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  • Explain a block of crazy JS code inside Sizzle(the CSS selector engine)

    - by Andy Li
    So, here is the function for pre-filtering "CHILD": function(match){ if ( match[1] === "nth" ) { // parse equations like 'even', 'odd', '5', '2n', '3n+2', '4n-1', '-n+6' var test = /(-?)(\d*)n((?:\+|-)?\d*)/.exec( match[2] === "even" && "2n" || match[2] === "odd" && "2n+1" || !/\D/.test( match[2] ) && "0n+" + match[2] || match[2]); // calculate the numbers (first)n+(last) including if they are negative match[2] = (test[1] + (test[2] || 1)) - 0; match[3] = test[3] - 0; } // TODO: Move to normal caching system match[0] = done++; return match; } The code is extracted from line 442-458 of sizzle.js. So, why is the line var test = ..., have the exec inputing a boolean? Or is that really a string? Can someone explain it by splitting it into a few more lines of code?

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  • Is Bootstrap 2.1 compatible with jQuery UI?

    - by Ghopper21
    It's a known problem that the older Bootstrap didn't work out of the box with jQuery UI, as you can see from this github discussion. There are a few mashups of the two, including jQuery Bootstrap by John Seigers and jQuery UI Bootstrap by Addy Osmani. Are those mashups still necessary with the new version of Bootstrap, or can you now just use Bootstrap and jQuery UI out of the box (as is alluded to vaguely in the github discussion)?

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  • How to parse (infinite) nested object notation?

    - by kyogron
    I am currently breaking my head about transforming this object hash: "food": { "healthy": { "fruits": ['apples', 'bananas', 'oranges'], "vegetables": ['salad', 'onions'] }, "unhealthy": { "fastFood": ['burgers', 'chicken', 'pizza'] } } to something like this: food:healthy:fruits:apples food:healthy:fruits:bananas food:healthy:fruits:oranges food:healthy:vegetables:salad food:healthy:vegetables:onions food:unhealthy:fastFood:burgers food:unhealthy:fastFood:chicken food:unhealthy:fastFood:pizza In theory it actually is just looping through the object while keeping track of the path and the end result. Unfortunately I do not know how I could loop down till I have done all nested. var path; var pointer; function loop(obj) { for (var propertyName in obj) { path = propertyName; pointer = obj[propertyName]; if (pointer typeof === 'object') { loop(pointer); } else { break; } } }; function parse(object) { var collection = []; }; There are two issues which play each out: If I use recurse programming it looses the state of the properties which are already parsed. If I do not use it I cannot parse infinite. Is there some idea how to handle this? Regards

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  • JS function returning another function

    - by Michael
    I want to understand about variables, that has been used in returning function. This is example code Prototype = {} Prototype.F = { bind: function() { var args = arguments, __method = args.shift(), object = args.shift(); return function() { return __method.apply(object, args.concat(arguments)); } } } function ObjectA() { ... this.addListener = Prototype.F.bind(this.eventSource.addListener, this.eventSource); ... } var a = ObjectA(); a.addListener(this); // assuming 'this' here will point to some window object As I understand the returning function in F() is not evaluated until it's called in the last line. It's ok to accept. So addListener will hold a function body containing 'apply'. But what I don't understand, when addListener is called, what kind of parameters it is going to have? particularly _method and args will always be uninitialized?

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  • Problems with noobs putting my GA code into their sites

    - by dclowd9901
    I don't mean for the title to be derogatory, but this is a rather frustrating problem, and I'm looking for a good workaround, given a language barrier involved. I have a site set up for a plugin I wrote, and, rather than use the site's resources to write their own code, I've had people simply rip the code from the samples on the site. Normally, this wouldn't be any issue at all, but they are also taking my Google Analytics instantiation, so my Analytics data is getting very skewed by incorporating visitation data from their websites. I've been able to contact the English-speaking site owners with little issue. The problem lies in the Japanese language sites that are yanking the code. I have no idea how to ask them to take down the analytics portion. Long-term, I'm providing a package that streamlines the learning-to-use process, but in the meantime, what can I do about this language barrier? Is there a way around this problem that I haven't thought of?

