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  • TypeScript or JavaScript for noob web developer [closed]

    - by Phil Murray
    Following the recent release by Microsoft of TypeScript I was wondering if this is something that should be considered for a experienced WinForm and XAML developer looking to get into more web development. From reviewing a number of sites and videos online it appears that the type system for TypeScript makes more sense to me as a thick client developer than the dynamic type system in Javascript. I understand that Typescript compiles down to JavaScript but it appears that the learning curve is shallower due to the current tooling provided by Microsoft. What are your thoughts?

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  • Tools for building long-running Javascript webapp

    - by FilipK
    Given my lack of familiarity with such tools, could you suggest what tools / frameworks would be suitable for developing a long-running JavaScript webapp? The webapp would display a constantly updating chart. The updates would come through WebSockets (preferably) or XmlHttpRequest. I know and have written JavaScript with JQuery, but for this task I assume something like backbone.js or ExtJS would be appropriate (or maybe not?).

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  • JavaScript: catching URI change

    - by ptrn
    I have a site where I'm using hash based parameters, eg. http://url.of.site/#param1=123 What I want When the user manually changes the URI to eg. http://url.of.site/#param1=789 When the user enters this URI, the event is caught by the JavaScript, and the appropriate functions are called. Basically, what I'm wondering about is; is there an event listener for this? Or would I have to periodically check the URI to see if it has been changed? I'm already using the current jQuery API, if that helps. _L

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  • Leaving out type="text/javascript" language="javascript"

    - by coffeeaddict
    Most of the script tags I create, I always include type="text/javascript" language="javascript" in the tag. My boss however does not. Sometimes he excludes both, sometimes just has language=javascript even without the quotes Now we have not had an issue in any of the major browsers with his tags. I'm talking about all versions of IE, FF, Safari, and Chrome. Personally I feel it's laziness and just totally improper and bad coding practice to leave stuff out like this even if it works without it. Anyone know if both should be included or just one or is it ok to leave both out in ASP.NET?

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  • JavaScript inline events syntax

    - by Mic
    Is there any reason to use one of the following more than the others: <input type="button" value="b1" onclick="manageClick(this)" /> <input type="button" value="b2" onclick="manageClick(this);" /> <input type="button" value="b2" onclick="manageClick(this);return false;" /> <input type="button" value="b3" onclick="return manageClick(this);" /> <input type="button" value="b4" onclick="javascript:return manageClick(this);" /> And please do not spend your valuable time to tell me to use jQuery or attachEvent/addEventListener. It's not really the objective of my question.

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  • Server Side Javascript

    - by XGreen
    Hi all, I can't help to see in many sites I visit the enthusiasm about server side javascript and the appealing look of a single language governing all tiers of the site. Mozilla Rhino, Aptana Jaxer and various John Resig's articles are some of the highlights of my search. I wanted to ask for some input from you guys on SO. your opinions and preferably experience in this. I do most of the data access and business logic currently either with asp.net or php depending on the hosting package of the client. Is anyone among you who's gave up these for ssjs?

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  • JavaScript Intellisene Problem?

    - by James Wiseman
    I've got an issue with JavaScript intellisense in Visual Web Developer 2008, which I'm starting to believe is "just one of those things", but thought I'd ask here just to check. I have a file MyOtherFile.js with a function GetRandomNumber() defined like so: function GetRandomNumber() { /// <summary> /// Summary description for GetRandomNumber /// </summary> return Math.random(); } When I reference this from another file, screen.js (/// <reference path="MyOtherFile.js" />) I get the intellisense as expected with the summary text as above. If, however, I call the function GetRandomNumber from within its own file (MyOtherFile.js) then I don't get the sumamry description. Any thoughts? Thanks.

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  • Test whether image loaded correctly with JavaScript

    - by johkar
    I have an image deployed on several application servers (green up arrow: uparrow.gif). I have an application server status page where I list out all the servers and with a corresponding image where the image's source is the uparrow.gif for that server. If the image does not load (server down) I would like to switch to a red down arrow (downarrow.gif). Is there a way to check whether an image loaded or not with straight JavaScript (no JS libraries etc)? I would imagine I would set an interval for it to continue checking if the user were on the page. Thanks.

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  • Running custom Javascript on every page in Mozilla Firefox

    - by saturn
    I have a custom piece of Javascript which I would like to run on every web page from specific domains, or perhaps simply on every web page. (If you are wondering: it is not malicious. It allows to display formulas by using MathJax.) Is that possible? I tried including it in userContent.css, that of course did not work. A simple Greasemonkey script I tried did not insert it. Is it because of the security precautions? (Which would be very logical). Still, there should be a way to do it on the machine I physically control, by changing something in Mozilla chrome directory, shouldn't it? Anyway, how can I do this for myself?

