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  • Why .data() function of jQuery is better to prevent memory leaks?

    - by burak ozdogan
    Hi, Regarding to jQuery utility function jQuery.data() the online documentation says: "The jQuery.data() method allows us to attach data of any type to DOM elements in a way that is safe from circular references and therefore from memory leaks. " Why to use: document.body.foo = 52; can result a memory leak -or in what conditions- so that I should use jQuery.data(document.body, 'foo', 52); Should I ALWAYS prefer .data() instead of using expandos in any case? (I would appreciate if you can provide an example to compare the differences) Thanks, burak ozdogan

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  • Dynamic Frame Creation

    - by piluso
    Hi, I have a web page, normal no fuzz or weird stuff. And I want to trap that page inside an html frame when a user clicks on a given link. The thing is i don't want to reload the page. Some kind of dynamic DOM trickery seems the way to go, but to no avail in my tests. If anyone has any ideas it would be great! Thanks

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  • Google Chrome showing javascript security error

    - by Clint
    I need help resolving this Google Chrome Error..."Uncaught Error: SECURITY_ERR: DOM Exception 18" Here is the code. //Get Cookie function get_cookie (cookie_name) { var results = document.cookie.match ( '(^|;) ?' + cookie_name + '=([^;]*)(;|$)' ); if (results) return ( unescape ( results[2] ) ); else return null; }; Many thanks, C

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  • Other HTML serialisations?

    - by Delan Azabani
    After keeping in mind that HTML has both an SGML and XML serialisations, which are just encodings for a parser to "explode" into a DOM, I'm wondering whether there are other serialisations for HTML. A JSON serialisation? If so, are there any parsers for these alternative serialisations?

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  • How to listen to keyboard events in GWT table?

    - by Olaf Mertens
    In my GWT program I have a table that has a selected row. I'd like to move the row selection with the up- and down-keys on the keyboard. So I have to catch the key events somehow. The GWT docs handle key events in input fields only. But I don't have an input field! Is this possible at all? Maybe it is a DOM/Javascript restriction that GWT cannot work around...

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  • Move jQuery data() when an element is destroyed and re-created

    - by Ed Woodcock
    Can anyone think of a (preferably quick) way to move the data() attached to a DOM element to a new instance of itself? The lightbox plugin I'm using deletes and re-appends and element to the page in order to display it in the lightbox (to aviod the multiple-ids issue that ASP.net has), and obviously the .data() that is attached to the element is lost when this happens.

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  • how to add to dates in java??

    - by terrific
    I want to add days in a date to get a new date in java. How to achieve it using the Calender class. Gregorian calender. Calender dom = new GregorianCalender(d, m y); is the instance of my date of manufacture and I want to reach to Date of Expiry adding some 100 days to the current date and store it in doe but unable to do that. Any help would be appreciable.

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  • Pass variables to current tab via chrome extension

    - by iamthejeff
    I am writing my first chrome extension, and I want to pass a variable to the currently opened tab and manipulate the DOM with it. My extension has a button, and when clicked, is executing this code: chrome.tabs.getSelected(null, function(tab) { chrome.tabs.executeScript(tab.id, { file: 'tabscript.js' }); }); This works fine, but I see no way to pass a variable to tabscript.js so it can be used on the opened tab.

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  • Reset element to "default" event

    - by Channel72
    In Javascript, how can you set the event handler of a DOM element to default behavior? For example, suppose I set the onkeypress event of an input element: elem.onkeypress = function() { alert("Key pressed!"); } Later, how can I remove this event? Is it okay to simply set the onkeypress property to null? I tried that and it works, but I don't know if it is the proper way to do this.

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  • Web Application Loading Screen

    - by Matt Charlton
    I have a web app that has several tree views. When the page loads i see the unordered lists and after a small latency the styling of the tree is rendered into the DOM. Is there a way to mask the webapp, and have a spinner in the middle of the screen, and when everything on the page is fully rendered the spinner goes away and the mask fades out? Kind of like a semi transparent mask that you would see on a lightbox pop-up dialog.

