Develop Reference

Jquery plugin is not working and causing console errors, how do I fix?

I installed Shuffle.js from a codepen demo with some customizations to style and figure cards. I've added in recommended js code but the shuffle function doesn't seem work.
Getting several errors:
console errors
I've tried updating script based on some past answers to this problem. I've also downloaded and added the actual js file on my site and referenced it in the script. Here's what my script looks like right now:
<script src="/v/vspfiles/assets/js/shuffle.js"></script>
<script>
'use strict';
var Shuffle = window.shuffle;
var Demo = function (element) {
this.element = element;
// Log out events.
this.addShuffleEventListeners();
this.shuffle = new Shuffle(element, {
itemSelector: '.picture-item',
sizer: element.querySelector('.my-sizer-element'),
});
this._activeFilters = [];
this.addFilterButtons();
this.addSorting();
this.addSearchFilter();
this.mode = 'exclusive';
};
Demo.prototype.toArray = function (arrayLike) {
return Array.prototype.slice.call(arrayLike);
};
Demo.prototype.toggleMode = function () {
if (this.mode === 'additive') {
this.mode = 'exclusive';
} else {
this.mode = 'additive';
}
};
/**
* Shuffle uses the CustomEvent constructor to dispatch events. You can listen
* for them like you normally would (with jQuery for example). The extra event
* data is in the `detail` property.
*/
Demo.prototype.addShuffleEventListeners = function () {
var handler = function (event) {
console.log('type: %s', event.type, 'detail:', event.detail);
};
this.element.addEventListener(Shuffle.EventType.LAYOUT, handler, false);
this.element.addEventListener(Shuffle.EventType.REMOVED, handler, false);
};
Demo.prototype.addFilterButtons = function () {
var options = document.querySelector('.filter-options');
if (!options) {
return;
}
var filterButtons = this.toArray(
options.children
);
filterButtons.forEach(function (button) {
button.addEventListener('click', this._handleFilterClick.bind(this), false);
}, this);
};
Demo.prototype._handleFilterClick = function (evt) {
var btn = evt.currentTarget;
var isActive = btn.classList.contains('active');
var btnGroup = btn.getAttribute('data-group');
// You don't need _both_ of these modes. This is only for the demo.
// For this custom 'additive' mode in the demo, clicking on filter buttons
// doesn't remove any other filters.
if (this.mode === 'additive') {
// If this button is already active, remove it from the list of filters.
if (isActive) {
this._activeFilters.splice(this._activeFilters.indexOf(btnGroup));
} else {
this._activeFilters.push(btnGroup);
}
btn.classList.toggle('active');
// Filter elements
this.shuffle.filter(this._activeFilters);
// 'exclusive' mode lets only one filter button be active at a time.
} else {
this._removeActiveClassFromChildren(btn.parentNode);
var filterGroup;
if (isActive) {
btn.classList.remove('active');
filterGroup = Shuffle.ALL_ITEMS;
} else {
btn.classList.add('active');
filterGroup = btnGroup;
}
this.shuffle.filter(filterGroup);
}
};
Demo.prototype._removeActiveClassFromChildren = function (parent) {
var children = parent.children;
for (var i = children.length - 1; i >= 0; i--) {
children[i].classList.remove('active');
}
};
Demo.prototype.addSorting = function () {
var menu = document.querySelector('.sort-options');
if (!menu) {
return;
}
menu.addEventListener('change', this._handleSortChange.bind(this));
};
Demo.prototype._handleSortChange = function (evt) {
var value = evt.target.value;
var options = {};
function sortByDate(element) {
return element.getAttribute('data-created');
}
function sortByTitle(element) {
return element.getAttribute('data-title').toLowerCase();
}
if (value === 'date-created') {
options = {
reverse: true,
by: sortByDate,
};
} else if (value === 'title') {
options = {
by: sortByTitle,
};
}
this.shuffle.sort(options);
};
// Advanced filtering
Demo.prototype.addSearchFilter = function () {
var searchInput = document.querySelector('.js-shuffle-search');
if (!searchInput) {
return;
}
searchInput.addEventListener('keyup', this._handleSearchKeyup.bind(this));
};
/**
* Filter the shuffle instance by items with a title that matches the search input.
* #param {Event} evt Event object.
*/
Demo.prototype._handleSearchKeyup = function (evt) {
var searchText = evt.target.value.toLowerCase();
this.shuffle.filter(function (element, shuffle) {
// If there is a current filter applied, ignore elements that don't match it.
if (shuffle.group !== Shuffle.ALL_ITEMS) {
// Get the item's groups.
var groups = JSON.parse(element.getAttribute('data-groups'));
var isElementInCurrentGroup = groups.indexOf(shuffle.group) !== -1;
// Only search elements in the current group
if (!isElementInCurrentGroup) {
return false;
}
}
var titleElement = element.querySelector('.picture-item__title');
var titleText = titleElement.textContent.toLowerCase().trim();
return titleText.indexOf(searchText) !== -1;
});
};
document.addEventListener('DOMContentLoaded', function () {
window.demo = new Demo(document.getElementById('grid'));
});
</script>
Any insight into what I need to remedy to get this working properly would be great. Thanks!

