First of all, I'm not very advanced at code and tend to only do this part time so please excuse all terrible/ugly code! I appreciate there are already some solutions out there but I can't seem to make any of them work with my code so would really appreciate some help!
I'm using isotope grid and trying to setup an infinite scroll. I want to load 10 images at a time when the user scrolls to the bottom by taking these images from an array and appending them to a temp div.
This is working perfectly when scrolling slowly, but as soon as you scroll quickly the function seems to fire multiple times, it gets a little glitchy and loads lots of images at once.
$(window).scroll(function() {
var scrollTop = $(window).scrollTop();
var windowHeight = $(window).height();
var docuHeight = $(document).height();
if(scrollTop + windowHeight == docuHeight){
nextTenImages = imagesData.splice(0,10);
var content = ""
for (var i = 0; i < nextTenImages.length; i++) {
content +=
"<div class='box " + nextTenImages[i]["type"] + "'" + ">" +
"<div class='box-wrapper'>" +
"<img src='" + nextTenImages[i]["src"] + "' />" +
"</div>" +
"</div>"
};
$('body').append('<div id="temp-load"><div id="grid"></div></div>');
$('#temp-load > #grid').append(content)
$('#temp-load > #grid').children().css({
opacity: 0
});
var toAdd = $('#temp-load > #grid').html();
$container.isotope('insert', $(toAdd), function(){
$container.children().css({
opacity: 1
});
$('#temp-load').remove();
});
}
});
Make a single timeout to run the callback. This may avoid the function from executing multiple times.
var timer;
function scrollEvt() {
/* scroll actions */
}
$(window).scroll(function() {
/* clear the old timeout */
clearTimeout(timer);
/* wait until 400 ms for callback */
timer = setTimeout(scrollEvt, 400);
});
Using other ways may result in problems (like comparing (window.performance || Date).now())...
Unbind that specific scroll event till your delayed operation is completed to prevent accumulating more of the event triggers which create the duplication behaviour as in your case.
var winCached = $(window),
docCached = $(document)
var currLeng = 0;
function addContent() {
dettachScrollEvent();
setTimeout(function() { //this timeout simulates the delay from the ajax post
for (var i = currLeng; i < currLeng + 100; i++)
$('div').append(i + '<br />');
currLeng = i;
console.log("called loader!");
attachScrollEvent();
}, 500);
}
function infiNLoader() {
if (winCached.scrollTop() + winCached.height() > docCached.height() - 300) {
addContent();
//alert("near bottom! Adding more dummy content for infinite scrolling");
}
}
function attachScrollEvent() {
winCached.scroll(infiNLoader);
}
function dettachScrollEvent() {
winCached.unbind('scroll', infiNLoader);
}
addContent();
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div></div>
Related
I am trying to accomplish an infinite loop of items inside 1 main div.
The idea is to show part of the items, then slide the left one outside of the screen, whilst another is added from the right side of the screen.
The following function is working, but the animate method doesn't work, it just changing the css without animating it.
Am I doing it wrong?
Also any better approach would be welcome. I tried to search jQuery solutions but they didn't work well for me so i wanted to create another one.
jQuery(document).ready(function() {
var items = jQuery('.companies-logos div');
var temp;
var item_width = 0;
if(items.length > 9) {
items.slice(9).remove();
setInterval(function(){
jQuery('.companies-logos').append(items[9]);
items[9].style.marginLeft = '0';
item_width = items[0].offsetWidth + 12.5;
jQuery(items[0]).animate({marginLeft: '-' + item_width + 'px'}, 2000);
// items[0].style.marginLeft = '-' + item_width + 'px';
temp = items[0];
jQuery(items[0]).remove();
items.splice(0, 1);
items.push(temp);
// jQuery(items[items.length-1]).css('transition', 'all 2500ms');
}, 2500);
}
});
For those interested in achieving the wanted result from above:
$(function(){
setInterval(function(){
var item_width = $('.companies-logos ul li:first-child').width() + 25;
$(".companies-logos ul li:first-child").animate({"margin-left": -item_width}, 1500, function(){
$(this).css("margin-left",25).appendTo(".companies-logos ul");
});
}, 2000);
});
I have div elements that are appended on a parent div. Depending on the screen size, the div elements should resize but my efforts to do so using jquery .css() are failing all through. Kindly help. Below is a sample of my code
var len = data.length; //a number comes here
var i;
for(i=1;i<len+1;i++){
$(".app-body").append(
"<div class='list-box' onclick='OpenHymn("+ i +")'>" +
"<div class='circle-text'><div class='hym_num'>" + i + "</div></div>" +
"</div>");
}
//calling the function that should resize the divs
GridBoxes();
function GridBoxes(){
var width=window.innerWidth;
var divisible=parseInt(width-40);
var size=divisible/4;
var boxes=$('.list-box');
boxes.css("width",size+"px");
boxes.css("height",size+"px");
}
Put the function inside $(window).resize() for it to fire everytime the window is resized
Code:
$(window).resize(function() {
GridBoxes();
})
Example
You should really use media query's for this kind of problem.
