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  • What (kind of) project could I create to learn JavaScript?

    - by Aziz Light
    Hello, I started learning JavaScript a while ago. It's a fairly easy programming language considering that I learned Java in university, that I know php pretty well and that I already played around with python and ruby. The problem is that to properly learn a programming language I usually create a project. In javascript, I just don't know what kind of project I could create - that is, a project that is not web-based or related to the web browser. Can I create javascript shell scripts? Where is javascript commonly used beside the web browsers? So, can someone actually give me some ideas please?

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  • Javascript How to automatically change word when click without need to refresh browser.?

    - by Fakhrul Zakry
    im quite lost here and not really expert about javascript. I want to change the content when user click with "Thanks for vote" automatically without need to refresh the page. Here is my html: {% if poll.privacy == "own" and request.user.get_profile.parliment != poll.location %} You do not have permission to vote this. {% else %} {% if has_vote %} {% if poll.rating_option == '1to5' %} <div class="rate"> <div id="poll-rate-{{ poll.pk }}"></div> </div> {% else %} Thanks for your vote. {% endif %} {% else %} {% if poll.rating_option == 'yes_no' %} <a href="javascript:void(0)" class="rate btn btn-xs btn-success mr5 vote-positive" rel="{% url 'vote_vote' poll.pk 1 %}" alt="{{ poll.pk }}">Yes</a> <a href="javascript:void(0)" class="rate btn btn-xs btn-danger vote-negative" rel="{% url 'vote_vote' poll.pk 0 %}" alt="{{ poll.pk }}">No</a> {% elif poll.rating_option == 'like_dislike' %} <a href="javascript:void(0)" class="rate btn btn-xs btn-success mr5 vote-positive" rel="{% url 'vote_vote' poll.pk 1 %}" alt="{{ poll.pk }}">Like</a> <a href="javascript:void(0)" class="rate btn btn-xs btn-danger vote-negative" rel="{% url 'vote_vote' poll.pk 0 %}" alt="{{ poll.pk }}">Dislike</a> {% elif poll.rating_option == '1to5' %} <div class="rate"> <div id="poll-rate-{{ poll.pk }}"></div> </div> {% endif %} {% endif %} {% endif %} and here is my javascript: function bindVoteHandler() { $('a.vote-positive, a.vote-negative').click(function(event) { event.preventDefault(); var link = $(this).attr('rel'); var poll_pk = $(this).attr('alt'); var selected_div = $(this).parent('div'); selected_div.html('<img src="{{ STATIC_URL }}img/loading_small.gif" />'); $.ajax(link).done(function( data ) { var result_div = $('div#vote-result-'+poll_pk); result_div.html(data); result_div.removeClass('vote-result-grey-out'); selected_div.html('<small>Thanks for your vote.</small>'); }); }); }; did anyone know what is the problem why i need to refresh my page after Like/Vote/rate to make it become (Thanks For your vote) ? please someone know help or share link with me. Below is the image: before click Like: after click Like: then when refreshed the word just displayed, it supposed automatically display when click Like. Thank you in advance..

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  • Javascript is called in IE and FF but not in Chrome, why?

    - by JPJedi
    I have the following code below for a button on an aspx page. When it is clicked it should call a javascript that will print the text in that div. Everything works great in IE & Firefox but when it is tried in chrome it is as if the OnClientClick is not kicking off the javascript. I receive no errors and it works in IE and FF now. Below is the code for the button that calls the javascript. <asp:Button ID="btnEULAPrint" Text="Print" runat="server" ValidationGroup="EULA" OnClientClick="javascript:CallPrint('EULA');return false;"/> Anyone have any ideas or links they could share to point me in a direction? Thanks

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  • What happens to my web application if Javascript is disabled?

    - by Richard77
    Hello, I'm learning JQuery and am about to write some pages using intensively that library. I just learned that some user disable javascript on their browser (I didn't even know that was possible and/or necessary). Now, here's my question: What happens to my web application if a user disable Javascript? For instance, I'd like to display some screens using Ajax and commands such as 'InsertBefore' to bring in live a DIV that will display the result. So, if Javascript is disabled, I wonder what going to happen to all this work that relies on Javascript? I'm kind of lost. Thanks for helping

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  • How can the javascript plugin architecture in raphael/jquery be done?