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  • Why javascript IF only works one time?

    - by Emily
    I have javascript code which copy the value of input file and past it in the text box in real time. <script> function copyit(){ var thephoto=document.getElementById('thephoto').value; var fileonchange=document.getElementById('fileonchange').value; if(!thephoto==fileonchange){ document.getElementById('fileonchange').value=thephoto; } } window.setInterval("copyit()", 500); </script> Choose File : <input type="file" id="thephoto"><br> Here Is the file name : <input type="text" id="fileonchange"> Sadly this only works one time and then stops pasting the value when changing the file again. ( i mean you should reload the page to works again) Is IF has a cache or something? you can try the code by yourself to see. Thank you all

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  • Modify url for bookmarking using JavaScript

    - by jamesaharvey
    I'm exploring my options for modifying urls in the browser bar for bookmarking purposes. Ideally, I'd like to add querystring parameters and cannot determine if this is even possible. I don't want the page to refresh and want to add querystring values on link clicks, ajax calls, etc. If I can't add querystring parameters, then I'd like to add hash values (http:://someurl.com#hash-value). How should I go about doing this? Should I use plain JavaScript or a framework (jquery, prototype, etc.) and/or framework plugin.

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  • click() (javascript) method is not working in FF

    - by Bragaadeesh
    Hi, The following code is throwing two alerts as expected in IE but not in Firefox. Please help. <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML> <HEAD> <SCRIPT LANGUAGE="JavaScript"> <!-- function myFunction(){ alert('myfunc'); document.getElementById('mylabel').click(); } //--> </SCRIPT> </HEAD> <BODY> <p id='mylabel' onclick="alert('you reached');"></p> <input type='button' value="Click me" onclick='myFunction();'/> </BODY> </HTML> Thanks

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  • Drag and drop an image from desktop to a web text editor (implementation in javascript)

    - by fatmatto
    I tried to write reasonably short title but i failed i guess.. Hi everybody here's what i'm trying to do: I want to implement a web text editor able to recognize when the user drag a image file over it's editing surface and it automa(gically) starts the upload and insert the image near the cursor position. In other words i don't want the user to do the usual "insert-image-browse-ok". Atm i am not very good at javascript ... i know JQuery but i have not a clear idea about how to implement this... i don't know if there's an event handler able to help me in this situation... if not then there should be i think or web apps would miss some kind of interactivity. I've heard miracles about HTML5 could it help me? I've seen such things in Google Wave but that surface doesn't seem to be a form field... google lab's black magic i guess.... Thank you in advance.

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  • fb.init events when initialized

    - by oshafran
    Hi I have this code window.fbAsyncInit = function() { FB.init({ appId: 'balblablablbal', status: true, cookie: true, xfbml: false }); }; (function() { var e = document.createElement('script'); e.src = document.location.protocol + '//connect.facebook.net/en_US/all.js'; e.async = true; document.getElementById('fb-root').appendChild(e); } ()); I would like to do something only after those JSs have been loaded (i.e. hook on FB.init event) How can I do that thanks

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  • Switching Javascript Function states

    - by webzide
    Dear experts, I would like to implement a API of Javascript that sort of resemble a light switch. For instance, there are two buttons on the actual HTML page act as the UI. Both of the buttons have event handlers that invokes a different function. Each function have codes that act like a state, for instance. button1.onclick=function (){ $("div").click( //code effects 2 ) } button2.onclick=function (){ $("div").click( //Code effects 2 ) } I the code works fine on the surface but the 2 state functions overlap. the effects is going to take place for the rest of the way until the next reload of the document. Basically what I want to achieve is that when 1 button is clicked, it will switch "OFF" the state of function invoked by the other button and vice versa. Thus, the effects achieved are unique are not overlapped. Is there anyway to achieve this or could any experts point me to the right direction. Thanks in advance.

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  • Javascript parent page redirection from iframe.

    - by Danil
    Hello to all. I need to implement parent page redirection from iframe. I know that it is impossible to do in different domains due to browsers security. However I found that links have target attribute and tried to use it in the following way: <a href="http://google.com" target="_top" id="testParentRedirect">someLink</a> It works fine if I click this link manually, but I couldn't find cross-browser solution to simulate it using javascript. document.getElementById('testParentRedirect').click(); This works fine in IE, however Firefox and Safary don't know click function :). I tried to work with jquery, but for some reason they don't simulate click event for links. (see following post) I couldn't find any appropriate solution on stackoverflow. Maybe someone could help me in it. I will appreciate it. :)

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  • Detecting support for a given JavaScript event?