try this
window.addEventListener("resize", GridBoxes);//called on window resize
var len = 4; //changed to a number here for testing
var i;
for(i=1;i<len+1;i++){
$(".app-body").append(
"<div class='list-box' onclick='OpenHymn("+ i +")'>" +
"<div class='circle-text'><div class='hym_num'>" + i + "</div></div>" +
"</div>");
}
//calling the function that should resize the divs
//GridBoxes();
function GridBoxes(){
var width=window.innerWidth;
var divisible=parseInt(width-40);
var size=divisible/4;
var boxes=$('.list-box');
for(var b=0;b<boxes.length;b++){
boxes[b].css("width",size+"px");
boxes[b].css("height",size+"px");
}
}
.list-box{border:1px solid red;}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="app-body"></div>
I want to paginate a text in some div so it will fit the allowed area
Logic is pretty simple:
1. split text into words
2. add word by word into and calculate element height
3. if we exceed the height - create next page
It works quite good
here is JS function i've used:
function paginate() {
var newPage = $('<pre class="text-page" />');
contentBox.empty().append(newPage);
var betterPageText='';
var pageNum = 0;
var isNewPage = false;
var lineHeight = parseInt(contentBox.css('line-height'), 10);
var wantedHeight = contentBox.height() - lineHeight;
for (var i = 0; i < words.length; i++) {
if (isNewPage) {
isNewPage = false;
} else {
betterPageText = betterPageText + ' ' + words[i];
}
newPage.text(betterPageText + ' ...');
if (newPage.height() >= wantedHeight) {
pageNum++;
if (pageNum > 0) {
betterPageText = betterPageText + ' ...';
}
newPage.text(betterPageText);
newPage.clone().insertBefore(newPage)
betterPageText = '...';
isNewPage = true;
} else {
newPage.text(betterPageText);
}
}
contentBox.craftyslide({ height: wantedHeight });
}
But when i add an image it break everything. In this case text overflows 'green' area.
Working fiddle: http://jsfiddle.net/74W4N/7/
Is there a better way to paginate the text and calculate element height?
Except the fact that there are many more variables to calculate,not just only the word width & height, but also new lines,margins paddings and how each browser outputs everything.
Then by adding an image (almost impossible if the image is higher or larger as the max width or height) if it's smaller it also has margins/paddings. and it could start at the end of a line and so break up everything again.basically only on the first page you could add an image simply by calculating it's width+margin and height+margin/lineheight. but that needs alot math to get the wanted result.
Said that i tried some time ago to write a similar script but stopped cause of to many problems and different browser results.
Now reading your question i came across something that i read some time ago:
-webkit-column-count
so i made a different approach of your function that leaves out all this calculations.
don't judge the code as i wrote it just now.(i tested on chrome, other browsers need different prefixes.)
var div=document.getElementsByTagName('div')[0].firstChild,
maxWidth=300,
maxHeigth=200,
div.style.width=maxWidth+'px';
currentHeight=div.offsetHeight;
columns=Math.ceil(currentHeight/maxHeigth);
div.style['-webkit-column-count']=columns;
div.style.width=(maxWidth*columns)+'px';
div.style['-webkit-transition']='all 700ms ease';
div.style['-webkit-column-gap']='0px';
//if you change the column-gap you need to
//add padding before calculating the normal div.