    - by TimDog
    I'm looking for a barebones javascript example that demonstrates how the javascript plugin architecture works with large javascript libraries (such as raphael or jquery). In either scenario, you build plugins by ensuring your custom plugin follows this pattern: jQuery.fn.pluginName -- so assume I have a library: myLibrary = (function() { //my fancy javascript code return function() { //my return object }; }); How would fn be incorporated into the above myLibrary object to ensure that he resulting plugin is callable? I instantiate myLibrary like so: var lib = new myLibrary(); And now I have included a reference to my plugin in my page: myLibrary.fn.simplePlugin = function() { //more fancy code } So finally, I can just call: lib.simplePlugin(); Basically, what magic is actually occuring when the .fn is used during the creation of the plugin?

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  • Are there any drawbacks to class-based Javascript injection?

    - by jonathanconway
    A phenomena I'm seeing more and more of is Javascript code that is tied to a particular element on a particular page, rather than being tied to kinds of elements or UI patterns. For example, say we had a couple of animated menus on a page: <ul id="top-navigation"> ... </ul> <!-- ... --> <ul id="product-list"> ... </ul> These two menus might exist on the same page or on different pages, and some pages mightn't have any menus. I'll often see Javascript code like this (for these examples, I'm using jQuery): $(document).ready(function() { $('ul#top-navigation').dropdownMenu(); $('ul#product-selector').dropdownMenu(); }); Notice the problem? The Javascript is tightly coupled to particular instances of a UI pattern rather than the UI pattern itself. Now wouldn't it be so much simpler (and cleaner) to do this instead? - $(document).ready(function() { $('ul.dropdown-menu').dropdownMenu(); }); Then we can put the 'dropdown-menu' class on our lists like so: <ul id="top-navigation" class="dropdown-menu"> ... </ul> <!-- ... --> <ul id="product-list" class="dropdown-menu"> ... </ul> This way of doing things would have the following benefits: Simpler Javascript - we only need to attach once to the class. We avoid looking for specific instances that mightn't exist on a given page. If we remove an element, we don't need to hunt through the Javascript to find the attach code for that element. I believe techniques similar to this were pioneered by certain articles on alistapart.com. I'm amazed these simple techniques still haven't gained widespread adoption, and I still see 'best-practice' code-samples and Javascript frameworks referring directly to UI instances rather than UI patterns. Is there any reason for this? Is there some big disadvantage to the technique I just described that I'm unaware of?

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  • Build a JavaScript wrapper for a rails-generated XML API?

    - by Thor Thurn
    I am working with a large website written in Ruby on Rails. Thanks to the support for REST in Rails 2, the site's business logic is all accessible via a consistent XML API. Now I want to be able to easily write one or more JavaScript frontends to the site that interact with the generated Rails XML API. Ideally, an automated wrapper for the API could be created in JavaScript, since this would minimize the effort required in writing XML processing code for the more than 500 API functions. How, then, can I automatically generate a wrapper around a given XML API in JavaScript so that it's more pleasant to work with? I've worked with solutions of this nature for Java that generate classes and methods to wrap an API, so my current thinking is that I want something of that nature for JavaScript. I'd be open to an alternative take on the problem, though.

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  • How to send parameters with same encoding from javascript?

    - by nimcap
    I have a javascript file that lots of people have embedded to their pages. Since I am hosting the file, I have control over that javascript file; I cannot control the way it is embedded because lots of people is using it already. This javascript file sends GET requests to my servlets, and the parameters passed with the request are recorded to DB. For example, javascript sends a request to http://myserver.com/servlet?p1=123&p2=aString and then servlet records 123 and aString to DB somehow. Before sending strings I use encodeURIComponent() to encode it. But what I figured out is every client sends the same string with different encodings depending on either their browser or the site they are visiting. As a result, same strings are represented with different characters when it reaches servlet (so they are different strings). What I am trying to do is to convert the strings to one kind of encoding from javascript so when they reach the client same words are represented with same characters. How is this possible? PS. If there is a way to convert the encoding from Java it is also applicable.

