We've got a few pages using ajax to load in content and there's a few occasions where we need to deep link into a page. Instead of having a link to "Users" and telling people to click "settings" it's helpful to be able to link people to user.aspx#settings
To allow people to provide us with correct links to sections (for tech support, etc.) I've got it set up to automatically modify the hash in the URL whenever a button is clicked. The only issue of course is that when this happens, it also scrolls the page to this element.
Is there a way to disable this? Below is how I'm doing this so far.
$(function(){
//This emulates a click on the correct button on page load
if(document.location.hash){
$("#buttons li a").removeClass('selected');
s=$(document.location.hash).addClass('selected').attr("href").replace("javascript:","");
eval(s);
}
//Click a button to change the hash
$("#buttons li a").click(function(){
$("#buttons li a").removeClass('selected');
$(this).addClass('selected');
document.location.hash=$(this).attr("id")
//return false;
});
});
I had hoped the return false; would stop the page from scrolling - but it just makes the link not work at all. So that's just commented out for now so I can navigate.
Any ideas?
Use history.replaceState or history.pushState* to change the hash. This will not trigger the jump to the associated element.
Example
$(document).on('click', 'a[href^=#]', function(event) {
event.preventDefault();
history.pushState({}, '', this.href);
});
Demo on JSFiddle
* If you want history forward and backward support
History behaviour
If you are using history.pushState and you don't want page scrolling when the user uses the history buttons of the browser (forward/backward) check out the experimental scrollRestoration setting (Chrome 46+ only).
history.scrollRestoration = 'manual';
spec
info
Browser Support
replaceState
pushState
polyfill
Step 1: You need to defuse the node ID, until the hash has been set. This is done by removing the ID off the node while the hash is being set, and then adding it back on.
hash = hash.replace( /^#/, '' );
var node = $( '#' + hash );
if ( node.length ) {
node.attr( 'id', '' );
}
document.location.hash = hash;
if ( node.length ) {
node.attr( 'id', hash );
}
Step 2: Some browsers will trigger the scroll based on where the ID'd node was last seen so you need to help them a little. You need to add an extra div to the top of the viewport, set its ID to the hash, and then roll everything back:
hash = hash.replace( /^#/, '' );
var fx, node = $( '#' + hash );
if ( node.length ) {
node.attr( 'id', '' );
fx = $( '<div></div>' )
.css({
position:'absolute',
visibility:'hidden',
top: $(document).scrollTop() + 'px'
})
.attr( 'id', hash )
.appendTo( document.body );
}
document.location.hash = hash;
if ( node.length ) {
fx.remove();
node.attr( 'id', hash );
}
Step 3: Wrap it in a plugin and use that instead of writing to location.hash...
I think I may have found a fairly simple solution. The problem is that the hash in the URL is also an element on the page that you get scrolled to. if I just prepend some text to the hash, now it no longer references an existing element!
$(function(){
//This emulates a click on the correct button on page load
if(document.location.hash){
$("#buttons li a").removeClass('selected');
s=$(document.location.hash.replace("btn_","")).addClass('selected').attr("href").replace("javascript:","");
eval(s);
}
//Click a button to change the hash
$("#buttons li a").click(function(){
$("#buttons li a").removeClass('selected');
$(this).addClass('selected');
document.location.hash="btn_"+$(this).attr("id")
//return false;
});
});
Now the URL appears as page.aspx#btn_elementID which is not a real ID on the page. I just remove "btn_" and get the actual element ID
I was recently building a carousel which relies on window.location.hash to maintain state and made the discovery that Chrome and webkit browsers will force scrolling (even to a non visible target) with an awkward jerk when the window.onhashchange event is fired.
Even attempting to register a handler which stops propogation:
$(window).on("hashchange", function(e) {
e.stopPropogation();
e.preventDefault();
});
Did nothing to stop the default browser behavior.