How to queue based preload images for browser to cache and use in other pages

I have been searching for all available solutions
This is the best so far i could find but it doesn't work as it should be
It works for first few images then stops. Then i refresh page, works for few more images and then stops again.
So basically what i want to achieve is, give like a 100 images to a function, it starts downloading them 1 by 1
So browser caches those images and those images are not downloaded on other pages and instantly displayed
I want this images to be cached on mobile as well
Here my javascript code that i call. Actually i have more than 100 images but didn't put all here
I accept both jquery and raw javascript solutions doesn't matter
(function() {
'use strict';
var preLoader = function(images, options) {
this.options = {
pipeline: true,
auto: true,
/* onProgress: function(){}, */
/* onError: function(){}, */
onComplete: function() {}
};
options && typeof options == 'object' && this.setOptions(options);
this.addQueue(images);
this.queue.length && this.options.auto && this.processQueue();
};
preLoader.prototype.setOptions = function(options) {
// shallow copy
var o = this.options,
key;
for (key in options) options.hasOwnProperty(key) && (o[key] = options[key]);
return this;
};
preLoader.prototype.addQueue = function(images) {
// stores a local array, dereferenced from original
this.queue = images.slice();
return this;
};
preLoader.prototype.reset = function() {
// reset the arrays
this.completed = [];
this.errors = [];
return this;
};
preLoader.prototype.load = function(src, index) {
console.log("downloading image " + src);
var image = new Image(),
self = this,
o = this.options;
// set some event handlers
image.onerror = image.onabort = function() {
this.onerror = this.onabort = this.onload = null;
self.errors.push(src);
o.onError && o.onError.call(self, src);
checkProgress.call(self, src);
o.pipeline && self.loadNext(index);
};
image.onload = function() {
this.onerror = this.onabort = this.onload = null;
// store progress. this === image
self.completed.push(src); // this.src may differ
checkProgress.call(self, src, this);
o.pipeline && self.loadNext(index);
};
// actually load
image.src = src;
return this;
};
preLoader.prototype.loadNext = function(index) {
// when pipeline loading is enabled, calls next item
index++;
this.queue[index] && this.load(this.queue[index], index);
return this;
};
preLoader.prototype.processQueue = function() {
// runs through all queued items.
var i = 0,
queue = this.queue,
len = queue.length;
// process all queue items
this.reset();
if (!this.options.pipeline)
for (; i < len; ++i) this.load(queue[i], i);
else this.load(queue[0], 0);
return this;
};
function checkProgress(src, image) {
// intermediate checker for queue remaining. not exported.
// called on preLoader instance as scope
var args = [],
o = this.options;
// call onProgress
o.onProgress && src && o.onProgress.call(this, src, image, this.completed.length);
if (this.completed.length + this.errors.length === this.queue.length) {
args.push(this.completed);
this.errors.length && args.push(this.errors);
o.onComplete.apply(this, args);
}
return this;
}
if (typeof define === 'function' && define.amd) {
// we have an AMD loader.
define(function() {
return preLoader;
});
} else {
this.preLoader = preLoader;
}
}).call(this);
// Usage:
$(window).load(function() {
new preLoader([
'//static.pokemonpets.com/images/attack_animations/absorb1.png',
'//static.pokemonpets.com/images/attack_animations/bleeding1.png',
'//static.pokemonpets.com/images/attack_animations/bug_attack1.png',
'//static.pokemonpets.com/images/attack_animations/bug_attack2.png',
'//static.pokemonpets.com/images/attack_animations/bug_boost1.png',
'//static.pokemonpets.com/images/attack_animations/burned1.png',
'//static.pokemonpets.com/images/attack_animations/change_weather_cloud.png',
'//static.pokemonpets.com/images/attack_animations/confused1.png',
'//static.pokemonpets.com/images/attack_animations/copy_all_enemy_moves.png',
'//static.pokemonpets.com/images/attack_animations/copy_last_move_enemy.png',
'//static.pokemonpets.com/images/attack_animations/cringed1.png',
'//static.pokemonpets.com/images/attack_animations/critical1.png',
'//static.pokemonpets.com/images/attack_animations/cure_all_status_problems.png',
'//static.pokemonpets.com/images/attack_animations/dark_attack1.png',
'//static.pokemonpets.com/images/attack_animations/dark_attack2.png',
'//static.pokemonpets.com/images/attack_animations/dark_attack3.png',
'//static.pokemonpets.com/images/attack_animations/dark_boost1.png',
'//static.pokemonpets.com/images/attack_animations/double_effect.png',
'//static.pokemonpets.com/images/attack_animations/dragon_attack1.png',
'//static.pokemonpets.com/images/attack_animations/dragon_attack2.png',
'//static.pokemonpets.com/images/attack_animations/dragon_attack3.png',
'//static.pokemonpets.com/images/attack_animations/dragon_attack4.png'
]);
});

