I have a simple throbber, that is automatically shown when an ajax request lasts longer than 3 seconds. This throbber consists mainly of an animated GIF-Image.
Now, I want to use the same throbber also for regular links, meaning that when I click a link and it takes the server more than 3 seconds to respond, the throbber is shown.
Unfortunately, it seems that firefox is unable to play the animation, while it is "reloading" the webpage. The javascript is called and fades the throbber correctly in, but is it not spinning.
How can I make firefox play the GIF-Animation while it is loading?
This is the function:
// Throbber manager
function Throbber() { }
Throbber.prototype = {
image : null,
requests : 0,
requestOpened : function(event) {
if (this.requests == 0) {
this.image.src = 'throbber.gif';
}
this.requests++;
},
requestLoaded : function(event) {
this.requests--;
if (this.requests == 0) {
this.image.src = 'throbber_stopped.gif';
}
},
clicked : function() {
request_manager.abortAll();
},
// Called on window load
attach : function() {
this.image = document.getElementById('throbber');
if (this.image && request_manager) {
request_manager.addEventListener('open', [this, this.requestOpened]);
request_manager.addEventListener('load', [this, this.requestLoaded]);
request_manager.addEventListener('abort', [this, this.requestLoaded]);
this.image.onclick = function() { Throbber.prototype.clicked.apply(throbber, arguments); };
}
}
}
var throbber = new Throbber();
window.addEventListener('load', function() { Throbber.prototype.attach.apply(throbber, arguments); }, false);
function SimpleDemo() { }
SimpleDemo.prototype = {
// The AjaxRequest object
request : null,
// Setup and send the request
run : function() {
this.request = request_manager.createAjaxRequest();
this.request.get = {
one : 1,
two : 2
};
this.request.addEventListener('load', [this, this.ran]);
this.request.open('GET', 'xml.php');
var req = requests[this.request.id];
return setTimeout(function() { req.send(); }, 5000);
},
// Triggered when the response returns
ran : function(event) {
alert(event.request.xhr.responseText);
}
}
If you use jQuery:
$("#throbber").show();
/* Your AJAX calls */
$("#throbber").hide();
Check to see when the DOM is ready before calling all your Ajax stuff.
using Prototype:
document.observe("dom:loaded", function() {
//your code
});
using jQuery:
$(document).ready(function() {
//your code
});
Or Refer this: http://plugins.jquery.com/project/throbber
I just tried my old code and found out that this issue does not exist anymore in Firefox 10.0.2
Related
I'm using the plugin smoothstate.js on my website. For some reason, every now and again when I navigate through the pages using the back and forward buttons, the back button stops working.
The URL changes but the content remains the same?
I've checked the console for errors this is displaying:
TypeError: Cannot read property 'state' of undefined
Does anyone know why this is happening? Like I said, the majority of the time it works okay but all of sudden it doesn't.
The code I'm using is like so:
$(function(){
'use strict';
var options = {
prefetch: true,
debug:true,
cacheLength: 0,
repeatDelay: 500,
onStart: {
duration: 0, // Duration of our animation
render: function ($container) {
// Add your CSS animation reversing class
$container.addClass('is-exiting');
// Restart your animation
smoothState.restartCSSAnimations();
}
},
onProgress: {
// How long this animation takes
duration: 0,
// A function that dictates the animations that take place
render: function ($container) {
$container.addClass('is-loading');
$('#progressBar').append('<div id="bar"></div>');
var progress = '100%';
$('#bar').animate({
width: progress
}, 400);
}
},
onReady: {
duration: 0,
render: function ($container, $newContent) {
$container.removeClass('is-loading is-exiting');
// Inject the new content
$container.html($newContent);
},
},
onAfter: function() {
navbarAnimate();
closeMenu();
ImageSliders();
initPhotoSwipeFromDOM('.gallery');
ImageOverlay();
window.parsePinBtns();
backToTop();
}
},
smoothState = $('#main').smoothState(options).data('smoothState');
});
I also ran into this issue which happens when the back and forward buttons are clicked too fast without the page fully loading. A hacky solution for me was to reload the page if page.cache[page.href] is undefined.
/** Handles the popstate event, like when the user hits 'back' */
onPopState = function(e) {
if(e.state !== null || typeof e.state !== undefined) {
var url = window.location.href;
var $page = $('#' + e.state.id);
var page = $page.data('smoothState');
if (typeof(page.cache[page.href]) !== 'undefined') {
var diffUrl = (page.href !== url && !utility.isHash(url, page.href));
var diffState = (e.state !== page.cache[page.href].state);
if(diffUrl || diffState) {
if (diffState) {
page.clear(page.href);
}
page.load(url, false);
}
}
else {
//reload the page if page.cache[page.href] is undefined
location.reload();
}
}
},
I have two function print and callPrint bellow. I click call function print the first time is right.
