I have the following code that isnt working. It is supposed to Make a div that when clicked, moves up and fades away, then comes back down and reappears. However whenever I add the part to come back down and reappear, The second part executes before the the second part has a chance to transition. Any help to make it delay so that the div moves up and then comes down like I want it to? I've tried using a timer, but I dont think Ive been doing it right. Here's the code.
/*function sleep(milliseconds) {
var start = new Date().getTime();
for (var i = 0; i < 1e7; i++) {
if ((new Date().getTime() - start) > milliseconds){
break;
}
}
}*/
function clicked(x) {
x.style.top="-50px";
x.style.opacity="1";
//sleep(500);
//setTimeout(function(){alert('hi)}, 500);
//x.innerHTML="女";
x.style.top="50px";
x.style.opacity="1";
}
You can split the two motions and activate the second part with setTimeout
var click = document.getElementById('click');
click.addEventListener('click', function() {
slideUp(click);
setTimeout(function() { slideDown(click); }, 500);
});
See JSFiddle
If you can use jQuery, you might employ delay
$('#click').click(function() {
$(this).slideUp().delay(500).slideDown();
});
JSFiddle
Related
I'm doing an easy slider with buttons, it works fine, but I'd like to add TimeOut() function to current code, to allow slides to change automatically.
I tried to do that with jQuery but it didn't work.
$('.reviews-slider-button').click(function() {
var i = $(this).index();
$('.reviews-slider-person').hide();
$('.reviews-slider-person-' + (i + 1)).show();
});
I'd like to change automatically slider every 10 seconds, and when I would click on .reviews-slider-button it would reset the timer ( to avoid situation I click to change slide, and timer automatically change to the next one).
I'd be grateful for your advice's.
You can use setInterval to click your button every 10 seconds:
var timer = ''; // Make global variable
function ScrollAuto() {
temp = setInterval(function() {
$('.nextButton').click();
}, 10000)
return timer;
}
And to reset your timer, inside your reset button add:
clearInterval(timer);
Similarly to the answer from Shree, but make it cleaner, but use timeout, not interval, you want the system to change slide every 10 seconds unless you click, in which case you reset the timeout, go to the next slide, and set up the next timeout
Something like this:
var slideMaxDuration = 10000; // in ms
var slideTimer = void 0;
function nextSlide() {
clearInterval(slideTimer);
// ... go to next slide ...
}
function autoContinue() {
nextSlide();
setTimeout(autoContinue, slideMaxDuration);
}
$('.reviews-slider-button').click(autoContinue);
You also need to set up the initial autoContinue when you want the whole thing to start.
I have a web page that does a lot of calculations as part of it's loading.
I want to display a spinner bar while the page is "thinking" so that the end user knows the delay is to be expected.
The way I was going to do this is to display a GIF file that would be a spinning wheel, and hide the table that would be my output.
The problem is, once the function starts, updates to the page seem to freeze until the function is done. Therefore, the end user never sees the "In Process" section.
The sample code I put together to demonstrate my problem is:
<!DOCTYPE html>
<html>
<body>
<script>
function show(id, value) {
document.getElementById(id).style.display = value ? 'block' : 'none';
}
function Processing(x)
{
if (x === true)
{
show('page', false);
show('loading', true);
}
else
{
show('page', true);
show('loading', false);
}
}
function MainProcess()
{
Processing(true) // Set to "Show processing..."
var start = new Date().getTime(); // Sleep a few seconds
for (var i = 0; i < 5; i++) {
if ((new Date().getTime() - start) < 3000) { i = 1 }
}
Processing(false) // Set to "Show Completed processing..."
}
window.onload = function() {
show('page', false);
show('loading', false);
};
</script>
<div id="loading">
<h1>Processing your request.</h1>
</div>
<div id="page">
<DIV class="body">
<h3>Done Processing your request.</h3>
</DIV>
</div>
<div id="buttons">
<button onclick="MainProcess();">Start Timer</button>
<button onclick="Processing(false);">Set to Completed</button>
<button onclick="Processing(true);">Set to Processing</button>
</body>
</html>
When I run this, it presents three buttons.
When you hit "Start Timer", it should show processing for a few seconds, then display done. Instead, the button changes colors and otherwise appears to do nothing till the timer is done, and it displays complete.
(I am new to JavaScript but a seasoned pro in several other languages. Is there a "DoEvents" type of call I can make like in Visual Basic or Powershell?)
The problem seems to be that the DOM update (i.e. changing the display properties on your DIVs) doesn't complete before your processing function starts. One option would be to use window.setTimeout to delay the start of your processing function to allow the DOM update to complete:
function MainProcess()
{
Processing(true); // Set to "Show processing..."
// Pause for 100 ms before starting time-consuming code to allow dom update to c
var domUpdateDelay = 100;
window.setTimeout(function() {
var start = new Date().getTime(); // Sleep a few seconds
for (var i = 0; i < 5; i++) {
if ((new Date().getTime() - start) < 3000) { i = 1 }
}
Processing(false) // Set to "Show Completed processing..."