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  • jQuery leaveNotice plugin and internet explorer

    - by Mikhail Nikalyukin
    Hello, im using leaveNotice plugin and example from authors page (example number six, the last one) On the site all looks all right in both chrome and ie8. When im implement this in my page, in chrome all still looks ok, but ie as usually messed it up. Background appears under the text and pop up appears under the background. It's propably issue with css, but im not have css skills to fix it up. Plus with same css on example site all looks all right, im a lil bit confuse, help me please.

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  • jQuery > Update inline script on form submission

    - by Andrew Kirk
    I am using the ChemDoodle Web Components to display molecules on a web page. Basically, I can just insert the following script in my page and it will create an HTML5 canvas element to display the molecule. <script> var transform1 = new TransformCanvas('transform1', 200, 200, true); transform1.specs.bonds_useJMOLColors = true; transform1.specs.bonds_width_2D = 3; transform1.specs.atoms_useJMOLColors = true; transform1.specs.atoms_circles_2D = true; transform1.specs.backgroundColor = 'black'; transform1.specs.bonds_clearOverlaps_2D = true; transform1.loadMolecule(readPDB(molecule)); </script> In this example, "molecule" is a variable that I have defined in an external script by using the jQuery.ajax() function to load a PDB file. This is all fine and good. Now, I would like to include a form on the page that will allow a user to paste in a PDB molecule definition. Upon submitting the form, I want to update the "molecule" variable with the form data so that the ChemDoodle Web Components script will work its magic and display molecule defined by the PDB definition pasted into the form. I am using the following jQuery code to process the the form submission. $(".button").click(function() { // validate and process form here //hide previous errors $('.error').hide(); //validate pdb textarea field var pdb = $("textarea#pdb").val(); if (pdb == "") { $("label#pdb_error").show(); $("textarea#pdb").focus(); return false; } molecule = pdb; }); This code is setting the "molecule" variable upon the form submission but it is not being passed back to the inline script as I had hoped. I have tried a number of variations on this but can't seem to get it right. Any clues as to where I might be going wrong would be much appreciated.

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  • How to change the number of columns in a table dynamically but still keep the table layout intact?

    - by gurupriyan.e
    I have a 'n' column table , the first column is a drop down box , on selecting the options from the drop down, the other columns change. For eg: first drop down might need to display a text box and a button , the second drop down 3 text boxes and a button and so on. There is only one row in the table. What is the best solution to achieve this. with Sincere thanks,

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  • php not redirecting

    - by NSchulze
    I'm trying to write the logout of a website. When I do this I want the page to redirect to the login page. I think I'm doing it the correct way, but can't get the right result. Could you guys point me in the right direction? Relevant Code: <button onclick="logout()">Logout</button> function logout() { var xmlhttp; if (window.XMLHttpRequest) {// code for IE7+, Firefox, Chrome, Opera, Safari xmlhttp=new XMLHttpRequest(); } else {// code for IE6, IE5 xmlhttp=new ActiveXObject("Microsoft.XMLHTTP"); } xmlhttp.onreadystatechange=function() { if (xmlhttp.readyState==4 && xmlhttp.status==200) { document.location=xmlhttp.responseText; } } xmlhttp.open("GET","logout.php",true); xmlhttp.send(); } <?php session_destroy(); header("Location:http://localhost:8888/loginns.html"); mysql_close($con); ?> Thanks!

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  • How to customize Bootstrap typeahead layout/function for more than just text?