But when click call function print the second or third then function callPrint will be call 2 times or 3 times.
I have debug on attack file.
function print(url) {
console.log('print');
var _this = this, iframeId = 'iframeprint', $iframe = $('iframe#iframeprint');
if ($iframe.attr('src') != url) {
$.when(
$iframe.attr('src', 'about:blank'),
$iframe.load(function () {
console.log($iframe.prop('contentWindow').document.readyState);
})
).done(function () {
$iframe.attr('src', url);
$iframe.load(function () {
console.log('new');
_this.callPrint(iframeId);
});
});
} else {
console.log('old');
_this.callPrint(iframeId);
}
}
// initiates print once content has been loaded into iframe
function callPrint(iframeId) {
console.log('callPrint');
$('div.wait').hide();
var PDF = document.getElementById(iframeId);
PDF.focus();
PDF.contentWindow.print();
return false;
}
A JavaScript function is repeated many times
The problem is because you're attaching two new load() event handlers to the iframe every time print() is called. To fix this, add a single load() event handler and call your function from in there. This will be triggered whenever you update the src attribute on the element. Try this:
var $iframe = $('#iframeprint').load(function() {
// You'll need to make sure the function is in scope of the handler
// There's not enough information in the OP for me to show you how
callPrint('iframeprint');
});
function print(url) {
var _this = this;
if ($iframe.attr('src') != url) {
$iframe.attr('src', url);
} else {
_this.callPrint(iframeId);
}
}
Thanks "Rory McCrossan". I add setTimeout function when callPrint so dialog print will open. But I can't vote for you at the moment.
var $iframe = $('iframe#iframeprint').load(function () {
// You'll need to make sure the function is in scope of the handler
// There's not enough information in the OP for me to show you how
setTimeout(function () {
callPrint('iframeprint');
}, 100);
});
function print(url) {
if ($iframe.attr('src') != url) {
$iframe.attr('src', url);
} else {
console.log('old');
callPrint('iframeprint');
}
}
// initiates print once content has been loaded into iframe
function callPrint(iframeId) {
$('div.wait').hide();
var PDF = document.getElementById(iframeId);
PDF.focus();
PDF.contentWindow.print();
}
I can't figure out how to do it.
I have two separate scripts. The first one generates an interval (or a timeout) to run a specified function every x seconds, i.e. reload the page.
The other script contains actions for a button to control (pause/play) this interval.
The pitfall here is that both sides must be asyncronous (both run when the document is loaded).
How could I properly use the interval within the second script?
Here's the jsFiddle: http://jsfiddle.net/hm2d6d6L/4/
And here's the code for a quick view:
var interval;
// main script
(function($){
$(function(){
var reload = function() {
console.log('reloading...');
};
// Create interval here to run reload() every time
});
})(jQuery);
// Another script, available for specific users
(function($){
$(function(){
var $playerButton = $('body').find('button.player'),
$icon = $playerButton.children('i');
buttonAction = function(e){
e.preventDefault();
if ($(this).hasClass('playing')) {
// Pause/clear interval here
$(this).removeClass('playing').addClass('paused');
$icon.removeClass('glyphicon-pause').addClass('glyphicon-play');
}
else {
// Play/recreate interval here
$(this).removeClass('paused').addClass('playing');
$icon.removeClass('glyphicon-play').addClass('glyphicon-pause');
}
},
buttonInit = function() {
$playerButton.on('click', buttonAction);
};
buttonInit();
});
})(jQuery);
You could just create a simple event bus. This is pretty easy to create with jQuery, since you already have it in there:
// somewhere globally accessible (script 1 works fine)
var bus = $({});
// script 1
setInterval(function() {
reload();
bus.trigger('reload');
}, 1000);
// script 2
bus.on('reload', function() {
// there was a reload in script 1, yay!
});
I've found a solution. I'm sure it's not the best one, but it works.
As you pointed out, I eventually needed at least one global variable to act as a join between both scripts, and the use of a closure to overcome asyncronous issues. Note that I manipulate the button within reload, just to remark that sometimes it's not as easy as moving code outside in the global namespace:
Check it out here in jsFiddle: yay! this works!
