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How to fix onload function with Conditional If and else

My problem here is the fact that I don't know how to do the if statement. for onload page I want when the id is #lang_link\[fr\] directly run function ParseJSON1 and when my id #lang_link\[en\] run function ParseJSON2
I want to fix this:
window.onload = function runAtLoadTime() {
if(document.getElementsById('#lang_link\\[fr\\]').value = 'fr' ){
ParseJSON1();
}
else
{
ParseJSON2();
}
}
to call:
$(document).ready(function (){
$('#lang_link\\[fr\\]').click(function (){
ParseJSON1('fr');
});
$('#lang_link\\[en\\]').click(function (){
ParseJSON2('en');
});
});
code to run:
function ParseJSON1() {
var JSONObject = {
"footerboutiques": "Sourav french",
"boutiquelink": "https://www.w3schools.com/js/js_loop_for.asp",
"footerrestaurants": "Kayal",
"Restaurantslink": "https://www.w3schools.com/js/js_loop_for.asp",
"footeracces": 24,
"acceslink": "https://www.w3schools.com/js/js_loop_for.asp",
"footeraerogare": "123456" ,
"aerogarelink": "https://www.w3schools.com/js/js_loop_for.asp",
};
var Value = eval(JSONObject);
document.getElementById("footerboutiques").innerHTML = Value.footerboutiques;
document.getElementById("boutiquelink").href = Value.boutiquelink;
document.getElementById("footerrestaurants").innerHTML = Value.footerrestaurants;
document.getElementById("Restaurantslink").href = Value.Restaurantslink;
document.getElementById("footeracces").innerHTML = Value.footeracces;
document.getElementById("acceslink").href = Value.acceslink;
document.getElementById("footeraerogare").innerHTML = Value.footeraerogare;
document.getElementById("aerogarelink").href = Value.aerogarelink;
}
function ParseJSON2() {
var JSONObject = {
"footerboutiques": "Sourav2 english",
"boutiquelink": "https://developer.mozilla.org/fr/docs/Web/API/Document/getElementById",
"footerrestaurants": "Kayal2",
"Restaurantslink": "https://developer.mozilla.org/fr/docs/Web/API/Document/getElementById",
"footeracces": 242,
"acceslink": "https://developer.mozilla.org/fr/docs/Web/API/Document/getElementById",
"footeraerogare": "1234562" ,
"aerogarelink": "https://developer.mozilla.org/fr/docs/Web/API/Document/getElementById",
};
var Value = eval(JSONObject);
document.getElementById("footerboutiques").innerHTML = Value.footerboutiques;
document.getElementById("boutiquelink").href = Value.boutiquelink;
document.getElementById("footerrestaurants").innerHTML = Value.footerrestaurants;
document.getElementById("Restaurantslink").href = Value.Restaurantslink;
document.getElementById("footeracces").innerHTML = Value.footeracces;
document.getElementById("acceslink").href = Value.acceslink;
document.getElementById("footeraerogare").innerHTML = Value.footeraerogare ;
document.getElementById("aerogarelink").href = Value.aerogarelink;
}

javascript DOM object (window) extended property is null on page reload after being idle