The solution I found was using window.history.pushState to change the hash without triggering the undesirable side-effects.
$("#buttons li a").click(function(){
var $self, id, oldUrl;
$self = $(this);
id = $self.attr('id');
$self.siblings().removeClass('selected'); // Don't re-query the DOM!
$self.addClass('selected');
if (window.history.pushState) {
oldUrl = window.location.toString();
// Update the address bar
window.history.pushState({}, '', '#' + id);
// Trigger a custom event which mimics hashchange
$(window).trigger('my.hashchange', [window.location.toString(), oldUrl]);
} else {
// Fallback for the poors browsers which do not have pushState
window.location.hash = id;
}
// prevents the default action of clicking on a link.
return false;
});
You can then listen for both the normal hashchange event and my.hashchange:
$(window).on('hashchange my.hashchange', function(e, newUrl, oldUrl){
// #todo - do something awesome!
});
A snippet of your original code:
$("#buttons li a").click(function(){
$("#buttons li a").removeClass('selected');
$(this).addClass('selected');
document.location.hash=$(this).attr("id")
});
Change this to:
$("#buttons li a").click(function(e){
// need to pass in "e", which is the actual click event
e.preventDefault();
// the preventDefault() function ... prevents the default action.
$("#buttons li a").removeClass('selected');
$(this).addClass('selected');
document.location.hash=$(this).attr("id")
});
Okay, this is a rather old topic but I thought I'd chip in as the 'correct' answer doesn't work well with CSS.
This solution basically prevents the click event from moving the page so we can get the scroll position first. Then we manually add the hash and the browser automatically triggers a hashchange event. We capture the hashchange event and scroll back to the correct position. A callback separates and prevents your code causing a delay by keeping your hash hacking in one place.
var hashThis = function( $elem, callback ){
var scrollLocation;
$( $elem ).on( "click", function( event ){
event.preventDefault();
scrollLocation = $( window ).scrollTop();
window.location.hash = $( event.target ).attr('href').substr(1);
});
$( window ).on( "hashchange", function( event ){
$( window ).scrollTop( scrollLocation );
if( typeof callback === "function" ){
callback();
}
});
}
hashThis( $( ".myAnchor" ), function(){
// do something useful!
});
Adding this here because the more relevant questions have all been marked as duplicates pointing here…
My situation is simpler:
user clicks the link (a[href='#something'])
click handler does: e.preventDefault()
smoothscroll function: $("html,body").stop(true,true).animate({ "scrollTop": linkoffset.top }, scrollspeed, "swing" );
then window.location = link;
This way, the scroll occurs, and there's no jump when the location is updated.
Erm I have a somewhat crude but definitely working method.
Just store the current scroll position in a temp variable and then reset it after changing the hash. :)
So for the original example:
$("#buttons li a").click(function(){
$("#buttons li a").removeClass('selected');
$(this).addClass('selected');
var scrollPos = $(document).scrollTop();
document.location.hash=$(this).attr("id")
$(document).scrollTop(scrollPos);
});
I don't think this is possible. As far as I know, the only time a browser doesn't scroll to a changed document.location.hash is if the hash doesn't exist within the page.
This article isn't directly related to your question, but it discusses typical browser behavior of changing document.location.hash
if you use hashchange event with hash parser, you can prevent default action on links and change location.hash adding one character to have difference with id property of an element
$('a[href^=#]').on('click', function(e){
e.preventDefault();
location.hash = $(this).attr('href')+'/';
});
$(window).on('hashchange', function(){
var a = /^#?chapter(\d+)-section(\d+)\/?$/i.exec(location.hash);
});
Save scroll position before changing url fragment.
Change url fragment.
Restore old scroll position.
let oldScrollPosition = window.scrollY;
window.location.hash = addressFragment;
window.scrollTo(0, oldScrollPosition);
It's fast, so client won't notice anything.
