0);
transform: translate3d(85px, 0, 0);
}
Right now it is set to hide the menu when the body is clicked. Alternatively you can hide it when the mouse leaves the sidebar menu:
$('.ui.sidebar').mouseleave(function(){
$(this).removeClass('uncover, visible')
});
Ok, my first answer was (of course) way too much work for what it really needed. The onVisible seems to work perfectly. Was that not working for you? Demo HERE
Simply change 'onShow' to 'onVisible' in your sidebar setting:
$('.ui.sidebar').sidebar('setting', {
onVisible: function() {
$('.sidebar-trigger').hide();
},
onHidden: function() {
$('.sidebar-trigger').show();
}
});
As shown on the Semantic UI site, the onVisible fires when the animating starts. The onShow fires when the animating finishes. So what you were doing was hiding that blue / transparent bar when the animation was finally done (the .animating class noted in my previous answer), as opposed to when it starts. If you need further explanation please let me know.
Recently here, I asked a question to stick a bar element always to bottom-left of the container. It seems not possible using just css. So, I ended up using javascript. Here is the Working Fiddle
Giving highlights of the previous question:
Stick the bar element to bottom-left of the container
The bar should be in bottom-left, even the container is scrolled vertically or horizontally.
The bar should come over the horizontal scrollbar, if the horizontal scrollbar is present.
The above fiddle works fine and obeys all above cases, even when the window is resized.
Now, I have the same situation but the container will get resized because of animation button click but not window resize.
Since, I am animating for one second, I am calling the same code present in the window resize function while I clicked on the animating button. But doing so is somehow breaking and isn't following the above rules/requirements.
Here is the Fiddle. (not working)
Please help.
PS: Here is the link to previous question. (if someone wants brief understanding)
Again, I solved it. I was making things complicated. Where there was need of only bottom property, I was using top and resetting it. Lots of unneccessary action in the code.
Here is the code, which is working fine.
$(function () {
$('.content').width($('body').width() - 50);
});
var stickToBottom = function (parent) {
var bar = parent.querySelector('.bar');
var top = bar.offsetTop;
parent.addEventListener('scroll', function (e) {
var el = e.currentTarget;
bar.style.bottom = -el.scrollTop + "px";
bar.style.left = el.scrollLeft + "px";
});
}
var parent = document.querySelector('.parent');
stickToBottom(parent);
$('.clickme').click(function () {
$(this).toggleClass('active');
});
Thanks to rlemon for giving a idea in javascript chat room.
Working Fiddle
I do not know how to solve this situation:
I`ve got the html/css looks like this:
Image showing how my css/html looks like and what is displayed on the screen after landing on page:
The when I scroll down I see green element:
scrolling down ->
After continuing to scrolling down I saw full green element and the if I scroll down I want to have this element like in css language: position fixed bottom 0. See image below:
I ve saw full element -> same link but image called problem3.png
and then I scroll below and I want to have it fixed at the bottom of the page, like on this image:
Fixed element on screen - What I want and I do not know how to do that -> same link but image called problem4.png (stupid spam prevention mechanism)
Is it possible to solve this situation ?
To sum up: I`ve got two divs, one above and second below, Wheen I scroll down I suddenly see another element (green div) and when i continue to scroll down I WANT TO HAVE THIS GREEN DIV FIXED AT THE BOTTOM OF THE PAGE.
Ofcourse, when I scroll up (back on the top) I want to "park" that green div at the top of the second div.
Is there any way to solve this situation with jQuery (Javascript) / html / css ?
Thank you in advance
I think you'll have to show some of your html structure. There are lots of ways to achieve this kind of effect. Fundamentally, in javascript terms you'll be looking to:
Add an event listener to the window scroll that checks whether the green element is fully in view
If it is in view, add a class (or change it's css) that fixes it's position where you want
Change your window scroll method so that it's checking the relative offset of the red div to the top of the screen. If it goes below the position where the green div should be fixed, remove the class you added earlier.