I have a custom extended property attached to the window object in JavaScript as follows:
Community.js
(function (window, document, $) {
'use strict';
var containerScrollPositionOnHideList = [];
var scrollToTopOnShowContainerList = [];
var userProfileInfo = {};
window.Community = $.extend({
//init
init: function () {
var Site = window.Site;
Site.run();
this.enableHideShowEventTrigger();
},
setUserInfo: function (userObj) {
if (UtilModule.allowDebug) { debugger; }
window.localStorage.setItem('userInfo', JSON.stringify(userObj));
var d = new $.Deferred();
$.when(this.initUserProfile(userObj.UserId)).done(function () {
d.resolve("ok");
});
},
getUserInfo: function () {
var userJson = window.localStorage.getItem('userInfo');
var userObj = JSON.parse(userJson);
return userObj;
},
})(window, document, jQuery);
The problem is that this extension property window.Community is null in certian scenarios when i refresh the page which i am going to describe below along with flow of code.
and here is a module in JavaScript to force reload scripts even if they are cached every time the page is refreshed as my code heavily depends on javascript calls so I just enabled it to make sure while I am still writing the code page reloads every time, the code is below as follows:
Util.js
var UtilModule = (function () {
var allowDebug = false;
var currentVersion = 0;
var properlyLoadScript = function (scriptPath, callBackAfterLoadScript) {
//get the number of `<script>` elements that have the correct `src` attribute
//debugger;
var d = $.Deferred();
$('script').each(function () {
console.log($(this).attr('src'));
});
if (typeof window.Community == 'undefined') {
//debugger;
console.log('community was undefined till this point');
//the flag was not found, so the code has not run
$.when(forceReloadScript(scriptPath)).done(function () {
callBackAfterLoadScript();
d.resolve("ok");
});
}
else {
console.log('Community loaded already and running now : ' + scriptPath);
callBackAfterLoadScript();
}
return d.promise();
};
var forceReloadScript = function (scriptPath) {
if (UtilModule.allowDebug) { debugger; }
var d = $.Deferred();
initCurrentVersion();
var JSLink = scriptPath + "?version=" + currentVersion;
var JSElement = document.createElement('script');
JSElement.src = JSLink;
JSElement.onload = customCallBack;
document.getElementsByTagName('head')[0].appendChild(JSElement);
function customCallBack() {
d.resolve("ok");
}
return d.promise();
};
var enableDebugger = function () {
allowDebug = true;
};
var disableDebugger = function () {
allowDebug = false;
};
var debugBreakPoint = function () {
if (allowDebug) {
}
};
var initCurrentVersion = function () {
if (currentVersion == 0) {
var dt = new Date();
var ttime = dt.getTime();
currentVersion = ttime;
}
};
var getCurrentVersion = function () {
return currentVersion;
};
return {
forceReloadScript,
properlyLoadScript,
enableDebugger,
disableDebugger,
debugBreakPoint,
allowDebug,
getCurrentVersion
};
})();
Note: I have made deferred objects to resolve only when the JSElement.onload has been called successfully. This step was taken just for testing purpose to make sure that I am not missing something before reaching a point to call the method where I am getting an error.
After that the code where I load scripts using UtilModule in my layout file look like as below:
_Layout.cshtml
<script src = "~/Scripts/Application/Modules/Util.js" ></script>
<script>
$.when(
UtilModule.properlyLoadScript('/Scripts/Application/Community.js', () => {
// Community.init() was supposed to be called here but i was still getting the error so i implemented this using promise that is returned from properlyLoadScript and call Community.init() further in .done callback to make sure that script is properly loading till this point.
//window.Community.init();
})
).done(function() {
window.Community.init();
});
</script>
#RenderSection("scripts", required: false)
Now coming to my main file where My index file is executing having (_layout.chsmtl) as parent layout
is
Index.cshtml
#{
ViewBag.Title = "My Blog";
Layout = "~/Views/Shared/_Layout.cshtml";
}
<article id="BlogPage" style="margin: 5px;">
</article>
#section scripts{
<script type="text/javascript">
$(document).ready(function () {
$.when(UtilModule.properlyLoadScript('/Scripts/Application/Modules/Blog.js', () => {
})).done(function () {
BlogModule.init();
});
});
//});
</script>
}