Something like this?
I do not have time to make it pretty.
const pref = "https://static.pokemonpets.com/images/attack_animations/";
const defa = "https://imgplaceholder.com/20x20/000/fff/fa-image";
const images=['absorb1','bleeding1','bug_attack1','bug_attack2','bug_boost1','burned1','change_weather_cloud','confused1','copy_all_enemy_moves','copy_last_move_enemy','cringed1','critical1','cure_all_status_problems','dark_attack1','dark_attack2','dark_attack3','dark_boost1','double_effect','dragon_attack1','dragon_attack2','dragon_attack3','dragon_attack4'];
let cnt = 0;
function loadIt() {
if (cnt >= images.length) return;
$("#imagecontainer > img").eq(cnt).attr("src",pref+images[cnt]+".png"); // preload next
cnt++;
}
const $cont = $("#container");
const $icont = $("#imagecontainer");
// setting up test images
$.each(images,function(_,im) {
$cont.append('<img src="'+defa+'" id="'+im+'"/>'); // actual images
$icont.append('<img src="'+defa+'" data-id="'+im+'"/>'); // preload images
});
$("#imagecontainer > img").on("load",function() {
if (this.src.indexOf("imgplaceholder") ==-1) { // not for the default image
$("#"+$(this).attr("data-id")).attr("src",this.src); // copy preloaded
loadIt(); // run for next entry
}
})
loadIt(); // run
#imagecontainer img { height:20px }
#container img { height:100px }
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div id="container"></div>
<hr/>
<div id="imagecontainer"></div>