//also the line height should be an integer that
// is divisible of the max height
here is an Example
http://jsfiddle.net/HNF3d/10/
adding an image smaller than the max height & width in the first page would not mess up everything.
and it looks like it's supported by all modern browsers now.(with the correct prefixes)
In my experience, trying to calculate and reposition text in HTML is almost an exercise in futility. There are too many variations among browsers, operating systems, and font issues.
My suggestion would be to take advantage of the overflow CSS property. This, combined with using em sizing for heights, should allow you to define a div block that only shows a defined number of lines (regardless of the size and type of the font). Combine this with a bit of javascript to scroll the containing div element, and you have pagination.
I've hacked together a quick proof of concept in JSFiddle, which you can see here: http://jsfiddle.net/8CMzY/1/
It's missing a previous button and a way of showing the number of pages, but these should be very simple additions.
EDIT: I originally linked to the wrong version for the JSFiddle concept
Solved by using jQuery.clone() method and performing all calculations on hidden copy of original HTML element
function paginate() {
var section = $('.section');
var cloneSection = section.clone().insertAfter(section).css({ position: 'absolute', left: -9999, width: section.width(), zIndex: -999 });
cloneSection.css({ width: section.width() });
var descBox = cloneSection.find('.holder-description').css({ height: 'auto' });
var newPage = $('<pre class="text-page" />');
contentBox.empty();
descBox.empty();
var betterPageText = '';
var pageNum = 0;
var isNewPage = false;
var lineHeight = parseInt(contentBox.css('line-height'), 10);
var wantedHeight = contentBox.height() - lineHeight;
var oldText = '';
for (var i = 0; i < words.length; i++) {
if (isNewPage) {
isNewPage = false;
descBox.empty();
}
betterPageText = betterPageText + ' ' + words[i];
oldText = betterPageText;
descBox.text(betterPageText + ' ...');
if (descBox.height() >= wantedHeight) {
if (i != words.length - 1) {
pageNum++;
if (pageNum > 0) {
betterPageText = betterPageText + ' ...';
}
oldText += ' ... ';
}
newPage.text(oldText);
newPage.clone().appendTo(contentBox);
betterPageText = '... ';
isNewPage = true;
} else {
descBox.text(betterPageText);
if (i == words.length - 1) {
newPage.text(betterPageText).appendTo(contentBox);
}
}
}
if (pageNum > 0) {
contentBox.craftyslide({ height: wantedHeight });
}
cloneSection.remove();
}
live demo: http://jsfiddle.net/74W4N/19/
I actually came to an easier solution based on what #cocco has done, which also works in IE9.
For me it was important to keep the backward compatibility and the animation and so on was irrelevant so I stripped them down. You can see it here: http://jsfiddle.net/HNF3d/63/
heart of it is the fact that I dont limit height and present horizontal pagination as vertical.
var parentDiv = div = document.getElementsByTagName('div')[0];
var div = parentDiv.firstChild,
maxWidth = 300,
maxHeigth = 200,
t = function (e) {
div.style.webkitTransform = 'translate(0,-' + ((e.target.textContent * 1 - 1) * maxHeigth) + 'px)';
div.style["-ms-transform"] = 'translate(0,-' + ((e.target.textContent * 1 - 1) * maxHeigth) + 'px)';
};
div.style.width = maxWidth + 'px';
currentHeight = div.offsetHeight;
columns = Math.ceil(currentHeight / maxHeigth);
links = [];
while (columns--) {
links[columns] = '<span>' + (columns + 1) + '</span>';
}
var l = document.createElement('div');
l.innerHTML = links.join('');
l.onclick = t;
document.body.appendChild(l)
i have a table with 3 cells the middel 1 in a black image so it will look like there is a line in the middle of the screen.
now in the other cell i want to show pictures, so i tryed to do a loop that changing the images every second with by hiding the cells and then show them.
the script:
$(window).ready(function () {
//the images sits in a div with a hidden property.