The other way to do this is to add a div that's hidden at the top of the viewport. This div is then assigned the id of the hash before the hash is added to the url....so then you don't get a scroll.
Here's my solution for history-enabled tabs:
var tabContainer = $(".tabs"),
tabsContent = tabContainer.find(".tabsection").hide(),
tabNav = $(".tab-nav"), tabs = tabNav.find("a").on("click", function (e) {
e.preventDefault();
var href = this.href.split("#")[1]; //mydiv
var target = "#" + href; //#myDiv
tabs.each(function() {
$(this)[0].className = ""; //reset class names
});
tabsContent.hide();
$(this).addClass("active");
var $target = $(target).show();
if ($target.length === 0) {
console.log("Could not find associated tab content for " + target);
}
$target.removeAttr("id");
// TODO: You could add smooth scroll to element
document.location.hash = target;
$target.attr("id", href);
return false;
});
And to show the last-selected tab:
var currentHashURL = document.location.hash;
if (currentHashURL != "") { //a tab was set in hash earlier
// show selected
$(currentHashURL).show();
}
else { //default to show first tab
tabsContent.first().show();
}
// Now set the tab to active
tabs.filter("[href*='" + currentHashURL + "']").addClass("active");
Note the *= on the filter call. This is a jQuery-specific thing, and without it, your history-enabled tabs will fail.
This solution creates a div at the actual scrollTop and removes it after changing hash:
$('#menu a').on('click',function(){
//your anchor event here
var href = $(this).attr('href');
window.location.hash = href;
if(window.location.hash == href)return false;
var $jumpTo = $('body').find(href);
$('body').append(
$('<div>')
.attr('id',$jumpTo.attr('id'))
.addClass('fakeDivForHash')
.data('realElementForHash',$jumpTo.removeAttr('id'))
.css({'position':'absolute','top':$(window).scrollTop()})
);
window.location.hash = href;
});
$(window).on('hashchange', function(){
var $fakeDiv = $('.fakeDivForHash');
if(!$fakeDiv.length)return true;
$fakeDiv.data('realElementForHash').attr('id',$fakeDiv.attr('id'));
$fakeDiv.remove();
});
optional, triggering anchor event at page load:
$('#menu a[href='+window.location.hash+']').click();
I have a simpler method that works for me. Basically, remember what the hash actually is in HTML. It's an anchor link to a Name tag. That's why it scrolls...the browser is attempting to scroll to an anchor link. So, give it one!
Right under the BODY tag, put your version of this:
<a name="home"></a><a name="firstsection"></a><a name="secondsection"></a><a name="thirdsection"></a>
Name your section divs with classes instead of IDs.
In your processing code, strip off the hash mark and replace with a dot:
var trimPanel = loadhash.substring(1); //lose the hash
var dotSelect = '.' + trimPanel; //replace hash with dot
$(dotSelect).addClass("activepanel").show(); //show the div associated with the hash.
Finally, remove element.preventDefault or return: false and allow the nav to happen. The window will stay at the top, the hash will be appended to the address bar url, and the correct panel will open.
I think you need to reset scroll to its position before hashchange.
$(function(){
//This emulates a click on the correct button on page load
if(document.location.hash) {
$("#buttons li a").removeClass('selected');
s=$(document.location.hash).addClass('selected').attr("href").replace("javascript:","");
eval(s);
}
//Click a button to change the hash
$("#buttons li a").click(function() {
var scrollLocation = $(window).scrollTop();
$("#buttons li a").removeClass('selected');
$(this).addClass('selected');
document.location.hash = $(this).attr("id");
$(window).scrollTop( scrollLocation );
});
});
If on your page you use id as sort of an anchor point, and you have scenarios where you want to have users to append #something to the end of the url and have the page scroll to that #something section by using your own defined animated javascript function, hashchange event listener will not be able to do that.