JavaScript + jQuery + Angular: Element is not found

I have a JavaScript function defined. Inside this function, I define variables of type jQuery elements. So, the variables refer to divs on the HTML. This function returns an object that has a single function init().
In the $(document).ready function, I call init() function.
The problem is when the script loads, the DOM is not ready and hence the variables referring to jQuery items are being set to undefined.
Later, I call the init() function inside Angular ngOnInit() to make sure things are well initialized, so nothing is happening as the variables above are undefined and they are not being re-calculated again.
Seems, when a function in JavaScript is defined, its body runs, and hence the variables are run and set to undefined as the HTML elements were not in the DOM yet.
How can I re-calculate the variables when init() runs? I cannot get my mind on this thing.
Thanks
var mQuickSidebar = function() {
var topbarAside = $('#m_quick_sidebar');
console.log('Function: ', Date.now());
var topbarAsideTabs = $('#m_quick_sidebar_tabs');
var topbarAsideClose = $('#m_quick_sidebar_close');
var topbarAsideToggle = $('#m_quick_sidebar_toggle');
var topbarAsideContent = topbarAside.find('.m-quick-sidebar__content');
var initMessages = function() {
var messenger = $('#m_quick_sidebar_tabs_messenger');
if (messenger.length === 0) {
return;
}
var messengerMessages = messenger.find('.m-messenger__messages');
var init = function() {
var height = topbarAside.outerHeight(true) -
topbarAsideTabs.outerHeight(true) -
messenger.find('.m-messenger__form').outerHeight(true) - 120;
// init messages scrollable content
messengerMessages.css('height', height);
mApp.initScroller(messengerMessages, {});
}
init();
// reinit on window resize
mUtil.addResizeHandler(init);
}
var initSettings = function() {
var settings = $('#m_quick_sidebar_tabs_settings');
if (settings.length === 0) {
return;
}
// init dropdown tabbable content
var init = function() {
var height = mUtil.getViewPort().height - topbarAsideTabs.outerHeight(true) - 60;
// init settings scrollable content
settings.css('height', height);
mApp.initScroller(settings, {});
}
init();
// reinit on window resize
mUtil.addResizeHandler(init);
}
var initLogs = function() {
// init dropdown tabbable content
var logs = $('#m_quick_sidebar_tabs_logs');
if (logs.length === 0) {
return;
}
var init = function() {
var height = mUtil.getViewPort().height - topbarAsideTabs.outerHeight(true) - 60;
// init settings scrollable content
logs.css('height', height);
mApp.initScroller(logs, {});
}
init();
// reinit on window resize
mUtil.addResizeHandler(init);
}
var initOffcanvasTabs = function() {
initMessages();
initSettings();
initLogs();
}
var initOffcanvas = function() {
topbarAside.mOffcanvas({
class: 'm-quick-sidebar',
overlay: true,
close: topbarAsideClose,
toggle: topbarAsideToggle
});
// run once on first time dropdown shown
topbarAside.mOffcanvas().one('afterShow', function() {
mApp.block(topbarAside);
setTimeout(function() {
mApp.unblock(topbarAside);
topbarAsideContent.removeClass('m--hide');
initOffcanvasTabs();
}, 1000);
});
}
return {
init: function() {
console.log('Inside Init(): ', Date.now());
console.log($('#m_quick_sidebar')); // topbarAside is undefined here!
if (topbarAside.length === 0) {
return;
}
initOffcanvas();
}
}; }();
$(document).ready(function() {
console.log('document.ready: ', Date.now());
mQuickSidebar.init();
});