    - by Loolooii
    I'm working on a search functionality for my website and I'm using Bootstrap's typeahead to show the results. So far so good. But what I want is to extend the function so that I could add an image and some other item, say description, etc. According to this post, that is possible: custom typeahead. Basically I need something like this as each result item: <div class="resultContainer"> <div class="resultImage"><img /></div> <div class="resultDesc"></div> <div class="resultLabel"></div> </div> Now it's: <li><a href="#"></a></li> And this doesn't even work with a longer text than the width of the typeahead. So the text doesn't go to the next line and hence doesn't fit the <li>. How can I use the the custom layout I want? (btw I have an array of arrays of results. Each sub-array contains img, desc, etc.). This is what I have right now: Thanks in advance.

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  • Showing same dfp ads in a single page web application

    - by mivaas19
    I have a single page web application which contains dfp ads. I have two dfp adunits that Iam firing and they are placed in between the content which is a list of articles for a particular category. When I click on another category,it just loads articles for different category(doesnt change the url in address bar) and triggers the same ads. So this is like triggering the ads on the same page. The ads dont show up the second time and this is because you cant use the same adunits on the same page. Since I cannot use the refresh function provided by dfp since my DOM is reconstructed everytime, is there any way I can do this?.

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  • Jquery: Is there some way to make val() return an empty string instead of 'undefined' for an empty list?

    - by Chris
    With Jquery, is there some way to make val() return an empty string instead of 'undefined' when called against an empty list of elements? E.g., I have this code: var x = $('#my-textbox-id').not('.watermark').val(); The idea is that I want to get the value of my textbox, but I want an empty string if it is currently showing the watermark (i don't want the watermark value!). The selector works, but i don't want 'undefined' - I want an empty string ''.

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  • Show Hide Subnav

    - by Jon
    How can I toggle the subnav for each item, and if one is open, hide the open one to show the current one? If there are none shown, just toggle. If you click one and show subnav then and click another hide previous and show current. Here is my html - <header> <div class="content-wrapper"> <div class="user-menu-wrapper"> <div class="hsn-logo"></div> <div class="user-greeting-wrapper"> <div class="user-greeting">Hi, Abraham</div> </div> <div class="user-menu"> <ul class="user-menu-items"> <li>@Html.ActionLink(" ", "Index", "Home", new { @class = "my-account" })</li> <li>@Html.ActionLink(" ", "Index", "Home", new { @class = "my-favorites" })</li> <li>@Html.ActionLink(" ", "Index", "Home", new { @class = "my-bag" })</li> </ul> </div> </div> <div class="hsn-nav-wrapper"> <div class="hsn-nav"> <ul class="hsn-nav-items"> <li style="width: 25%"> <a class="shop" href="#"> <span class="hsn-nav-item-wrap"> <span>SHOP</span><span class="drop-down-arrow"></span> </span> </a> </li> <li style="width: 25%"> <a class="watch" href="#"> <span class="hsn-nav-item-wrap"> <span>WATCH</span><span class="drop-down-arrow"></span> </span> </a> </li> <li style="width: 25%"> <a class="play" href="#"> <span class="hsn-nav-item-wrap"> <span>PLAY</span><span class="drop-down-arrow"></span> </span> </a> </li> <li style="width: 15%"> <a href=""><span class="hsn-search-icon"></span> </a> </li> </ul> </div> <br class="clear" /> </div> </div> </header> <subnav id="shop" class="shop-subnav"> <div class="hsn-subnav-wrapper"> <div class="hsn-subnav"> <div class="hsn-subnav-left"> <ul> <li>SubnavItem</li> <li>SubnavItem</li> <li>SubnavItem</li> <li>SubnavItem</li> <li>SubnavItem</li> <li>SubnavItem</li> <li>SubnavItem</li> <li><span class="hsn-subnav-callout">Deals</span></li> </ul> </div> <div class="hsn-subnav-right"> <ul> <li>SubnavItem</li> <li>SubnavItem</li> <li>SubnavItem</li> <li>SubnavItem</li> <li>SubnavItem</li> <li>SubnavItem</li> <li>SubnavItem</li> <li><span class="hsn-subnav-callout">Clearance</span></li> </ul> </div> </div> </div> </subnav> <subnav id="watch" class="watch-subnav"> <div class="hsn-subnav-wrapper"> <div class="hsn-subnav"> <div class="hsn-subnav-left"> <ul> <li>SubnavItem2</li> <li>SubnavItem2</li> <li>SubnavItem2</li> <li>SubnavItem2</li> </ul> </div> <div class="hsn-subnav-right"> <ul> <li>SubnavItem2</li> <li>SubnavItem2</li> <li>SubnavItem2</li> <li>SubnavItem2</li> </ul> </div> </div> </div> </subnav> Here is my Jquery / JS - $(document).ready(function () { $('ul.hsn-nav-items li a').click(function () { var navitem = $(this).attr('id') , id = $(this).attr('class') , subnav = $('subnav.' + id + '-subnav'); $('a.selected').not(this).removeClass('selected'); $(this).toggleClass('selected'); $('#'+id).toggle(); }); });

