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  • What is the best way to pass server side variables to JavaScript on the client side?

    - by steve_c
    Our application uses a lot of configuration options. Those options need to be reflected on the client side in the form of User preferences, site wide preferences, etc. Currently, we pass server side settings down to the client side in the form of JSON that is stored in custom attributes in the markup for a specific element (and no, our application currently doesn't worry about W3C validation). We then retrieve the data from the custom attribute, and parse it into a JSON object for use in script using jQuery. One drawback to this is referencing attributes on elements from within event handlers. I know this is frowned upon, as it can create circular references, and subsequently memory leaks. I would much prefer to use jQuery's data function, but you can't invoke this from the server side at page render time. What does everyone else do in this type of scenario?

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  • How to refer to object in JavaScript event handler?

    - by George Edison
    Note: This question uses jQuery but the question has nothing to do with jQuery! Okay so I have this object: var box = new BigBox(); This object has a method named Serialize(): box.AddToPage(); Here is the method AddToPage(): function AddToPage() { $('#some_item').html("<div id='box' onclick='this.OnClick()'></div>"); } The problem above is the this.OnClick() (which obviously does not work). I need the onclick handler to invoke a member of the BigBox class. How can I do this? How can an object refer to itself in an event handler?

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  • how to pass in a reference to a string in javascript?

    - by ijjo
    maybe a closure is my solution? not exactly sure how to pull it off though. the code is set up like so: var globalVar = ''; var globalVar2 = ''; function func() { if (condition) func2(globalVar) else func2(globalVar2) } in func2() i cache some HTML in a main container into the appropriate global variable that i pass to it. basically i have a main container that holds different pages depending on what tab they choose. for performance i want to cache the page into global vars so i need to know what tab is active to figure out which global var to assign the html to.

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  • There is a JavaScript error in my rails application!

    - by Small Wolf
    As the title said, I got a problem! i encountered the "RJS Error:[object error]",the code in my application is page << "#{hidden_print("#{url_for(:controller => 'tables', :action => 'dispatch', :id => id, :pop => true, :print =>true)}")} " the method hidden_print is def hidden_print(url) "window.parent.headFrame.document.all.iframe_helper.src = '#{url}';" end

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  • [JS] How to manipulate a PHP Array in javascript?

    - by rasouza
    I have an Array in PHP which contains data from database. And it prints out also as a table in the same page which has an AJAX delete function. Trying to explain better The array contains debt sums related to many people, it is the application's main function. In the same page, there is a table containing every debt record related to the array, which can be deleted or edited using AJAX. I have coded the part of deleting the record and removing the TR entry, but it's not enough: I'd like to change also the debt sum using AJAX which is an PHP Array. What I have I have the JS function which removes the TR when the delete button is clicked // TR Fading when deleted $('.delete') .click(function() { $.ajax({ type: 'GET', url: 'history/delete/id/'+$(this).attr('id') }); $(this).parent().parent().fadeOut(); return false; }); and I have the PHP array (image)

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  • Why is it safe to use copy & paste in Flash but not in Javascript?

    - by Lenni
    I'm trying to use copy'n paste in one of my web apps and have read a few articles/SO questions about it. Most people say that using Flash is the only option since most browsers don't allow access to the system clipboard because of security concerns. I can understand this but I wonder why it is okay for Flash do this, but not for the browser. Or has it got nothing to do with security and it is simply to complicated to implement this for cross-platform browser vendors?

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  • My javascript doesn't work on IE. What should I change?

    - by klm
    I'm making simple site for my school project. My code doesn't work on my teacher's PC (he has IE 6 or 7 - I don't remember). I use it to change content on site (kind of menu). html: <ul> <li onclick="run(1)"> ... </li> <li onclick="run(2)"> ... </li> <li onclick="run(3)"> ... </li> <li onclick="run(4)"> .... </li> <li onclick="run(5)"> .... </li> <li onclick="run(6)"> .... </li> </ul> Script: function run(x) { ///New Content: var a = ... var e = "<a href='xxxx'> aaaaaa</a>" //example ///////////////////// var p = document.getElementById("content"); if(x === 1) { p.innerHTML=a; } else if(x === 2) { p.innerHTML=b; } else if(x === 3) { p.innerHTML=c; } else if(x === 4) { p.innerHTML=d; } else if(x === 5) { p.innerHTML=e; } else { p.innerHTML=f; } };

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  • How can I get reason of page unloading in javascript's onunload event, in IE?