The problem is that you immediately invoke your function mQuickSidebar not
Seems, when a function in JavaScript is defined, its body runs
var mQuickSidebar = function() {
var topbarAside = $('#m_quick_sidebar');
console.log('Function: ', Date.now());
var topbarAsideTabs = $('#m_quick_sidebar_tabs');
var topbarAsideClose = $('#m_quick_sidebar_close');
var topbarAsideToggle = $('#m_quick_sidebar_toggle');
var topbarAsideContent = topbarAside.find('.m-quick-sidebar__content');
...
}(); // <---- this runs the function immediately
So those var declarations are run and since the DOM is not ready those selectors don't find anything. I'm actually surprised that it does not throw a $ undefined error of some sort
This looks like a broken implementation of The Module Pattern
I re-wrote your code in the Module Pattern. The changes are small. Keep in mind that everything declared inside the IIFE as a var are private and cannot be accessed through mQuickSidebar. Only the init function of mQuickSidebar is public. I did not know what you needed to be public or private. If you need further clarity just ask.
As a Module
var mQuickSidebar = (function(mUtil, mApp, $) {
console.log('Function: ', Date.now());
var topbarAside;
var topbarAsideTabs;
var topbarAsideClose;
var topbarAsideToggle;
var topbarAsideContent;
var initMessages = function() {
var messenger = $('#m_quick_sidebar_tabs_messenger');
if (messenger.length === 0) {
return;
}
var messengerMessages = messenger.find('.m-messenger__messages');
var init = function() {
var height = topbarAside.outerHeight(true) -
topbarAsideTabs.outerHeight(true) -
messenger.find('.m-messenger__form').outerHeight(true) - 120;
// init messages scrollable content
messengerMessages.css('height', height);
mApp.initScroller(messengerMessages, {});
};
init();
// reinit on window resize
mUtil.addResizeHandler(init);
};
var initSettings = function() {
var settings = $('#m_quick_sidebar_tabs_settings');
if (settings.length === 0) {
return;
}
// init dropdown tabbable content
var init = function() {
var height = mUtil.getViewPort().height - topbarAsideTabs.outerHeight(true) - 60;
// init settings scrollable content
settings.css('height', height);
mApp.initScroller(settings, {});
};
init();
// reinit on window resize
mUtil.addResizeHandler(init);
};
var initLogs = function() {
// init dropdown tabbable content
var logs = $('#m_quick_sidebar_tabs_logs');
if (logs.length === 0) {
return;
}
var init = function() {
var height = mUtil.getViewPort().height - topbarAsideTabs.outerHeight(true) - 60;
// init settings scrollable content
logs.css('height', height);
mApp.initScroller(logs, {});
};
init();
// reinit on window resize
mUtil.addResizeHandler(init);
};
var initOffcanvasTabs = function() {
initMessages();
initSettings();
initLogs();
};
var initOffcanvas = function() {
topbarAside.mOffcanvas({
class: 'm-quick-sidebar',
overlay: true,
close: topbarAsideClose,
toggle: topbarAsideToggle
});
// run once on first time dropdown shown
topbarAside.mOffcanvas().one('afterShow', function() {
mApp.block(topbarAside);
setTimeout(function() {
mApp.unblock(topbarAside);
topbarAsideContent.removeClass('m--hide');
initOffcanvasTabs();
}, 1000);
});
};
return {
init: function() {
console.log('Inside Init(): ', Date.now());
console.log($('#m_quick_sidebar')); // topbarAside is undefined here!
topbarAside = $('#m_quick_sidebar');
topbarAsideTabs = $('#m_quick_sidebar_tabs');
topbarAsideClose = $('#m_quick_sidebar_close');
topbarAsideToggle = $('#m_quick_sidebar_toggle');
topbarAsideContent = topbarAside.find('.m-quick-sidebar__content');
if (topbarAside.length === 0) {
return;
}
initOffcanvas();
}
};
})(mUtil, mApp, $);
$(document).ready(function() {
console.log('document.ready: ', Date.now());
mQuickSidebar.init();
});

caret positionning in contentEditable containing dom images

I'm having problems with setting caret position in a contentEditable iframe, as soon as I add an ":)" emoticon.
How would you manage?
Here is a basic template:
<!DOCTYPE html>
<html>
<head>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
<script type="text/javascript">
var init = function () { // initialization
this.editor = $('#wysiwyg');
this.editor.curWin = this.editor.prop('contentWindow');
this.editor.curDoc = this.editor.curWin.document;
this.editor.curDoc.designMode = "On";
this.editor.curBody = $(this.curDoc).contents().find('body');
this.editor.html = function (data) { // shortcut to set innerHTML
if (typeof data == "undefined")
return this.curBody.html();
this.curBody.html(data);
return $(this);
};
var emoji = function (data) { // replace every :) by an image
return data.replace(':)', '<img src="http:\/\/dean.resplace.net\/blog\/wp-content\/uploads\/2011\/10\/wlEmoticon-smile1.png"\/>');
};
var self = this;
this.editor.contents().find('body').keypress(function (ev) { // handler on key pressed
var me = $(this);
setTimeout(function () { // timeout so that the iframe is containing the last character inputed
var sel = self.editor.curWin.getSelection();
var offset = sel.focusOffset;
me.html( emoji( me.html() ) );
var body = $(self.editor.curDoc).find('body').get(0);
sel.collapse(body, offset); //here is where i set positionning
return;
}, 100);
return true;
});
};
</script>
</head>
<body onload="init()">
<iframe id="wysiwyg"></iframe>
</body>
</html>
StackOverflow demands that i add more context to explain the code sections, but for me it seems to be clear. So sorry to add so more "cool story bro" comments but i can't see what i can explain more than this. Anyway, i'm open to any question.

