I'm working on a project that animate on page scroll.
This is the element I want to animate.
<h1 style="position: relative; top: 0; left: 0;"
onscroll="animateAfterPosition(200)"
data-animate-left="50px" data-animate-top="50px"
data-animate-time="0.2s">Animation on scroll</h1>
This is my JavaScript
function animateAfterPosition(scroll) {
console.log(scroll);
function(){
if (window.scrollY <= scroll) {
this.classList.add('animateAfterPosition');
} else {
this.classList.remove('animateAfterPosition');
}}
And this is my CSS
.animateAfterPosition {
transition: attr(data-animate-time);
left: attr(data-animate-left);
top: attr(data-animate-top);}
I need to run the function animateAfterPosition from the html. I expected to run the function with onscroll event, but it doesn't work. So how can I do this?
Edit
I found that css attr() is only working with the content: property and I managed to do it with JavaScript
You need to add selector to toggle class the animation. And your current css doesn't have enough height to make scrolling window. Here's an simple snippet to run your function onload, update onscroll and toggling class.
var dataAnimate = document.querySelector('[data-animate]');
function animateAfterPosition(scroll) {
dataAnimate.classList.toggle('active', window.scrollY <= scroll);
}
window.addEventListener("scroll", function() {
return animateAfterPosition(200);
});
.animateAfterPosition {
transition: attr(data-animate-time);
left: attr(data-animate-left);
top: attr(data-animate-top);
}
[data-animate] {
height: 1000px;
}
<body onload="animateAfterPosition(200)">
<h1 style="position: relative; top: 0; left: 0;"data-animate-left="50px" data-animate-top="50px" data-animate-time="0.2s" data-animate>Animation on scroll</h1>
</body>
Fiddle: https://jsfiddle.net/rafonzoo/phmg0u46/
A minimalistic solution
You can configure it using the first 4 variables in the function. I recommend adding the indicator class to the body itself and then use a selector like body.beyond-that-point h1. This way, it's possible to make several tags behave differently as the scrolling happens.
You can test it here
This version uses a fancier effect but the logic behind is the same.
https://deneskellner.com/stackoverflow-examples/62623588/index.html
<!doctype html>
<html>
<style>
body.beyond-that-point {background:silver;}
div.text {padding:75vh 0px;text-align:center;}
</style>
<body>
<div class="text">
Scroll me down and the background will change
</div>
<script>
setTimeout(function() {
var amount = 100; // how many pixels before the miracle happens
var beyondClass = 'beyond-that-point'; // this class will be added
var targetSelector = 'body'; // which element to add the class to
var checkMS = 20; // check scroll position every N milliseconds
var eClass = document.querySelector(targetSelector).classList;
setInterval(function() {
var y = window.scrollY;
var c = beyondClass;
var isBeyond = !!(y>=amount)?1:0;
if(isBeyond==1) if(!eClass.contains(c)) eClass.add(c);
if(isBeyond==0) if( eClass.contains(c)) eClass.remove(c);
},checkMS);
},1);
</script>
</body>
</html>
Note: there are better ways to check DOM readiness but for simplicity I used setTimeout here. Feel free to change it.
I tried to disable the graph by not allowing the cells on graph with follow code.
graph.setCellsSelectable(false);
but it is not working, still can select cell, (only disabled resizing)
And for the toolbar to be disabled, I tried to remove or replace ondrag event, is that correct? In theory I think mxgraph has their own event handler for dragging of toolbar item.
mx_toolbar.appendChild(
mxUtils.button("Disable/Enable", function() {
document.querySelectorAll('.toolbar > button').addEventListener(function (e) {
e.preventDefault()
return false;
});
}
)
Hope your help. I dont mind as long as it is working solution.
Thanks
Instead of removing or modifying the event handler, you can simply overlay the area you want to disable along with css.
var toolbarContainer = document.querySelector(".toolbar");
var overlay = document.querySelector(".toolbar-overlay")
if (!overlay) {
overlay = document.createElement('div')
overlay.className = 'toolbar-overlay'
toolbarContainer.appendChild(overlay)
} else {
overlay.parentNode.removeChild(overlay)
}
Here is css for the overlay div
.toolbar-overlay {
position: absolute;
top: 0;
height: 100%;
width: 100%;
opacity: 0.4;
background: #e1e1e1;
}
Note: You should make sure the parent div of the overlay div must positioned as relative to make this css working!
I want to avoid jQuery so I can get a better feel for Javascript. For now I have a Codepen set up that displays a large majority of my first project. I know the code is probably sloppy and I am a beginner. I simply want to get the JS working with my navbar completely disappearing onScroll then I will optimize it from there. Thanks!