    - by DM
    There may be different reasons of page unloading: 1 User closes the current window. 2 User navigates to another location. 3 Clicks the Back, Forward, Refresh, or Home button. 4 User submits a form, and then browser starts to unload current page and load page with results of form submitting. (Assuming that the current window is the form's target). 5 and so on... Can I somehow know in onunload handler that the reason of unloading is p.4, i.e. moving to page with results of form submitting? I could define some flag when submiting form, but this does not solve the problem. Because response (on form submit) from web server takes some time, browser doesn't unload the current page immediately and waits response from server. And during this waiting user may close window or navigate anywhere. And I need to know whether was it indeed moving to results page or something else...?

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  • how to .call() on the unnamed function in javascript?

    - by Anonymous
    Let's suppose I have button #click, And suppose I bind the on click event as follows: $('#click').click(function(){ alert('own you'+'whatever'+$(this).attr('href')); }); But I want this to refer to some other element, let's say #ahref. If it was a named function I would simply refer it by name: foo.call('#ahref'); How could I use .call() though, if the function is called inline and does not have a name?

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  • Javascript: click and dblclick deliver different parentNodes on same html. Why?

    - by user1658206
    currently I work on an very small wysiwyg editor based on jquery. I dont care about IE oder Chrome, just Firefox. My problem is to find if the selection is in a link for to get the value of the href attribute if is set. With click the node of the link is found, with double click always the body. It is in designMode. My event-handler for click and dblclick. The vars current_selection, current_node, iframe and container are global. selection_handler:function() { current_selection = iframe.getSelection(); current_node = current_selection.anchorNode; if(current_node.nodeName == "#text") { current_node = current_node.parentNode; } $('#log').text(current_node.nodeName); }, The log shows mit for example 'body', when I click in unformated text. When I add a link with execCommand('createLink',...) the log shows 'A'. That works. When I mark the linked word with 2 click from start to end, the log shows 'A'. But with double click I always get 'body'. So I can't get the href attribute. The handler is defined in the init: init:function(options) { ... iframe = $('#wysiwyg-'+container.attr('id'))[0].contentWindow; iframe.addEventListener('dblclick',methods.selection_handler,false); iframe.addEventListener('click',methods.selection_handler,false); ... } Has somebody an idea what is wrong?

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  • Do I need to specify a return type for an anonymous function in javascript / typescript?

    - by Anne
    I have the following function: $('td:eq(' + iColumn + ') input', oSettings.oApi._fnGetTrNodes(oSettings)) .each(function () { aData.push(this.value); }); In typescript I am getting a message saying: Error 3 Function declared a non-void return type, but has no return expression Why am I getting this message? I can resolve the message by saying "return true". Should I always specify a return type for this?

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  • Best way to set a default button (or trigger its event in javascript) for an input field, not part of a form

    - by Sheldon Pinkman
    I've got a stand-alone input field, not part of any form. I also got a button, that has some onclick event. When I type something in the input field, and press the Enter key, I want it do effectively press the button, or trigger its onclick event. So that the button is "the input field's default button" so to speak. <input id='myText' type='text' /> <button id='myButton' onclick='DoSomething()'>Do it!</button> I guess I can mess around with the input field's onkeypress or onkeydown events and check for the Enter key, etc. But is there a more 'clean' way, I mean something that associated the button with that input field, so that the button is the 'default action' or something for that field? Note that I'm not inside a form, I am not sending, posting, or submitting something. The DoSomething() function just changes some of the HTML content locally, depending on the text input.

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  • Is there any way to make this JavaScript tab completion script more efficient?

    - by Saladin Akara
    This code is to be integrated into an AJAX Chat system to enable a tab auto-completion of user names: var usernames = new Array(); usernames[0] = "Saladin"; usernames[1] = "Jyllaby"; usernames[2] = "CadaverKindler"; usernames[3] = "qbsuperstar03"; var text = "Text and something else q"; // Start of the script to be imported var searchTerm = text.slice(text.lastIndexOf(" ") + 1); var i; for(i = 0; i < usernames.length && usernames[i].substr(0,searchTerm.length) != searchTerm; i++); // End of the script to be imported document.write(usernames[i]); A couple of notes to be made: The array of usernames and the text variable would both be loaded from the chat itself via AJAX (which, unfortunately, I don't know), and the final output will be handled by AJAX as well. Is there a more efficient way to do this? Also, any tips on how to handle multiple instances of the searchTerm being found?

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