var AlumniumPictures = $("#AlumnimPictureHolder").children();
var ShipozimPictures = $("#ShipozimPictureHolder").children();
//var timer = $.timer(yourfunction, 10000);
for (var i = 0; i < 10; i++) {
$(".almoniyomButtonTD").css({
"background-image": "url(" + $(AlumniumPictures[i]).attr('src') + ")"
});
$(".shipozimButtonTD").css({
"background-image": "url(" + $(ShipozimPictures[i]).attr('src') + ")"
});
$(".almoniyomButtonTD").hide();
$(".shipozimButtonTD").hide();
$(".almoniyomButtonTD").show(1100);
$(".shipozimButtonTD").show(1100);
//for some reson the code dosnt work if im not using the setInterval method.
document.setInterval(1000);
}
});
this is not working it only show me the first images and then stop.
is there a batter way to do this?
am im doing this right?
I think you might do this for the background:
$(window).ready(function () {
//the images sits in a div with a hidden property.
var AlumniumPictures = $("#AlumnimPictureHolder").children();
var ShipozimPictures = $("#ShipozimPictureHolder").children();
//var timer = $.timer(yourfunction, 10000);
time = 0;
step = 1000; // One secund
for (var i = 0; i < 10; i++) {
time+= step;
$(".almoniyomButtonTD").hide();
$(".shipozimButtonTD").hide();
$(".almoniyomButtonTD").show(1100);
$(".shipozimButtonTD").show(1100);
//for some reson the code dosnt work if im not using the setInterval method.
document.setInterval("changeBG('" + $(AlumniumPictures[i]).attr('src') + "', '.almoniyomButtonTD')", time);
document.setInterval("changeBG('" + $(AlumniumPictures[i]).attr('src') + "', '.shipozimButtonTD')", time);
}
});
function changeBG(image, obj) {
$(obj).css({
"background-image": "url(" + image + ")"
});
}
But I don't undestand what you want to do with this:
$(".almoniyomButtonTD").hide();
$(".shipozimButtonTD").hide();
$(".almoniyomButtonTD").show(1100);
$(".shipozimButtonTD").show(1100);
See the docs about setInterval. You need to tell it what code you are running.
window.setInterval(code, delay);
You aren't specifying any code for it to run! Try placing your for statement in a function and calling that.
Also, from Mozilla and MS docs setInterval seems to be on the window object, not on the document object. I don't think it will work the way you have it. I imagine if you looked in a debugger you would see an error thrown.
window.setInterval(myFunction, 1000);
function myFunction() {
for (var i = 0; i < 10; i++) {
$(".almoniyomButtonTD").css({
"background-image": "url(" + $(AlumniumPictures[i]).attr('src') + ")"
});
$(".shipozimButtonTD").css({
"background-image": "url(" + $(ShipozimPictures[i]).attr('src') + ")"
});
$(".almoniyomButtonTD").hide();
$(".shipozimButtonTD").hide();
$(".almoniyomButtonTD").show(1100);
$(".shipozimButtonTD").show(1100);
}
}
I'm looking to build a very simple whack a mole-esque game in javascript. Right now I know how to do everything else except the scoring. My current animation code is as follows
<script language="JavaScript"
type="text/javascript">
var urls;
function animate(pos) {
pos %= urls.length;
document.images["animation"].src=urls[pos];
window.setTimeout("animate(" + (pos + 1) + ");",
500);
}
window.onload = function() {
urls = new Array(
"Frame1.jpg","Frame2.jpg"
);
animate(0);
}
</script>
So far it all works, the first frame is the hole and the second is the groundhog/mole out of the hole. I need to count the clicks on the second frame but I can't figure out how to incorporate a counter. Help? (Sorry if the code doesn't show up correctly, first time using this site)
Here is an example that counts clicks on the flashing animation: http://jsfiddle.net/maniator/TQqJ8/
JS:
function animate(pos) {
pos %= urls.length;
var animation = document.getElementById('animation');
var counter = document.getElementById('counter');
animation.src = urls[pos];
animation.onclick = function() {
counter.innerHTML = parseInt(counter.innerHTML) + 1;
}
setTimeout(function() {
animate(++pos);
}, 500);
}
UPDATE:
Here is a fiddle that only detects click on one of the images: http://jsfiddle.net/maniator/TQqJ8/8/