from what I know is that #section scripts is executed only once all the scripts in the layout page are loaded first so seems like a safe place to initialize the code which is dependent on some script in _Layout.HTML file and further enclosed with $(document).ready() for testing just to make sure that this script loads after everything else is loaded already.
Note: I am running all this code in in-cognito mode in chrome so nothing is cached while this code is running
now my Blog.js file looks like as below
var BlogModule = (function () {
var moduleReference = this;
var PageId = "#BlogPage ";
var currentUser;
var BlogPostList = [];
var blogPostInfo = {};
//init
var init = function () {
if (UtilModule.allowDebug) { debugger; }
//This is where the problem happens
console.log(window.Community);
console.log(window.Community.getUserInfo());
currentUser = window.Community.getUserInfo();
initBlogInformation();
//window.Community.registerModule(BlogModule);
if (Object.keys(window.Community.getUserProfileObject()) <= 0) {
$.when(window.Community.initUserProfile(currentUser.UserId)).then(function () {
$.when(initBlogInformation()).done(function () {
//debugger;
console.log(BlogPostList);
window.WidgetManager.populateWidget(PageId, moduleReference);
loadBlogPostWidget();
loadBlogViewWidget();
loadBlogCommentsWidget();
});
});
}
else {
$.when(initBlogInformation()).done(function () {
window.WidgetManager.populateWidget(PageId, moduleReference);
loadBlogPostWidget();
loadBlogViewWidget();
loadBlogCommentsWidget();
});
}
};
var loadBlogIndexMenuWidget = function () {
if (UtilModule.allowDebug) { debugger; }
};
var loadBlogPostWidget = function () {
var widgetOptions = {};
widgetOptions.type = "BlogPostWidget";
widgetOptions.container = PageId + "#BlogPostWidgetContainer";
var settings = {};
settings.UserId = 1;
widgetOptions.settings = settings;
window.WidgetManager.loadWidget(widgetOptions);
}
var loadBlogViewWidget = function () {
var widgetOptions = {};
widgetOptions.type = "BlogViewWidget";
widgetOptions.container = PageId + "#BlogViewWidgetContainer";
var settings = {};
settings.UserId = 1;
widgetOptions.settings = settings;
window.WidgetManager.loadWidget(widgetOptions);
};
var loadBlogCommentsWidget = function () {
var widgetOptions = {};
widgetOptions.type = "BlogCommentsWidget";
widgetOptions.container = PageId + "#BlogCommentsWidgetContainer";
var settings = {};
settings.UserId = 1;
widgetOptions.settings = settings;
window.WidgetManager.loadWidget(widgetOptions);
};
var initBlogList = function () {
$.when(getBlogPosts()).then(function (results) {
if (UtilModule.allowDebug) { debugger; }
BlogPostList = results.Record;
console.log(BlogPostList);
});
};
var getBlogPosts = function () {
if (UtilModule.allowDebug) { debugger; }
var d = new $.Deferred();
var uri = '/Blog/GetBlogPosts?userId=' + currentUser.UserId;
$.post(uri).done(function (returnData) {
if (UtilModule.allowDebug) { debugger; }
if (returnData.Status == "OK") {
BlogPostList = returnData.Record;
BlogPostList.map(x => {
if (UtilModule.allowDebug) { debugger; }
x.UserName = window.Community.getUserProfileObject().UserName;
if (x.Comments != null) {
x.CommentsObject = JSON.parse(x.Comments);
x.CommentsCount = x.CommentsObject.length;
}
});
console.log(returnData.Record);
d.resolve("ok");
} else {
window.Community.showNotification("Error", returnData.Record, "error");
d.resolve("error");
}
});
return d.promise();
};
var initBlogInformation = function () {
//debugger;
var d = $.Deferred();
getBlogPosts().then(getBlogModelTemplate()).then(function () {
d.resolve("ok");
});
return d.promise();
};
//Get Blog Model
var getBlogModelTemplate = function () {
var d = new $.Deferred();
var uri = '/Blog/GetBlogModel';
$.post(uri).done(function (returnData) {
blogPostInfo = returnData.Record;
d.resolve("ok");
});
return d.promise();
};
return {
init: init,
};
})();
The error I have highlighted below
so the problem is in init function of BlogModule which is BlogModule.init() the page is idle for too long and I reload it I get the following error:
cannot call
window.Community.getUserInfo() of undefined implying that community is undefied
after couple of refreshes its fine and the issue doesn't happen unless I change reasonable portion of code for js files to be recompiled again by browser or the browser is idle for too long and I am not able to understand what is triggering this issue.
below is log from console
p.s. error occurs more repeatedly if i refresh page with f5 but happens rarely if i refresh page with ctrl + f5
Please any help would be of great value