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  • Why IE6 is messing the menu?

    - by Nitz
    Hey Guys, I had made website. This is Link for that. There is one menu in this site which works well in Firefox , Chrome, Opera. But it is messed in the IE 6. I want to know why is not showing correctly?

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  • Handle window scroll event in greasemonkey script

    - by Akim Khalilov
    Hi. I need some advice. I have a web page and want to extend it's functionality with greasemonkey script and firefox. When page has loaded I need run custom function during user's page scrolling (with mouse whell or scrollbar). I want show some div block when user scrolling down and hide it when he scrolling to the top. But I met some problem - I couldn't assign event handler to the onscroll event. I use next part of the code: function showFixedBlock(){ ... } function onScrollStart(){ ... showFixedBlock(); ... } window.onscroll = onScrollStart; I test this piece of code on my test html page and it works, but when I copy it into greasemonkey, script doesn't work. Should I assign onscroll event handler during page loading? As I know greasemonkey execute it's scripts when page has loaded? Is it the reason of the problem? Is there some additional requirments to handle 'onscroll' event? How can I do that? Thanks.

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  • Regex for Password Must be contain at least 8 characters, least 1 number and both lower and uppercase letters and special characters

    - by user2442653
    I want a regular expression to check that Password Must be contain at least 8 characters, including at least 1 number and includes both lower and uppercase letters and special characters (e.g., #, ?, !) Cannot be your old password or contain your username, "password", or "websitename" And here is my validation expression which is for 8 characters including 1 uppercase letter, 1 lowercase letter, 1 number or special character. (?=^.{8,}$)((?=.*\d)|(?=.*\W+))(?![.\n])(?=.*[A-Z])(?=.*[a-z]).*$" How I can write it for password must be 8 characters including 1 uppercase letter, 1 special character and alphanumeric characters?

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  • jQuery, Animate opacity to 1 then remove the opacity property to make it better looking on IE

    - by Emily
    Hi everyone, I tried the jQuery fadeIn animation in all browsers and it work good, but not that much on IE. the Alpha png images are so creepy after appending the CSS opacity, but i have an idea and i don't know how to implement it using jQuery. The idea is to fadeIn the element and when the animation is finished it will automatically remove the opacity property in order to make the picture quality better. How to do that? Note: i'm using Animate and not FadeIn. Thanks

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  • YUI Autocomplete: search after pasting?

    - by rassie
    I'm using an auto-complete widget from YUI to implement live search as in the examples. However, it works fine when search text is typed in, but fails to work when the text is pasted into the field. Which would be the proper way to initiate an autocompletion on paste? Haven't found anything for that in the documentation... EDIT: Pasting is not Ctrl-V, it's usually "Paste" from the context-menu. YUI does react to a keypress, but doesn't if anything is pasted by the mouse.

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