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  • Html string reader

    - by Oakcool
    Hi all, I need to load HTML and parse it, I think that it should be something simple, I pass a string with a "HTML" it reads the string in a Dom like object, so I can search and parse the content of the HTML, facilitating scraping and things like that. Do you guys know about any thing like that. Thanks

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  • AJAX in Rails - doing simple looping to update information when available

    - by Acidburn2k
    I am trying to get put out a simple site, which would pool the database every few seconds and update the information on the page dynamicly, when theres something new inserted. I am farily new to ruby, but I understand the whole concept of RJS, link_to_function and soforth. The question is, what is the best way how to implement some kind of simple loop, which would run after the page is loaded and update the DOM if there is something new to display. Thanks in advance for any tips!

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  • onscroll for div

    - by The Machine
    Does a div element not have , an onscroll event handler ? The behaviour on my page, doesn't seem to indicate the div onscroll eventHandler is recognized. <div id='bd' onscroll='alert('Scroll Called');'></div>. Also, Do div scroll events roll up to window scroll events, as per DOM event bubbling ?

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  • Parsing the response from a jQuery ajax form post

    - by GrahamB
    I am successfully posting a form via ajax, using the following code; $.post( "Page.do?source=ajax", $("#Form").serialize(), function(data){ } The data response that comes back can be alert'd. I can see that it is the HTML of the entire form, having been submitted. But, I am having trouble accessing an element in that form which has come via ajax, ie data.find('.Errors').html() or $('.Errors', data).html() Do I need to somehow convert the text into a DOM which can then be parsed by jQuery?

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  • Navigation and WebBrowser control

    - by Neir0
    Hi, Can i use XPAth expressions to navigate through DOM elements in WebBrowser control? May be attaching javascript code and use document.evaluate function is right way? Can another activeX browser component(firefox,webkit.net) help me to solve my task?

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  • How can I replicate YUI's getElementsBy using Prototype?

    - by LogicWolfe
    I'm moving some code from YUI to javascript and some of it is using YUI's YAHOO.util.Dom.getElementsBy(function). I've been reading through the prototype API docs and haven't been able to find something equivalent. It needs to be able to take an arbitrary function not just select off a CSS selector or the like. Can anyone suggest to me the best way to accomplish this in Prototype?

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  • Hide public method used to help test a .NET assembly

    - by ChrisW
    I have a .NET assembly, to be released. Its release build includes: A public, documented API of methods which people are supposed to use A public but undocumented API of other methods, which exist only in order to help test the assembly, and which people are not supposed to use The assembly to be released is a custom control, not an application. To regression-test it, I run it in a testing framework/application, which uses (in addition to the public/documented API) some advanced/undocumented methods which are exported from the control. For the public methods which I don't want people to use, I excluded them from the documentation using the <exclude> tag (supported by the Sandcastle Help File Builder), and the [EditorBrowsable] attribute, for example like this: /// <summary> /// Gets a <see cref="IEditorTransaction"/> instance, which helps /// to combine several DOM edits into a single transaction, which /// can be undone and redone as if they were a single, atomic operation. /// </summary> /// <returns>A <see cref="IEditorTransaction"/> instance.</returns> IEditorTransaction createEditorTransaction(); /// <exclude/> [EditorBrowsable(EditorBrowsableState.Never)] void debugDumpBlocks(TextWriter output); This successfully removes the method from the API documentation, and from Intellisense. However, if in a sample application program I right-click on an instance of the interface to see its definition in the metadata, I can still see the method, and the [EditorBrowsable] attribute as well, for example: // Summary: // Gets a ModelText.ModelDom.Nodes.IEditorTransaction instance, which helps // to combine several DOM edits into a single transaction, which can be undone // and redone as if they were a single, atomic operation. // // Returns: // A ModelText.ModelDom.Nodes.IEditorTransaction instance. IEditorTransaction createEditorTransaction(); // [EditorBrowsable(EditorBrowsableState.Never)] void debugDumpBlocks(TextWriter output); Questions: Is there a way to hide a public method, even from the meta data? If not then instead, for this scenario, would you recommend making the methods internal and using the InternalsVisibleTo attribute? Or would you recommend some other way, and if so what and why? Thank you.

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