Answering my own question, took a while to figure it out but it was a small mistake on my end just fixing the following function in Util.js fixed it for me
var properlyLoadScript = function(scriptPath, callBackAfterLoadScript) {
//get the number of `<script>` elements that have the correct `src` attribute
//debugger;
var d = $.Deferred();
$('script').each(function() {
console.log($(this).attr('src'));
});
if (typeof window.Community == 'undefined') {
//debugger;
console.log('community was undefined till this point');
//the flag was not found, so the code has not run
$.when(forceReloadScript('/Scripts/Application/Community.js')).done(function() {
//debugger;
$.when(forceReloadScript(scriptPath)).done(function() {
callBackAfterLoadScript();
});
d.resolve("ok");
});
} else {
console.log('Community loaded already and running now : ' + scriptPath);
$.when(forceReloadScript(scriptPath)).done(function() {
callBackAfterLoadScript();
});
}
return d.promise();
};

reaching the btn event outside the revealing patterned applied class

I have an revealing patterned applied class.How can I reach btnMenu event outside of the model
thanks.
MyModel= (function () {
var btnClickEvents = function () {
var btnMenu = $('.btnMenu').on('click', function () {
var date= $(this).attr("data-rezerve-date");
var statu= $(this).attr("data-rezerve-statu");
alert("click"+date+'---'+statu);
});
};
return {
initialize: initialize,
asignValues: asignValues,
getRezervationDateAndStatus: btnClickEvents.btnMenu//how can I reach this function outside of model
};
})();
update
I change my code as u show.and add one return function
MyModel = (function () {
var dt = "";
var statu = "";
var rvalue = {};
var btnClickEvents = function () {
$('.btnMenu').on('click', onBtnMenuClick);
};
function onBtnMenuClick(e) {
dt = $(this).attr("data-rezerve-date");
statu = $(this).attr("data-rezerve-statu");
rvalue.date = dt;
rvalue.statu = statu;
console.log(dt);
}
var getRezervationDateAndStatus = function () {
return rvalue;
};
return {
initialize: initialize,
asignValues: asignValues,
getRezervationDateAndStatus: getRezervationDateAndStatus
};
})();
and after include my module to my web page calling is like this,
MyModel.asignValues(rezervasyonTable,data);
MyModel.initialize();
var result = MyModel.getRezervationDateAndStatus();
console.log(result.date);
bu console log empty.

As you say it is a " revealing" pattern. You could see what you expose. To be able to use this function outside of the module change your code like this:
MyModel = (function () {
var btnClickEvents = function () {
$('.btnMenu').on('click', onBtnMenuClick);
};
function onBtnMenuClick(e) {
var date = $(this).attr("data-rezerve-date");
var statu = $(this).attr("data-rezerve-statu");
alert("click" + date + '---' + statu);
}
return {
initialize: initialize,
asignValues: asignValues,
getRezervationDateAndStatus: onBtnMenuClick
};
})();

javascript: How to reference a class from event

I have a class like this
var grid = function () {
this.cell = null;
this.loadImage = function () {
var image = new Image();
var object = this;
image.src = "blah";
$(image).load(function () {
object.cell = this;
});
}
this.showImage = function () {
alert(object.cell); // This should print [object Object] ... but it print null;
}
}
The showImage function is called after the image called loaded from loadImage function.
Does anyone know why object.cell is null... I have reference to this object in loadImage.

object is undefined in showImage.

This is what I think you should be doing:
var grid = function () {
this.cell = null;
this.loadImage = function () {
var image = new Image();
image.addEventListener("load", (function (obj) {
return function () {
obj.cell = this;
};
})(this));
image.src = "http://upload.wikimedia.org/wikipedia/commons/8/84/Example.svg";
}
this.showImage = function () {
alert(this.cell);
}
}

JavaScript singleton patterns - differences?

This may seem like a silly question, but what are the functional differences, if any, between these two patterns? Is there no real functional difference and it's just a matter of organization preference? What are some instances when you would want to use one and not the other? I'm trying to find a design pattern I feel most comfortable with. Thanks!
$(function(){
Core.init();
});
var Core = {
init: function() {
//some initialization code here
}
_plugins: function() {
//instantiate some plugins here
}
_display: function() {
//some more code here
}
_otherfunctions: function() {
....
}
}
and
$(function(){
Core.init();
Plugins.init();
Display.init();
});
var Core = {
init: function() {
//some initialization code here
}
}
var Plugins = {
init: function() {
//start plugins
}
_modify: function() {
//more code
}
}
var Display = {
init: function() {
//some init code
}
}

The main organizational difference is that the first pattern pollutes the global namespace less.
If you do want to separate your code into packages like in the second example, then the better way, within your example, would be:
$(function(){
Core.init();
});
var Core = {
init: function() {
//some initialization code here
},
plugins: {
init: function() {
//start plugins
}
_modify: function() {
//more code
}
},
display: {
init: function() {
//some init code
}
}
}
and refer to the packages through your main namespace:
Core.plugins.init();
I am not saying that this is the best way to do so in general (some of it is a matter of preference, like private members and methods), but in your example - I'd prefer mine.