}, 100);
}
window.setTimeout takes two arguments: the first argument is a function that runs after x milliseconds, where x is the second argument.
The problem with this approach is that an appropriate delay for setTimeout will vary across machines/users/browsers/runs. However, my guess is that this will probably not be an issue in 99% of cases.
I think you can take advantage of a function like setTimeout (https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/setTimeout), say:
setTimeout(function() {
Processing(false);
}, 5000);
I think what's happening is you're nearly crashing the browser with that loop. I may have misunderstood what parts of your question were just there for demonstration purposes.
I am making an info screen, and for that, it needs to show reviews from their customers pulled from Trustpilot.
I got the reviews and everything formatted in HTML showing the 20 latest, but I want to present it very sweet. I am not a JavaScript guru, but I thought i would do it using jQuery and its fadein function.
What is want, is have 20 unique divs fading in with X milliseconds difference popping randomly up. By unique I mean, that each div must have unique content. And by randomly popping up, I mean that if box 1 spawns first, then the next should be 5, then 14 etc, and then another cycle the next time around.
Just like what I made here;
$(function() {
var box = $('.box');
var delay = 100;
for (i = 0; i < 30; i++) {
setTimeout(function() {
var new_box = box.clone();
$('.container').append(new_box);
new_box.fadeIn();
}, delay);
delay += 500; // Delay the next box by an extra 500ms
}
});
http://jsfiddle.net/CCawh/5/
Is this even possible, and how would this be done?
I am very new to JavaScript, so please bear with me if I ask to much
Thanks in advance.
EDIT:
The HTML i want to spawn will all be wrapped in divs, so it would go like this;
<div id="one">content</div>
<div id="two">content</div>
<div id="three">content</div>
<div id="four">content</div>
etc.
Made up a nice function for you. I believe this may be what you are looking for
Here's a rundown of how it works :
Populate an array with numbers randomly generated 1-10 in this case.
Run through that array with a set interval, and when everything has
been added stop the interval
pretty straightforward from there. Set the visibility etc. You should be able to change up the function to dynamically add HTML elements and what-not, but just giving you something to start with.
var usedNum = [];
var i, j, y;
i = 0;
for(y = 0; y < 10; y++){
var x = Math.floor((Math.random() * 10) + 1);
if(!isUsed(x)) usedNum.push(x);
else y--;
}
var showInterval = setInterval ( function(){
if(i == 10){
clearInterval(showInterval);
}
$(".container div[data-line='" + usedNum[i] + "']").css({opacity: 0.0, visibility: "visible"}).animate({opacity: 1.0});
i++;
}, 500);
function isUsed(num) {
var used = false;
for(j = 0; j < usedNum.length; j++){
if(usedNum[j] == num){
used = true;
}
}
return used;
}
Demo fiddle : http://jsfiddle.net/xS39F/3/
Edit:
You can also mess around with the speed of the animation. In this demo (http://jsfiddle.net/adjit/XYU34/1/) I set the speed to 1000 so the next element starts fading in before the last element was done fading in. Makes it look a little smoother.
Instead of using a for loop and setTimeout, would setInterval work better for what you need? Some HTML might help better understand what you're trying to achieve.
$(function() {
var box = $('.box');
var delay = 100;
var interval = setInterval(function() {
var new_box = box.clone();
$('.container').append(new_box);
new_box.fadeIn();
}, delay);
delay += 500; // Delay the next box by an extra 500ms
}, delay);
});
I'm using a js image gallery on a magento site. Because Magento uses prototype, I've used prototype for this gallery; it's a simple application and I thought it unnecessary to load jQuery library as well just for this one element.
If you have a look at http://web74.justhost.com/~persia28/ in IE8 or less, the transitions between gallery slides is so slow, to the point where the text from one slide remains visible for a short time when the next slide is in place.
I know IE is rubbish with js, but I thought the extent of the slowness here is extreme, even for IE.
I don't want to load jQuery library just for this one gallery, Magento is enough of a tank as it is; so if it came to that I might opt for just putting the text in the images, not in HTML.
Anyway, would be great to hear your wisdom.