I have searched youtube, google, SO but everyone seems to use jQuery.
https://codepen.io/dev20tx/pen/wbKyJq
The CSS:
.nav {
border-bottom: 1px solid #EAEAEB;
text-align: right;
height: 70px;
line-height: 70px;
position: fixed;
top: 0;
left: 0;
width: 100%;
background-color: white;
opacity: 0.8;
z-index: 2;
}
And the Javascript:
window.onscroll = function() {navFunction()};
function navFunction() {
if (document.body.scrollTop > 50 ||
document.documentElement.scrollTop > 50) {
document.queryselector(".nav").className = "test";
} else {
document.queryselector(".nav").className = "";
}
}
Disappearing navbar.
I've updated the codepen at https://codepen.io/anon/pen/rgOdXy
Following is the updated JavaScript code, first problem was that you was attaching event listener to window, instead of the element which is to be scrolled and second mistake was the spelling mistake of querySelector method
function navFunction(e) {
if (e.target.scrollTop > 50 || document.documentElement.scrollTop > 50) {
document.querySelector(".nav").className = "nav test";
} else {
document.querySelector(".nav").className = "nav";
}
}
document.querySelector(".container").addEventListener("scroll",navFunction);
Allright, so, few things.
First, queryselector should be querySelector (with a capital S). Also note that setting the .nav's className to "test" or "" will remove the "nav" class from that element.
Second, you should make sure you attach the onscroll event after the page has loaded.
Lastly, you're attaching the onscroll event to the window, but you actually want to attach it to the .container element, as that's the element you're scrolling.
I'm not just throwing the entire solution in your lap, as you seem to want to play around yourself a little bit. If you do want a more elaborate answer, don't hesitate to ask.
I have an animation triggered by a scroll event, which makes a menu slide out of view. There is also a button that when clicked brings the menu back into view.
Because the menu can be closed by scrolling, when the user clicks the button to bring the menu in, if they scroll during this period of the animation, the menu disappears again without the animation completing.
I have put together a simplified version of the animation here http://codepen.io/emilychews/pen/evbzMQ
I need to temporarily prevent the scroll function working after the button is clicked, which I'm assuming would be best done with the setTimeout() method on the click function? I've tried a number of things but can't seem to solve it/ get it to work.
Any help would be awesome. For quick reference as well the code is below
JQUERY
jQuery(document).ready(function($){
// slide menu to left on scroll
function hideOnScroll() {
$(window).scroll(function() {
if ( $(document).scrollTop() > 1) {
$('.menubox').css('left', '-25%');
}
});
}
hideOnScroll(); // call hideOnScroll function
// click handler to bring menu back in
$('.mybutton').on('click', function() {
$('.menubox').css('left', '0%');
var scrollPause = setTimeout(hideOnScroll, 2000) // temporarily pause hideOnScroll function
});
}); //end of jQuery
CSS
body {
margin: 0;
padding: 0;
height: 200vh;}
.menubox {
top: 100;
position: fixed;
width: 20%;
height: 100%;
background: red;
padding: 10px;
color: white;
transition: all 2s;
}
.mybutton {
position: fixed;
left: 40%;
top: 50px;
padding: 5px 10px;
}
HTML
<div class="menubox">Menu Box</div>
<button class="mybutton">Click to bring back menu</button>
** Also please note I've simplified the animation for the sake of the forum, the actual animation function contains Greensock code, but I didn't want to include this in case it confused the issue. I can't therefore just use the .addClass() and .removeClass() or have a workaround that changes the given CSS or scrollTop() values. I need to disable the hideOnScroll() function when the button is clicked for the duration of the click invoked animation - which in the examples is 2s. Thus I think the only way to achieve this is with the setTimeOut() method (i may be wrong on this). But I can't get it to work.
Many thanks
Emily
you can simply check the offset is complete.
function hideOnScroll() {
$(window).scroll(function() {
if ( $(document).scrollTop() > 1) {
if( $('.menubox').offset().left == 0 ){
$('.menubox').css('left', '-25%');
}
});
}
http://codepen.io/anon/pen/aJXGbr
I have made a few changes in your javascript. Have a look
var animating = false;
$(document).ready(function(){
function hideOnScroll() {
$(window).scroll(function() {
event.preventDefault();
if ( $(document).scrollTop() > 1 && !animating){
console.log("Hiding")
animating = true;
$('.menubox').animate({'left': '-25%'},2000,function(){
animating = false;
});
}
});
}
hideOnScroll();
$('.mybutton').click(function() {
var pos = $(window).scrollTop();
animating = true;
$('.menubox').animate({'left':'0%'},2000,function(){
console.log("Finished Opening");
animating = false;
});
console.log("Animating Open");
var siId = setInterval(function(){
if(animating){
console.log("Preventing Window Scrolling.");
$(window).scrollTop(pos);
}
else{
console.log("Stopping setInterval");
animating = false;
clearInterval(siId);
}
},0);
});
});
This will stop your browser window from scrolling until your Menu Open Animation is finished.