And here's the code:
var intervalControl;
// main script
(function($){
$(function(){
var $playerButton = $('body').find('button.player'),
reload = function() {
console.log('reloading...');
$playerButton.css('top', parseInt($playerButton.css('top')) + 1);
};
var interval = function(callback) {
var timer,
playing = false;
this.play = function() {
if (! playing) {
timer = setInterval(callback, 2000);
playing = true;
}
};
this.pause = function() {
if (playing) {
clearInterval(timer);
playing = false;
}
};
this.play();
return this;
};
intervalControl = function() {
var timer = interval(reload);
return {
play: function() {
timer.play();
},
pause: function(){
timer.pause();
}
}
}
});
})(jQuery);
// Another script, available for specific users
(function($){
$(function(){
var $playerButton = $('body').find('button.player'),
$icon = $playerButton.children('i'),
interval;
buttonAction = function(e){
e.preventDefault();
if ($(this).hasClass('playing')) {
interval.pause();
$(this).removeClass('playing').addClass('paused');
$icon.removeClass('glyphicon-pause').addClass('glyphicon-play');
}
else {
interval.play();
$(this).removeClass('paused').addClass('playing');
$icon.removeClass('glyphicon-play').addClass('glyphicon-pause');
}
},
buttonInit = function() {
$playerButton.on('click', buttonAction);
interval = intervalControl();
};
buttonInit();
});
})(jQuery);
Any better suggestion is most welcome.
I've got a file which needs to run on page load (randomise_colors.js), but also needs to be called by another file as part of a callback function (in infinite_scroll.js). The randomise_colors script just loops through a list of posts on the page and assigns each one a color from an array which is used on the front-end.
Infinite Scroll loads new posts in to the DOM on a button click, but because the randomise_colors.js file has already ran on page load, new content loaded is not affected by this so I need it to run again. I'm open to other suggestions if it sounds like I could be tackling the problem in a different way, I'm no JS expert.
Currently I'm getting Uncaught ReferenceError: randomise_colours is not defined referring this line of infinite_scroll.js:
randomise_colours.init();
I'm calling all files that need be loaded on document.ready in app.js
require(['base/randomise-colours', 'base/infinite-scroll'],
function(randomise_colours, infinite_scroll) {
var $ = jQuery;
$(document).ready(function() {
infinite_scroll.init();
randomise_colours.init();
});
}
);
This is infinite_scroll.js which initialises Infinite Scroll and features the callback. The callback function runs whenever new items are loaded in via AJAX using the Infinite Scroll jQuery plugin. I've put asterix around the area where I need to run the randomise_colors.init() function from randomise_colors.js.
define(['infinitescroll'], function() {
var $ = jQuery,
$loadMore = $('.load-more-posts a');
function addClasses() {
**randomise_colours.init();**
};
return {
init: function() {
if($loadMore.length >= 1) {
this.setUp();
} else {
return false;
}
},
setUp: function() {
this.initInfiniteScroll();
},
initInfiniteScroll: function() {
$('.article-listing').infinitescroll({
navSelector : '.load-more-posts',
nextSelector : '.load-more-posts a',
itemSelector : '.standard-post'
}, function(newItems) {
addClasses();
});
//Unbind the standard scroll-load function
$(window).unbind('.infscr');
//Click handler to retrieve new posts
$loadMore.on('click', function() {
$('.article-listing').infinitescroll('retrieve');
return false;
});
}
};
});
And this is my randomise_colors.js file which runs fine on load, but needs to be re-called again after new content has loaded in.
define([], function() {
var $ = jQuery,
$colouredSlide = $('.image-overlay'),
colours = ['#e4cba3', '#867d75', '#e1ecb9', '#f5f08a'],
used = [];
function pickRandomColour() {
if(colours.length == 0) {
colours.push.apply(colours, used);
used = [];
}
var selected = colours[Math.floor(Math.random() * colours.length)];
var getSelectedIndex = colours.indexOf(selected);
colours.splice(getSelectedIndex, 1);
used.push(selected);
return selected;
};
return {
init: function() {
if($colouredSlide.length >= 1) {
this.setUp();
} else {
return false;
}
},
setUp: function() {
this.randomiseColours();
},
randomiseColours: function() {
console.log('randomise');
$colouredSlide.each(function() {
var newColour = pickRandomColour();
$(this).css('background', newColour);
});
}
};
});
You would have to reference randomiseColours inside the infiniteScroll file. So you need to change your define function to the following:
define(['infinitescroll', 'randomise-colours'], function(infiniteScroll, randomise_colours)
Remember that when using require you need to reference all variables through the define function, otherwise they will not be recognised.
This question already has answers here:
'console' is undefined error for Internet Explorer
(21 answers)
Closed 8 years ago.
Hi i found the problem in other stackoverflow questions , the problem is i have tried all solutions that should work, but i think im not understanding where and how to implement that fixes..