If you simply put a debugger immediate after hashchange event, for example, something like this(well, I use jquery, but you get the point):
$(window).on('hashchange', function(){debugger});
You will notice that as soon as you change your url and hit the enter button, the page stops at the corresponding section immediately, only after that, your own defined scrolling function will get triggered, and it sort of scrolls to that section, which looks very bad.
My suggestion is:
do not use id as your anchor point to the section you want to scroll to.
If you must use ID, like I do. Use 'popstate' event listener instead, it will not automatically scroll to the very section you append to the url, instead, you can call your own defined function inside the popstate event.
$(window).on('popstate', function(){myscrollfunction()});
Finally you need to do a bit trick in your own defined scrolling function:
let hash = window.location.hash.replace(/^#/, '');
let node = $('#' + hash);
if (node.length) {
node.attr('id', '');
}
if (node.length) {
node.attr('id', hash);
}
delete id on your tag and reset it.
This should do the trick.
This worked for me using replaceState:
$('a[href^="#"]').click(function(){
history.replaceState({}, '', location.toString().replace(/#.*$/, '') + $(this).attr('href'));
});
Only add this code into jQuery on document ready
Ref : http://css-tricks.com/snippets/jquery/smooth-scrolling/
$(function() {
$('a[href*=#]:not([href=#])').click(function() {
if (location.pathname.replace(/^\//,'') == this.pathname.replace(/^\//,'') && location.hostname == this.hostname) {
var target = $(this.hash);
target = target.length ? target : $('[name=' + this.hash.slice(1) +']');
if (target.length) {
$('html,body').animate({
scrollTop: target.offset().top
}, 1000);
return false;
}
}
});
});
Related
I have this JS which works but then it starts to scroll before the page completes loading. Is there a way to check page loading and then load for that smooth effect?
jQuery(document).ready(function(){
var href = window.location.href+'#team';
var splitit = (href.split('#'))[1];
if(splitit !== "" || splitit !== "undefined"){
jQuery('html, body').animate({
scrollTop: jQuery('#'+splitit).offset().top - 50
}, 2000);
}
});
Also, what does splitit do? Can we remove it?
The split() method is used to split a string into an array of substrings, and returns the new array.
var str = "How are you doing today?";
var res = str.split(" ");
//result is array [How,are,you,doing,today?]
Remove for what?
Splitit needed for checking is in url '#'-symbol or not empty url after '#'.
Try load event that runs when the page is fully loaded including graphics.
jQuery( window ).load(function() {
// Run code
});
For this functionality, you can utilize modern browsers css:
html {
scroll-behavior: smooth;
}
but I recommend this approach: call smoothScroll() in document.ready
function smoothScroll(){
// this part will add ID's to the named anchor tags
// please name tags names not to interfere with other elements id's but
// also will look good in addressbar, as : #ListOfFeaturedProductsSection
$("a").each(function(){
var t=this;
if (t.name!=="" && t.id==""){
t.id=t.name;
}
});
// Add smooth scrolling to all links
$("a").on('click', function(event) {
// Make sure this.hash has a value before overriding default behavior
if (this.hash !== "") {
// Prevent default anchor click behavior
var hash = this.hash;
if (hash) {
event.preventDefault();
// Using jQuery's animate() method to add smooth page scroll
// The optional number (800) specifies the number of milliseconds it takes to scroll to the specified area
$('html, body').animate({
scrollTop: $(hash).offset().top
}, 800, function(){
// Add hash (#) to URL when done scrolling (default click behavior)
window.location.hash = hash;
});
}
}
});
}
splitit is the id attribute of the target to what the page should be scrolled.
Actually it is not so obviously how to check that all resources are loaded, but you can put this jquery code in the end of your page before , i think, it helps you partly.
I am using the collapsing header described here http://codepen.io/cbracco/pen/corFl
I'd like to enhance it with the following feature:
When the user has scrolled the content area all over the header I'd like to display a "reset" button that pushes the content area back to its initial position and reveals the header fully again.