Many thanks, and here is the js code for the gallery.
var i = 0;
// The array of div names which will hold the images.
var image_slide = new Array('image-1', 'image-2', 'image-3');
// The number of images in the array.
var NumOfImages = image_slide.length;
// The time to wait before moving to the next image. Set to 3 seconds by default.
var wait = 4000;
// The Fade Function
function SwapImage(x,y) {
$(image_slide[x]).appear({ duration: 1.5 });
$(image_slide[y]).fade({duration: 1.5});
}
// the onload event handler that starts the fading.
function StartSlideShow() {
play = setInterval('Play()',wait);
$('PlayButton').hide();
$('PauseButton').appear({ duration: 0});
}
function Play() {
var imageShow, imageHide;
imageShow = i+1;
imageHide = i;
if (imageShow == NumOfImages) {
SwapImage(0,imageHide);
i = 0;
} else {
SwapImage(imageShow,imageHide);
i++;
}
}
function Stop () {
clearInterval(play);
$('PlayButton').appear({ duration: 0});
$('PauseButton').hide();
}
function GoNext() {
clearInterval(play);
$('PlayButton').appear({ duration: 0});
$('PauseButton').hide();
var imageShow, imageHide;
imageShow = i+1;
imageHide = i;
if (imageShow == NumOfImages) {
SwapImage(0,imageHide);
i = 0;
} else {
SwapImage(imageShow,imageHide);
i++;
}
}
function GoPrevious() {
clearInterval(play);
$('PlayButton').appear({ duration: 0});
$('PauseButton').hide();
var imageShow, imageHide;
imageShow = i-1;
imageHide = i;
if (i == 0) {
SwapImage(NumOfImages-1,imageHide);
i = NumOfImages-1;
} else {
SwapImage(imageShow,imageHide);
i--;
}
}
I looked at the site and it doesn't seem slow, it takes the same time to run. It looks as though the text is not changing in opacity until the end of the animation then is just being hidden. When I look with IE7 it works normally which is a clue, IE8 has a different way of making transparencies.
Magento still ships with Prototype 1.6.0 when I know that Prototype 1.6.1 fixes several IE8 bugs and Prototype 1.7 fixes some IE9 bugs too. You could try upgrading Prototype and Scriptaculous in the js/prototype/ and js/scriptaculous/ directories. I don't know if that exact problem is included which is why you should make a backup before overwriting files, if this doesn't work you will have something to rollback to.
Basically I need the thumbnails to rotate every time the user hovers over an image. Here is my failed attempt:
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.6.1/jquery.min.js"></script>
<script type="text/javascript">
$(function() {
$('img').hover(function() {
theImage = $(this).attr('id');
otherImages = $(this).attr('class').split('#');
rotateThumbs(otherImages, theImage);
}, function() {
//
});
});
function rotateThumbs(otherImages, theImage) {
for (i=0; i < otherImages.length; i++) {
setInterval($('#'+theImage).attr('src', otherImages[i]), 1000);
}
}
</script>
<img id="myImage" src="http://www.google.com/images/logos/ps_logo2.png" class="http://www.google.com/images/logos/ps_logo2.png#http://l.yimg.com/a/i/ww/met/yahoo_logo_us_061509.png#http://dogandcat.com/images/cat2.jpg" width="174" height="130" />
Does anyone know how this may be accomplished?
Some issues here.
setInterval requires a function reference as it's first argument, but you are executing code that returns a jQuery object.
setInterval executes the first function repeatedly at the specified interval. Is that what you are trying to do? Swap images every second?
Depending on how you correct the first issue, you could run into an issue where i is otherImages.length and thus the src is set to undefined.
Assuming you worked around issue 3, you will have the problem that the image swaps will happen imperceptibly fast and it will appear as though the last image is always displayed.
Instead, don't use a loop. Increment a counter each time a new image is displayed. Try this:
function rotateThumbs(otherImages, theImage) {
var i = 0;
var interval = setInterval(function() {
$('#'+theImage).attr('src', otherImages[i++]);
if (i >= otherImages.length) {
clearInterval(interval);
}
}, 1000);
}
I've implemented a fully-functional example here. This addresses some of the issues that #gilly3 notes, but uses closures instead of an incrementing counter to keep track of the current image:
$(function() {
$('img').hover(function() {
// declaring these variables here will preserve
// the references in the function called by setInterval
var $img = $(this),
imageList = $img.attr('class').split('#'),
intervalId;
// start the cycle
intervalId = window.setInterval(function() {
var next = imageList.pop();
if (next) {
$img.attr('src', next);
} else {
// stop the cycle
intervalId = window.clearInterval(intervalId);
}
}, 1000);
}, function() {});
});
As you can see, using a closure is much easier when you declare the function passed to setInterval inline, rather than as a separate, named function. You could still have a rotateThumbs function if you wanted, but you might need to do some more work to ensure that the variables were being passed properly.
Edit: I made an updated version that continues to cycle as long as the mouse is hovering.
I have adjusted the answer for Sam, taking pre-loading the image into account, so that you won't have a possible deplay at the first rotation.
function rotateThumbs(otherImages, theImage) {
if(!$('#'+theImage).data('setup')){
$('#'+theImage).data('setup', true); // do not double pre-loading images
var $body = $('body');
for(var j = 0; j < otherImages.length; j++){
$body.append($('<img/>').attr('src', otherImages[j])
.css('display', 'none'));
}
}
var i= 0;
setInterval(function(){
$('#'+theImage).attr('src', otherImages[i++]);
if(i >= otherImages.length){i = 0}
}, 1000);
}