My problem is console.log in internet explorer throws an error as undefined. I search and found
Console undefined issue in IE8
Internet Explorer: "console is not defined" Error
I try to wrap the code inside the function using a condition like 'if(window.console) '
this dosent work i even try most of the recommended contitions no one work, try to insert the snnipet in the code so it worked, but it dont..
Im obviously not understanding how and where to put does fixes. Sorry for my ignorance. but im in a hurry, need to someone points at my stupidity
Thanks
var jcount = 0;
var scroll_count = 0;
var playflag=1;
var ajxcallimiter=0;
var hp_totalcount=parseInt($("#hp_totalcount").val());
if(hp_totalcount<5)
hp_totalcount=5;
function hlist_slider()
{
if($(".items img").eq(jcount).length != 0 && playflag==1){
firedstyle();
console.log(jcount);
$(".items img").eq(jcount).trigger("mouseover");
if(jcount % 5 === 0 && jcount!=0)
{
console.log('scroll');
api.next();
scroll_count++;
}
jcount++; // add to the counter
if(jcount>hp_totalcount)
{
if(playflag==1)
{
jcount = 0; //reset counter
while(scroll_count--)
{
api.prev();
}scroll_count=1;
}
}
}
else if(jcount<hp_totalcount && playflag==1)
{
playflag=0;homepagelist_nextclick();playflag=1;
}
else
{
if(playflag==1)
{
jcount = 0; //reset counter
while(scroll_count--)
{
api.prev();
}
scroll_count=1;
}
}
}
$(function() {
var root = $(".scrollable").scrollable({circular: false}).autoscroll({ autoplay: true });
hlist_slider();
setInterval(hlist_slider,10000);
// provide scrollable API for the action buttons
window.api = root.data("scrollable");
});
function firedstyle()
{
$(".items img").on("hover",function() {
// see if same thumb is being clicked
if ($(this).hasClass("active")) { return; }
// calclulate large image's URL based on the thumbnail URL (flickr specific)
var url = $(this).attr("src").replace("t_", "");
var tbtit = $(this).siblings('.tbtit').text();
var tbdesc = $(this).siblings('.tbdescp').text();
var tbtitgoto = $(this).attr("data");
// get handle to element that wraps the image and make it semi-transparent
var wrap = $("#image_wrap").stop(true, true).fadeTo("medium", 0.5);
// the large image from www.flickr.com
var img = new Image();
// call this function after it's loaded
img.onload = function() {
// make wrapper fully visible
wrap.fadeTo("fast", 1);
// change the image
wrap.find("img").attr("src", url);
wrap.find(".img-info h4").text(tbtit);
wrap.find(".img-info p").text( tbdesc);
wrap.find("a").attr("href", tbtitgoto);
};
// begin loading the image from www.flickr.com
img.src = url;
// activate item
$(".items img").removeClass("active");
$(this).addClass("active");
// when page loads simulate a "click" on the first image
}).filter(":first").trigger("mouseover");
}
function toggle(el){
if(el.className!="play")
{
playflag=0;
el.className="play";
el.src='images/play.png';
//api.pause();
}
else if(el.className=="play")
{
playflag=1;
el.className="pause";
el.src='images/pause.png';
// api.play();
}
return false;
}
function hp_nxtclick()
{
homepagelist_nextclick();
console.log('scroll');
if(api.next()){
scroll_count++;}
}
function homepagelist_nextclick()
{
var hp_totalcount=parseInt($("#hp_totalcount").val());
var hp_count=parseInt($("#hp_count").val());
if(hp_totalcount==0 || hp_count >=hp_totalcount)
return ;
if(ajxcallimiter==1)
return;
else
ajxcallimiter=1;
$.ajax(
{
type: "GET",
url: "<?php echo $makeurl."index/homepageslide/";?>"+hp_count,
success: function(msg)
{
hp_count=parseInt($("#hp_count").val())+parseInt(5);
$("#hp_count").val(hp_count);
$("#hp_list").append(msg);ajxcallimiter=0;
}
});
}
The problem is that the console (developer tool panel) needs to be active on page-load*.
Hit F12, reload your page, and you should get what you're looking for.
*Just to clarify: The developer panel needs to be open prior to window.console being called/tested. I'm assuming your code is being run on-load.
This should work:
if(!window.console || !window.console.log) window.console = {log: function(){}};
This way you will be able to use console.log without producing errors.
In my code, I put this snippet at the top - before any other javascript that might try to use the console loads:
if (window.console == null) {
window.console = {
log: function() {},
warn: function() {},
info: function() {},
error: function() {}
};
}
Or in coffeescript:
if not window.console?
window.console = {
log: () ->
warn: () ->
info: () ->
error: () ->
}
This provides a dummy console for browsers that don't include one.