    - by Will
    I'm interested in using the JavaScript hashchange event to monitor changes in the URL's fragment identifier. I'm aware of Really Simple History and the jQuery plugins for this. However, I've reached the conclusion that in my particular project it's not really worth the added overhead of another JS file. What I would like to do instead is take the "progressive enhancement" route. That is, I want to test whether the hashchange event is supported by the visitor's browser, and write my code to use it if it's available, as an enhancement rather than a core feature. IE 8, Firefox 3.6, and Chrome 4.1.249 support it, and that accounts for about 20% of my site's traffic. So, uh ... is there some way to test whether a browser supports a particular event? Thanks.

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  • Facebook Friends.getAppUsers using Graph API

    - by Richard
    I have an application that uses the old REST API call Friends.getAppUsers to get the list of friends for the current user that have authorized my application. I have read the docs, but I can't figure out how to do this with the Graph API. Can someone give me an example?

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  • iPhone SDK UIScrollView doesn't get touch events after moving it

    - by newbie
    Hi! I'm subclassing UIScrollView and on the start I fill this ShowsScrollView with some items. After filling it, I setup frame and contentSize to this ShowsScrollView. Everything works fine for now, i get touches events, scrolling is working.. But after rotation to landscape, I change x and y coordinates of ShowsScrollView frame, to move it from bottom to top right corner. Then I resize it (change width and height of ShowsScrollView frame) and reorder items in this scroll. At the end I setup new contentSize. Now i get touches event only on first 1/4 of scrollview, scrolling also work only on 1/4 of scrollview, but scroll all items in scrollview. After all actions I write a log: NSLog(@"ViewController: setLandscape finished: size: %f, %f content: %f,%f",scrollView.frame.size.width,scrollView.frame.size.height, scrollView.contentSize.width, scrollView.contentSize.height ); Values are correct: ViewController: setLandscape finished: size: 390.000000, 723.000000 content: 390.000000,950.000000 On rotating back to portrait, I move and resize all thing back and everything works fine.. Please help!

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  • How to quickly determine whether a file is an image file using iPhone/iPad SDK

    - by Josh Bleecher Snyder
    If I have a (potentially largish) file on disk, and I want to determine quickly whether UIImage will be able to load it. I don't necessarily trust the file extension to be reliable; I need to look at the actual data. I can (of course) load it into a UIImage, but that's relatively slow and rather memory intensive. I'd rather just peek at the first chunk of the file and make a decision. What's the fastest, most efficient way to go about this that is still fairly reliable? (Ideally, it'd be an Apple-provided API, but I didn't turn one up in my searches.) A 99.9% solution is good enough; I'm willing to have false positives in rare cases, such as when an image file has been truncated.

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  • Get a Facebook stream post by post_id

    - by rksprst
    I want to get the details (contents, user info) of a post that was made on a fan page's stream. I have the post_id variable but don't see any method/api call where I can pass in a post_id to get the post contents. The only thing that seems possible is getting the entire stream and comparing the post_id item by item... which is slow and inefficient. Anyone had this problem or know how to do it?

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  • javascript removeChild(this) from input[type="submit"] onclick breaks future use of form.submit() un

    - by maximumduncan
    I have come across some strange behaviour, and I'm assuming a bug in firefox, when removing a input submit element from the DOM from within the click event. The following code reproduces the issue: <form name="test_form"> <input type="submit" value="remove me" onclick="this.parentNode.removeChild(this);" /> <input type="submit" value="submit normally" /> <input type="button" value="submit via js" onclick="document.test_form.submit();" /> </form> To reproduce: Click "remove me" Click "submit via js". Note that the form does not get submitted, this is the problem. Click "submit normally". Note that the form still gets submitted normally. It appears that, under Firefox, if you remove a submit button from within the click event it puts the form in an invalid state so that any future calls to form.submit() are simply ignored. But it is a javascript-specific issue as normal submit buttons within this form still function fine. To be honest, this is such a simple example of this issue that I was expecting the internet to be awash with other people exeriencing it, but so far searching has yealded nothing useful. Has anyone else experienced this and if so, did you get to the bottom of it? Many thanks

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  • Facebook White Screen

    - by Chris
    We keep getting a white-screen on our FB application, although the server is successfully getting hit and no errors are occurring. Is there a setting or something we can do to resolve this? Does anyone know about this issue?

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