Also I have removed the transitionproperty from style.
Tested in Google Chrome.
Kindly inform me if i have misinterpreted your question.
Is it possible to set the cursor to 'wait' on the entire html page in a simple way? The idea is to show the user that something is going on while an ajax call is being completed. The code below shows a simplified version of what I tried and also demonstrate the problems I run into:
if an element (#id1) has a cursor style set it will ignore the one set on body (obviously)
some elements have a default cursor style (a) and will not show the wait cursor on hover
the body element has a certain height depending on the content and if the page is short, the cursor will not show below the footer
The test:
<html>
<head>
<style type="text/css">
#id1 {
background-color: #06f;
cursor: pointer;
}
#id2 {
background-color: #f60;
}
</style>
</head>
<body>
<div id="id1">cursor: pointer</div>
<div id="id2">no cursor</div>
Do something
</body>
</html>
Later edit...
It worked in firefox and IE with:
div#mask { display: none; cursor: wait; z-index: 9999;
position: absolute; top: 0; left: 0; height: 100%;
width: 100%; background-color: #fff; opacity: 0; filter: alpha(opacity = 0);}
<a href="#" onclick="document.getElementById('mask').style.display = 'block'; return false">
Do something</a>
The problem with (or feature of) this solution is that it will prevent clicks because of the overlapping div (thanks Kibbee)
Later later edit...
A simpler solution from Dorward:
.wait, .wait * { cursor: wait !important; }
and then
Do something
This solution only shows the wait cursor but allows clicks.
If you use this slightly modified version of the CSS you posted from Dorward,
html.wait, html.wait * { cursor: wait !important; }
you can then add some really simple jQuery to work for all ajax calls:
$(document).ready(function () {
$(document).ajaxStart(function () { $("html").addClass("wait"); });
$(document).ajaxStop(function () { $("html").removeClass("wait"); });
});
or, for older jQuery versions (before 1.9):
$(document).ready(function () {
$("html").ajaxStart(function () { $(this).addClass("wait"); });
$("html").ajaxStop(function () { $(this).removeClass("wait"); });
});
I understand you may not have control over this, but you might instead go for a "masking" div that covers the entire body with a z-index higher than 1. The center part of the div could contain a loading message if you like.
Then, you can set the cursor to wait on the div and don't have to worry about links as they are "under" your masking div. Here's some example CSS for the "masking div":
body { height: 100%; }
div#mask { cursor: wait; z-index: 999; height: 100%; width: 100%; }
This seems to work in firefox
<style>
*{ cursor: inherit;}
body{ cursor: wait;}
</style>
The * part ensures that the cursor doesn't change when you hover over a link. Although links will still be clickable.
I have been struggling with this problem for hours today.
Basically everything was working just fine in FireFox but (of course) not in IE.
In IE the wait cursor was showing AFTER the time consuming function was executed.
I finally found the trick on this site:
http://www.codingforums.com/archive/index.php/t-37185.html
Code:
//...
document.body.style.cursor = 'wait';
setTimeout(this.SomeLongFunction, 1);
//setTimeout syntax when calling a function with parameters
//setTimeout(function() {MyClass.SomeLongFunction(someParam);}, 1);
//no () after function name this is a function ref not a function call
setTimeout(this.SetDefaultCursor, 1);
...
function SetDefaultCursor() {document.body.style.cursor = 'default';}
function SomeLongFunction(someParam) {...}
My code runs in a JavaScript class hence the this and MyClass (MyClass is a singleton).
I had the same problems when trying to display a div as described on this page. In IE it was showing after the function had been executed. So I guess this trick would solve that problem too.
Thanks a zillion time to glenngv the author of the post. You really made my day!!!
Easiest way I know is using JQuery like this:
$('*').css('cursor','wait');
css: .waiting * { cursor: 'wait' }
jQuery: $('body').toggleClass('waiting');
Why don't you just use one of those fancy loading graphics (eg: http://ajaxload.info/)? The waiting cursor is for the browser itself - so whenever it appears it has something to do with the browser and not with the page.
To set the cursor from JavaScript for the whole window, use:
document.documentElement.style.cursor = 'wait';
From CSS:
html { cursor: wait; }
Add further logic as needed.
Try the css:
html.waiting {
cursor: wait;
}
It seems that if the property body is used as apposed to html it doesn't show the wait cursor over the whole page. Furthermore if you use a css class you can easily control when it actually shows it.