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  • Netbean Cannot update Google App Engine server to appengine-java-sdk-1.3.2

    - by sy
    I am using Netbean 6.7.1 I just update my google app engine plugin in netbean with Netbean auto update. I found out there is new app engine SDK. So i want to update my google app engine server to point to appengine-java-sdk-1.3.2 After I download appengine-java-sdk-1.3.2.zip. I unzip it. Then at Netbean: I already have a Google App Engine server under Services - Server. I can't find anyway to point it to the newly installed sdk folder. So I deleted the existing "Google App Engine" server & try to add a new one. Server - Add Server - Google App Engine - at "Installation Location", I point it to google app engine folder, which is "C:\appengine-java-sdk-1.3.2", it show this message at bottom "C:\appengine-java-sdk-1.3.2" & don't allow me to continue. May I know how to solve this? thanks!

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  • javascript: "Object doesn't support this property or method" when ActiveX object called.

    - by agnieszka
    I've got simple html on Login.aspx with an ActiveX object: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html> <head><title></title> <script language="javaScript" type="text/javascript"> function getUserInfo() { var userInfo = MyActiveX.GetInfo(); form1.info.value = userInfo; form1.submit(); } </script> </head> <body onload="javascript:getUserInfo()"> <object id="MyActiveX" name="MyActiveX" codebase="MyActiveX.cab" classid="CLSID:C63E6630-047E-4C31-H457-425C8412JAI25"></object> <form name="form1" method="post" action="Login.aspx"> <input type="hidden" id="info" name="info" value="" /> </form> </body> </html> The code works perfectly fine on my machine (edit: hosted and run), it does't work on the other: there is an error "Object doesn't support this property or method" in the first line of javascript function. The cab file is in the same folder as the page file. I don't know javascript at all and have no idea why is the problem occuring. Googling didn't help. Do you ave any idea? Edit: on both machines IE was used and activex was enabled. Edit2: I also added if (document.MyActiveX) at the beggining of the function and I still get error in the same line of code - I mean it looks like document.MyActiveX is true but calling the method still fails

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  • Using javax.script or Rhino to run javascript in Java with browser context (e.g. envjs)?

    - by Shane
    I am trying to run Protovis javascript from a Java program using javax.script: ScriptEngineManager factory = new ScriptEngineManager(); ScriptEngine engine = factory.getEngineByName("JavaScript"); engine.eval(new java.io.FileReader("protovis-d3.1.js")); In order to run this, the JavaScript engine needs to have all the context of a web browser. The best option for this seems to be envjs. Unfortunately it seems that the version of Rhino included in the JVM isn't up to date and doesn't include everything that's necessary for envjs. Has anyone had any success working with a browser context from javax.script, or am I missing something? This is related to this question: "Can I create a ‘window’ object for javascript running in the Java6 Rhino Script Engine".

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  • How to Properly Reference a JavaScript File in an ASP.NET Project?

    - by DaveDev
    Hi Guys I have some pages that reference javascript files. The application exists locally in a Virtual Directory, i.e. http://localhost/MyVirtualDirectory/MyPage.aspx so locally I reference the files as follows: <script src="/MyVirtualDirectory/Scripts/MyScript.js" type="text/javascript"></script> The production setup is different though. The application exists as its own web site in production, so I don't need to include the reference to the virtual directory. The problem with this is that I need to modify every file that contains a javascript reference so it looks like the following: <script src="../Scripts/MyScript.js" type="text/javascript"></script> I've tried referencing the files this way in my local setup but it doesn't work. Am I going about this completely wrong? Can somebody tell me what I need to do? Thanks

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  • Why does it matter that in Javascript, scope is function-level, not block-level?