Have a look at this framework I have built. Seems to work pretty well.
var gtg = gtg || {};
(function () {
var _this = this;
this.registerNamespace = function (namespace) {
var root = window,
parts = namespace.split("."),
i;
for (i = 0; i < parts.length; i++) {
if (typeof root[parts[i]] === "undefined") {
root[parts[i]] = {};
}
root = root[parts[i]];
}
return this;
};
}).call(gtg);
// Register Namespaces
gtg.registerNamespace("gtg.core");
gtg.registerNamespace("gtg.infoBar");
gtg.registerNamespace("gtg.navBar");
gtg.registerNamespace("gtg.tabBar");
gtg.registerNamespace("gtg.utils");
(function () {
var _this = this;
this.initialize = function () { };
}).call(gtg.core);
(function () {
var _this = this,
$container,
$messageContainer,
$message;
function configureMessage(message) {
var className = "info",
types = ["error", "info", "warning"];
for (var i in types) {
$message.removeClass(types[i]);
}
switch (message.MessageType) {
case 0:
className = "error"
break;
case 1:
className = "info"
break;
case 2:
className = "warning"
break;
}
$message.addClass(className).html(message.Message);
}
this.initialize = function () {
$container = $(".info-bar-container");
$messageContainer = $container.find(".message-container");
$message = $messageContainer.find(".message");
$messageContainer.find(".close a").bind("click", function () {
_this.close();
});
};
this.close = function () {
$messageContainer.fadeOut(300, function () {
$container.slideUp(300);
});
};
this.show = function (message) {
if ($container.css("display") !== "none") {
$messageContainer.fadeOut(300, function () {
configureMessage(message);
$messageContainer.fadeIn(300);
});
} else {
$container.slideDown(300, function () {
configureMessage(message);
$messageContainer.fadeIn(300);
});
}
};
}).call(gtg.infoBar);
(function () {
var _this = this;
function initializeNavBar() {
var paths = window.location.pathname.split("/"),
navId;
$("#nav-bar ul.top-nav li a[data-nav]").bind("click", function () {
_this.switchNav($(this));
});
if (paths[1] != "") {
switch (paths[1]) {
case "Customer":
navId = "customers-nav";
break;
case "Order":
navId = "orders-nav";
break;
case "Product":
navId = "products-nav";
break;
case "Report":
navId = "reports-nav";
break;
case "Tool":
navId = "tools-nav";
break;
}
if (navId != "") {
_this.switchNav($('#nav-bar ul.top-nav li a[data-nav="' + navId + '"]'));
}
} else {
_this.switchNav($('#nav-bar ul.top-nav li a[data-nav="home-nav"]'));
}
}
this.initialize = function () {
initializeNavBar();
};
this.switchNav = function (navItem) {
$("#nav-bar ul.top-nav li a[data-nav]").each(function (i) {
$(this).removeClass("selected");
$("#" + $(this).data("nav")).hide();
});
navItem.addClass("selected");
$("#" + navItem.data("nav")).show();
};
}).call(gtg.navBar);
(function () {
var _this = this;
this.initialize = function () {
$(".tab-bar ul li a[data-tab-panel]").bind("click", function () {
_this.switchTab($(this));
});
};
this.switchTab = function (tab) {
$(".tab-bar ul li a[data-tab-panel]").each(function (i) {
$(this).removeClass("selected");
$("#" + $(this).data("tab-panel")).hide();
});
tab.addClass("selected");
$("#" + tab.data("tab-panel")).show();
};
}).call(gtg.tabBar);
(function () {
var _this = this;
this.focusField = function (fieldId) {
$("#" + fieldId).select().focus();
};
this.loadJQTemplate = function (templateName, callback) {
$.get("/Content/JQTemplates/" + templateName + ".html", function (template) {
callback(template);
});
};
}).call(gtg.utils);
$(document).ready(function () {
gtg.core.initialize();
gtg.infoBar.initialize();
gtg.navBar.initialize();
gtg.tabBar.initialize();
});