Here is a more elaborate solution that does not require external CSS:
function changeCursor(elem, cursor, decendents) {
if (!elem) elem=$('body');
// remove all classes starting with changeCursor-
elem.removeClass (function (index, css) {
return (css.match (/(^|\s)changeCursor-\S+/g) || []).join(' ');
});
if (!cursor) return;
if (typeof decendents==='undefined' || decendents===null) decendents=true;
let cname;
if (decendents) {
cname='changeCursor-Dec-'+cursor;
if ($('style:contains("'+cname+'")').length < 1) $('<style>').text('.'+cname+' , .'+cname+' * { cursor: '+cursor+' !important; }').appendTo('head');
} else {
cname='changeCursor-'+cursor;
if ($('style:contains("'+cname+'")').length < 1) $('<style>').text('.'+cname+' { cursor: '+cursor+' !important; }').appendTo('head');
}
elem.addClass(cname);
}
with this you can do:
changeCursor(, 'wait'); // wait cursor on all decendents of body
changeCursor($('#id'), 'wait', false); // wait cursor on elem with id only
changeCursor(); // remove changed cursor from body
I used a adaptation of Eric Wendelin's solution. It will show a transparent, animated overlay wait-div over the whole body, the click will be blocked by the wait-div while visible:
css:
div#waitMask {
z-index: 999;
position: absolute;
top: 0;
right: 0;
height: 100%;
width: 100%;
cursor: wait;
background-color: #000;
opacity: 0;
transition-duration: 0.5s;
-webkit-transition-duration: 0.5s;
}
js:
// to show it
$("#waitMask").show();
$("#waitMask").css("opacity"); // must read it first
$("#waitMask").css("opacity", "0.8");
...
// to hide it
$("#waitMask").css("opacity", "0");
setTimeout(function() {
$("#waitMask").hide();
}, 500) // wait for animation to end
html:
<body>
<div id="waitMask" style="display:none;"> </div>
... rest of html ...
My Two pence:
Step 1:
Declare an array. This will be used to store the original cursors that were assigned:
var vArrOriginalCursors = new Array(2);
Step 2:
Implement the function cursorModifyEntirePage
function CursorModifyEntirePage(CursorType){
var elements = document.body.getElementsByTagName('*');
alert("These are the elements found:" + elements.length);
let lclCntr = 0;
vArrOriginalCursors.length = elements.length;
for(lclCntr = 0; lclCntr < elements.length; lclCntr++){
vArrOriginalCursors[lclCntr] = elements[lclCntr].style.cursor;
elements[lclCntr].style.cursor = CursorType;
}
}
What it does:
Gets all the elements on the page. Stores the original cursors assigned to them in the array declared in step 1. Modifies the cursors to the desired cursor as passed by parameter CursorType
Step 3:
Restore the cursors on the page
function CursorRestoreEntirePage(){
let lclCntr = 0;
var elements = document.body.getElementsByTagName('*');
for(lclCntr = 0; lclCntr < elements.length; lclCntr++){
elements[lclCntr].style.cursor = vArrOriginalCursors[lclCntr];
}
}
I have run this in an application and it works fine.
Only caveat is that I have not tested it when you are dynamically adding the elements.
BlockUI is the answer for everything. Give it a try.
http://www.malsup.com/jquery/block/
This pure JavaScript seems to work pretty well ... tested on FireFox, Chrome, and Edge browsers.
I'm not sure about the performance of this if you had an overabundance of elements on your page and a slow computer ... try it and see.
Set cursor for all elements to wait:
Object.values(document.querySelectorAll('*')).forEach(element => element.style.cursor = "wait");
Set cursor for all elements back to default:
Object.values(document.querySelectorAll('*')).forEach(element => element.style.cursor = "default");
An alternative (and perhaps a bit more readable) version would be to create a setCursor function as follows:
function setCursor(cursor)
{
var x = document.querySelectorAll("*");
for (var i = 0; i < x.length; i++)
{
x[i].style.cursor = cursor;
}
}
and then call
setCursor("wait");
and
setCursor("default");
to set the wait cursor and default cursor respectively.
Lots of good answers already, but none of them mentions the <dialog> element.
Using this element we can create a solution similar to the masking <div>.
Here we use showModal() to "hide" elements, and we use ::backdrop to set the cursor style to wait on the entire page:
function showWaitDialog() {
document.getElementById('id_dialog').showModal();
}
#id_dialog, #id_dialog::backdrop {
cursor: wait;
}
<button onclick="showWaitDialog()">click me</button>
<dialog id="id_dialog">busy...</dialog>
The dialog is hidden by default, and can be shown using either the show() method, or the showModal() method, which prevents clicking outside the dialog.
The dialog can be forced to close using the close() method, if necessary.
However, if your button links to another page, for example, then the dialog will disappear automatically as soon as the new page is loaded.
Note that the dialog can also be closed at any time by hitting the Esc key.
CSS can be used to style the dialog however you like.
The example uses the html onclick attribute, just for simplicity. Obviously, addEventListener() could also be used.
Late to the party but simply give the Html tag an id by targeting
document.documentElement
and in the CSS place at the top
html#wait * {
cursor: wait !important;
}
and simply remove it when you want to stop this cursor.