I guess at least for the reset, I'd have to use javascript (or the CSS checkbox trick maybe?). Could the "reset" button made visible purely by using CSS or would I have to use window.onScroll to detect scrolling of the content area and display the button myself via javascript?
You can create an element with an id at the top of the page (i.e. <span id="top">), and then use Javascript to scroll to that element.
button.addEventListener('click', function() {
window.location.hash = "#top";
});
See this SO question.
Scroll to top can easily be done without javascript:
<div id="top">lorem ipsum</a>
go to top
http://codepen.io/anon/pen/PZBXyg
If you however want to smoothly scroll to the top, then I'd suggest to use this neat little snippet of jquery:
$('#top').click(function() {
if (location.pathname.replace(/^\//, '') == this.pathname.replace(/^\//, '') && location.hostname == this.hostname) {
var target = $(this.hash);
history.pushState({}, '', target.selector);
target = target.length ? target : $('[name=' + this.hash.slice(1) + ']');
if (target.length) {
$('html,body').animate({
scrollTop: target.offset().top
}, 1000);
return false;
}
}
});
http://codepen.io/anon/pen/xZJmyP
To reveal the "reset" button based on how much the user has scrolled, you might want to utilize the window.onscroll listener and then check the scrollTop value
With native javascript:
window.onscroll = function(){
console.log(document.body.scrollTop)
}
With jQuery
$(window).scroll(function (event) {
console.log($(window).scrollTop());
});
I have a page divided to a section. It works perfectly except one thing, script scroll page to specific section but If I will hit more than one link it will send me to every clicked link one after one.
jQuery(window).bind("load", function () {
var hash = window.location.hash;
hash = hash.replace("#", "");
var elem = jQuery(".pb-line-css-group-" + hash);
menu_scroll_to(elem);
});
jQuery(document).ready(function () {
jQuery(".menu-item A").click(function () {
var hash = jQuery(this).attr('href');
hash = hash.replace("#", "");
hash = hash.replace("/", "");
var elem = jQuery(".pb-line-css-group-" + hash);
menu_scroll_to(elem);
});
});
function menu_scroll_to(elem) {
if (elem) {
jQuery('html, body').animate({
scrollTop: elem.offset().top - 70
}, 2000, "easeOutQuint");
}
}
I want to scroll to only first clicked link and if I will hit another link during the scroll in will not scroll to those location
I think you need a special flag, e.g. 'window.scrolling', set it to true before scrolling and to false in callback after scrolling. When user will try to click links it will nothing do while first one is working.
I can't seem to get this functioning the way that I want. I want a user to click a link, in this case Learn More then open a tab and scroll down the page to where that tab is. I have the functionality of opening the tab working but it will not scroll. The only time I can get it to actually scroll is to copy:
jQuery(document).scrollTop( jQuery("#" + descriptionID).offset().top );
into chrome's console and activate it. Below is the code in its entirety:
jQuery(document).on("click", ".learnMore", function() {
description = jQuery("a.ui-tabs-anchor:contains('Description')").parent().index();
descriptionID = jQuery("a.ui-tabs-anchor:contains('Description')").attr('id');
jQuery(".ui-widget").tabs("option", "active", description);
jQuery(document).scrollTop( jQuery("#" + descriptionID).offset().top );
});
Here is a link to a fiddle
It's because when you click the link, it's triggering the hash change. Because there is no anchor to go to, it scrolls to top after you call scrollTop. Adding return false; to the end of your click event or adding e.preventDefault(); for more modern browsers should correct the issue.
http://jsfiddle.net/jmarikle/dL41forj/
jQuery(document).on("click", ".learnMore", function() {
...
return false;
});
or
jQuery(document).on("click", ".learnMore", function(e) {
e.preventDefault();
...