    - by Jian Lin
    In the question http://stackoverflow.com/questions/1451009/javascript-infamous-loop-problem the accepted answer from Christoph's says that JavaScript's scopes are function-level, not block-level What if Javascript's scopes are block-level, then would the Infamous Loop problem still occur? But will there be a different (or easier way) to fix it? Is it as opposed to other languages, where using a { would start a new scope?

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  • How do I configure emacs for editing HTML files that contain Javascript?

    - by MakeDummy
    I have started the painful first steps of using emacs to edit an HTML file with both HTML tags and javascript content. I have installed nxhtml and tried using it - i.e set up to use nxhtml-mumamo-mode for .html files. But I am not loving it. When I am editing the Javascript portion of the code the tab indents do not behave as they do when editing C/C++ code. It starts putting tabs within the line and if you try and hit tab in the white space preceding a line it inserts the tab rather than re-tabifying the line. Another aspect that I don't like is that it doesn't do syntax colouring like the usual C/C++ modes do. I much prefer the behaviour of the default java-mode when editing HTML files but that doesn't play nicely with the HTML code. :-( 1) Is there a better mode for editing HTML files with Javascript portions? 2) Is there a way to get nxhtml to use the default java-mode for the javascript portions? Regards, M

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  • Ok to implement backend/shared functionality for iPhone in JavaScript?

    - by John Wright
    Is it ok to use the Webkit Javascript engine to implement cross-platform, non-GUI backend functionality on the iPhone, iPad? In my case, I was interested in re-using Javascript code that I have that works on top of SQLite. I thought I would need to re-implement the logic in Obj-C but perhaps I could just share it and expose some hooks into Obj-C using JSCocoa or straight through JavaScript core. Is this legal per Apple guidelines?

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  • How might a C# programmer approach writing a solution in javascript?

    - by Ben McCormack
    UPDATE: Perhaps this wasn't clear from my original post, but I'm mainly interested in knowing a best practice for how to structure javascript code while building a solution, not simply learning how to use APIs (though that is certainly important). I need to add functionality to a web site and our team has decided to approach the solution using a web service that receives a call from a JSON-formatted AJAX request from within the web site. The web service has been created and works great. Now I have been tasked with writing the javascript/html side of the solution. If I were solving this problem in C#, I would create separate classes for formatting the request, handling the AJAX request/response, parsing the response, and finally inserting the response somehow into the DOM. I would build properties and methods appropriately into each class, doing my best to separate functionality and structure where appropriate. However, I have to solve this problem in javascript. Firstly, how could I approach my solution in javascript in the way I would approach it from C# as described above? Or more importantly, what's a better way to approach structuring code in javascript? Any advice or links to helpful material on the web would be greatly appreciated. NOTE: Though perhaps not immediately relevant to this question, it may be worth noting that we will be using jQuery in our solution.

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  • Are there any GOOD javascript addins for Visual Studio?

    - by Jeremy B.
    In our daily work we maintain some rather large Javascript libaries. We use VS2008 and while they made some improvements to the Javascript IDE, I still find it lacking. There is no outlining, no collapsing, or other ways to keep the code organized. I have tried js-addin and JSLint which crash and don't have the features I want, respectively. I have actually gone as far as running Aptana Studio as their Javascript IDE is much better than what I can get out of Visual Studio. I'm getting tired of having to maintain 2 IDE's. Is there anything out there that can make Javascript editing less painful in Visual Studio 2008? (We don't have the option of 2010 yet).

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  • is it good to wite multiple time <script type="text/javascript"> on one php page?

    - by I Like PHP
    i m using many tiny java script code at one php page, i always write java script code in below style <script type="text/javascript"> // <![CDATA[ ----code 1--------- // ]]> </script> <script type="text/javascript"> // <![CDATA[ ----code 2----- // ]]> </script> <script type="text/javascript"> // <![CDATA[ $(document).ready.(function(){ }); // ]]> </script> i want to know that is it good practice to write separate <script type="text/javascript"></script> on same page or we have to write all java script code under one time declaration

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