That sounds complicated, but it's not too bad. The javascript would be something like:
$(function() {
$(window).scroll(function() {
if($(".divToFix").hasClass("fixedAtBase")){
if(Utils.underView($(".redDiv"), $(".divToFix").height())) $(".divToFix").removeClass("fixedAtBase");
} else {
if(Utils.inView($(".divToFix"))) $(".divToFix").addClass("fixedAtBase");
}
});
});
Utils = {
underView: function(element, offset) {
return (($(window).height() + $(window).scrollTop() - offset) <= element.offset().top);
},
aboveView: function(element) {
return ($(window).scrollTop() >= element.offset().top + element.height());
},
inView: function(element) {
return (Utils.aboveView(element) !== true && Utils.underView(element, element.height()) !== true);
}
};
Bear in mind I've not tested that or anything.
edit - here's a demo
For a site I'm making for myself and a friend, I have a div container/wrapper with 2 other divs within it: one occupies the left half and has a black background and the other occupies the right with a white background. Essentially, this lets me get a split colored background. Each div holds half of a logo. Here's the page, temporarily hosted so you guys can see it.
http://djsbydesign.com/tempsite/index.htm
At any rate, I'd like to have links on the left and right hand sides of the page that, on click, cause their respective divs to expand from 50% to 100%. I have a few ideas, but am not sure entirely how to go about doing this (I'm rather new to javascript). The first would be to have the expanding div's z-index set to something higher than the non-expanding one, and then have it expand (somehow), and the other is to have the expanding div expand to 100% while the other shrinks to 0% at an equal rate.
The bottom line is, I have no idea how to go about doing this. I don't mind using mootools or jQuery, for the record.
The following seems to work:
$('#left-bg, #right-bg').click(
function(){
$(this).animate({'width': '100%'},600).siblings().animate({'width':'0'},600);
});
Albeit I'm not sure how you'd plan to bring back the the 'other' div.
JS Fiddle demo.
Edited to add a button (via jQuery) that allows both divs to be reverted to original dimensions:
$('#left-bg, #right-bg').click(
function(){
$(this).animate({'width': '100%'},600).siblings().animate({'width':'0'},600);
$('<button class="show">Show all</button>')
.appendTo('#wrapper');
});
$('.show').live('click',
function(){
$('#left-bg').animate(
{
'width': '50%'
},600);
$('#right-bg').animate(
{
'width': '50%'
},600);
$(this).remove();
});
Updated JS Fiddle.
Edited to address the question left by OP in the comments:
is there a way to have a page redirect after the animation completes?
Yep, just add the line window.location.href = "http://path.to.url.com/";
$('#left-bg, #right-bg').click(
function(){
$(this).animate({'width': '100%'},600).siblings().animate({'width':'0'},600);
$('<button class="show">Show all</button>')
.appendTo('#wrapper');
window.location.href = "http://www.google.com/" // <-- this line redirects.
});
$('.show').live('click',
function(){
$('#left-bg').animate(
{
'width': '50%'
},600);
$('#right-bg').animate(
{
'width': '50%'
},600);
$(this).remove();
});
Updated JS Fiddle.
Edited in response to bug report (in comments):
The one other bug (easy fix) is that any time you click on either of the divs, it creates a new button. So say you clicked on the left half, and it expanded and filled the page, etc., and then you clicked on it again (it being anywhere on the page now). It would attempt to add a second button.
To prevent a second button being added to the div just add an if:
$('#left-bg, #right-bg').click(
function(){
if (!$('.show').length) {
$(this).animate({'width': '100%'},600).siblings().animate({'width':'0'},600);
$('<button class="show">Show all</button>')
.appendTo('#wrapper');
window.location.href = "http://www.google.com/" // <-- this line redirects.
}
});
Which, will only append a button, or indeed animate the divs, so long as the $('.show') selector returns no matches.
However if you're also redirecting to another page by clicking the button it shouldn't be an issue anyway, since none of the jQuery on the original page will exectute/be able to access the page to which the user is redirected (unless it's a page on your own domain, and you've explicitly chosen to add the same button).
If you give absolute positions to your div's such that - 1st is positioned at top left corner and other is positioned at top right corner. And then in click event you can change the position of the other top corner of the div to be expanded.
You can use jquery to do this easily. Check jquery documentation for setting css.
Looks like you've got jQuery included, so use that! It's totes the easiest library to do simple animations with.
Here's an example click function that will slide the right background to be 100% like you said:
$('a#link').click(function(e) {
e.preventDefault();
$('#left-bg').animate({ width : '0%' }, 'slow');
$('#right-bg').animate({ width : '100%' }, 'slow');
});
Obviously to go in the other direction you'd switch the width values in the object passed to the animate functions.
If you're not familiar with the animate function, check the docs, but basically you just pass CSS rules in a key : value object to it, and it'll change the CSS values over time - animating it!
Hope this helps!