});
Setting a timeout and targeting the body also works: http://jsfiddle.net/o2whkLyu/1/
$(document).on("click", ".learnMore", function() {
description = jQuery("a.ui-tabs-anchor:contains('Description')").parent().index();
descriptionID = jQuery("a.ui-tabs-anchor:contains('Description')").attr('id');
jQuery(".ui-widget").tabs("option", "active", description);
setTimeout (function(){
$('body').scrollTop( $("#" + descriptionID).offset().top );}, 20);
});
I have the following code:
<li class="shop-currencies">
€
£
$
R
</li>
When an item is clicked I want to set the class to the clicked item and get the ID of the item clicked. This is what I have so far:
$('.shop-currencies').click(function() {
var id = $(this).attr('id');
alert(id);
/**
* Remove the classes from the currency elements
*/
$('.shop-currencies').find('a').each(function(e) {
$(this).removeClass();
});
/**
* Set the class of the clicked element
*/
$( '#' + id).addClass('current');
});
The ID is being returned as 'undefined' How do I get the ID of the clicked link?
Thanks
You need to attach click handler to child anchor element :
$('.shop-currencies a').click(function() {
var id = $(this).attr('id');
alert(id);
/**
* Remove the classes from the currency elements
*/
$('.shop-currencies').find('a').not(this).removeClass('smclass')
/**
* Add class to current elements
*/
$(this).addClass('smclass')
});
There are a couple of options, Milind Anantwar has one, the other is to use the originally clicked element, which is passed to the event as a target property on the event argument. You can also simplify your code a lot. Please note that your bookmark anchors will cause the page to spring to the top, so also add e.preventDefault(); to any solution you choose:
$('.shop-currencies').click(function(e) {
e.preventDefault();
$('a', this).removeClass('current'); // remove related anchor current class
$(e.target).addClass('current');
});
JSFiddle: http://jsfiddle.net/TrueBlueAussie/5Lsuazvt/
The one downside to this is that clicking inside .shop-currencies, but not on a currency link, will clear the current selection. Because of this you are better off targetting the links instead:
$('.shop-currencies a').click(function(e) {
e.preventDefault();
$(this).siblings().removeClass('current'); // remove related anchor current class
$(this).addClass('current');
});
JSFiddle: http://jsfiddle.net/TrueBlueAussie/5Lsuazvt/1/
Which can be reduced to one line:
$('.shop-currencies a').click(function(e) {
e.preventDefault();
$(this).addClass('current').siblings().removeClass('current');
});
JSFiddle: http://jsfiddle.net/TrueBlueAussie/5Lsuazvt/2/
Saving the best for last
And one last point... It is more efficient (but hardly noticeable) to add a single delegated event handler, instead of attaching 4 seperate handlers:
$('.shop-currencies').on('click', 'a', function(e) {
e.preventDefault();
$(this).addClass('current').siblings().removeClass('current');
});
JSFiddle: http://jsfiddle.net/TrueBlueAussie/5Lsuazvt/3/
Final thoughts:
The IDs on the links are unnecessary if you have an appropriate this available. You can remove them from the HTML. You have the currency value you require in data-currency attributes, so you could use it like this:
$('.shop-currencies').on('click', 'a', function(e) {
e.preventDefault();
$(this).addClass('current').siblings().removeClass('current');
alert($(this).data('currency'));
});
JSFiddle: http://jsfiddle.net/TrueBlueAussie/5Lsuazvt/7/
your click, is attach to li instead of each a tag
so do $('a').click();instead
Shortest and fastest answer
$('.shop-currencies > a').click(function(){
$(this).siblings('a').removeClass('current');
$(this).addClass('current');
});
The code pen link is here, you can play with the code your self
$('.shop-currencies a').each(function() {
$(this).on("click", function(event) {
event.preventDefault();
var id = $(this).attr('id');
$('.shop-currencies a').removeClass("current");
$(this).addClass('current');
alert(id);
});
});
http://jsfiddle.net/nj37g5rm/8/