Quick fix...
check to see if a replacement is being made... if there is one being made then readjust the caret. otherwise leave it be.
var init = function() { // initialization
this.editor = $('#wysiwyg');
this.editor.curWin = this.editor.prop('contentWindow');
this.editor.curDoc = this.editor.curWin.document;
this.editor.curDoc.designMode = "On";
this.editor.curBody = $(this.curDoc).contents().find('body');
this.editor.html = function(data) { // shortcut to set innerHTML
if (typeof data == "undefined") return this.curBody.html();
this.curBody.html(data);
return $(this);
};
var emoji = function(data) { // replace every :) by an image
var tmp = data;
tmp = tmp.replace(':)', '<img src="http:\/\/dean.resplace.net\/blog\/wp-content\/uploads\/2011\/10\/wlEmoticon-smile1.png"\/>');
if (tmp !== data) {
return [true, tmp];
}
return [false, tmp];
};
var self = this;
this.editor.contents().find('body').keypress(function(ev) { // handler on key pressed
var me = $(this);
var res = emoji(me.html());
if (res[0]) {
setTimeout(function() { // timeout so that the iframe is containing the last character inputed
var sel = self.editor.curWin.getSelection();
var offset = sel.focusOffset;
me.html(res[1]);
var body = $(self.editor.curDoc).find('body').get(0);
sel.collapse(body, offset); //here is where i set positionning
return;
}, 100);
}
return true;
});
};
init();​

changing url of iframe every 20 sec not working with javascript

I have an iframe that I wanna update every 20 seconds. So basically, the url of the iframe should change to a new one from the array and it refreshes, every 20 seconds but my code doesn't seem to work.
var Uni = {
init: function () {
this.refresh();
},
refresh: function () {
var urlArr = [
'http://www.smashingmagazine.com/learning-javascript-essentials-guidelines-tutorials/',
'http://stephendnicholas.com/archives/310',
'http://msdn.microsoft.com/en-us/scriptjunkie/ff696765',
'http://www.jquery4u.com/jquery-functions/jquery-each-examples/'
],
iframeSrc = document.querySelector('#uni iframe').src;
for (var i = 0, max = urlArr.length; i < max; i++) {
setInterval(function(){
iframeSrc = urlArr[i];
}, 20000);
}
}
}
Uni.init();
HTML:
<body id="uni">
<iframe src="http://www.smashingmagazine.com/learning-javascript-essentials-guidelines-tutorials/">
You browser doesn't support iframes, please update it.
</iframe>
</body>
Please help.

Check the last line of your urlArr[] declaration:
], // <- the comma should be a semicolon!
Thanks to #AndyE for the hint.
Update: Solution + working fiddle
var Uni = {
interval_holder : false,
urlArr : [],
init: function (args) {
if (args) {
for (url in args) { this.addUrl(args[url]); }
};
this.refresh();
this.interval_holder = setInterval('myuni.refresh()', 20000);
return this;
},
refresh: function () {
iframeObj = document.querySelector('#uni iframe');
this.urlArr.unshift(iframeObj.src);
iframeObj.src = this.urlArr.pop();
return this;
},
stop : function () {
clearInterval(this.interval_holder);
return this;
},
addUrl : function(url) {
this.urlArr.push(url);
return this;
},
removeUrl : function(url) {
this.urlArr.splice(this.urlArr.indexOf(url),1);
return this;
}
};
window.myuni = Uni.init([
'http://www.smashingmagazine.com/learning-javascript-essentials-guidelines-tutorials/',
'http://stephendnicholas.com/archives/310',
'http://msdn.microsoft.com/en-us/scriptjunkie/ff696765',
'http://www.jquery4u.com/jquery-functions/jquery-each-examples/'
]);

The iframe src attribute is only a string, not pointer. Changing it has no effect.
Have this instead:
iframeObj = document.querySelector('#uni iframe');
for (var i = 0, max = urlArr.length; i < max; i++) {
setInterval(function(){
iframeObj.src = urlArr[i];
}, 20000);
}