javascript Programming Glossary: oneHow do JavaScript closures work? http://stackoverflow.com/questions/111102/how-do-javascript-closures-work and completely failed. How would you explain it to someone with a knowledge of the concepts which make up closures e.g... both 'a' and 'b' . It is possible to create more than one closure function either by returning a list of them or by setting..
Access / process (nested) objects, arrays or JSON http://stackoverflow.com/questions/11922383/access-process-nested-objects-arrays-or-json Preliminaries In JavaScript there are only two actually one data types which can contain other data types objects and arrays..
event.preventDefault() vs. return false http://stackoverflow.com/questions/1357118/event-preventdefault-vs-return-false from executing after a certain event is fired I can use one of two techniques. I'll use jQuery in the examples but this.. return false is simpler shorter and probably less error prone than executing a method. With the method you have to remember..
Reference: Why does the PHP (or other server side) code in my Javascript not work? http://stackoverflow.com/questions/13840429/reference-why-does-the-php-or-other-server-side-code-in-my-javascript-not-wor not work Note This is a reference question. If you see one of the many questions fitting this pattern please close them.. a new HTTP request to the server. This can happen using one of three possible methods A link which causes the browser to..
jQuery Mobile: document ready vs page events http://stackoverflow.com/questions/14468659/jquery-mobile-document-ready-vs-page-events document ready and jQuery Mobile page events. Can someone tell me what is a real difference Why should document .ready.. What is the order of page events transition from one page to another How can I send data from one page to another.. from one page to another How can I send data from one page to another and is it possible to access a data from previous..
Prototypical inheritance - writing up [duplicate] http://stackoverflow.com/questions/16063394/prototypical-inheritance-writing-up Create two speedy and lazy hamsters then feed the first one speedy new Hamster lazy new Hamster speedy.found apple speedy.found..
How can I obfuscate JavaScript? http://stackoverflow.com/questions/194397/how-can-i-obfuscate-javascript which is decrypted at page load. That would probably be one of the most secure options but also a lot of work which may.. some string values and that would be easier.. but someone who really wanted those string values could easily decode them.. them . Encryption is the only way to truly prevent anyone from accessing your data and most people find that to be more..
var functionName = function() {} vs function functionName() {} http://stackoverflow.com/questions/336859/var-functionname-function-vs-function-functionname functionName I've recently started maintaining someone else's JavaScript code. I'm fixing bugs adding features and.. the pros and cons of each Is there anything that can be done with one method that can't be done with the other javascript.. and cons of each Is there anything that can be done with one method that can't be done with the other javascript function..
Does it matter which equals operator (== vs ===) I use in JavaScript comparisons? http://stackoverflow.com/questions/359494/does-it-matter-which-equals-operator-vs-i-use-in-javascript-comparisons to the equality operator except no type conversion is done and the types must be the same to be considered equal. Reference.. equality operators and and their evil twins and . The good ones work the way you would expect. If the two operands are of the.. types. For reference types and act consistently with one another except in a special case . var a 1 2 3 var b 1 2 3 var..
http://stackoverflow.com/questions/500431/javascript-variable-scope a globally scoped variable var a 1 global scope function one alert a local scope function two a alert a local scope again.. 'b' is NOT set in the constructor. These will print 1 8 one two 2 three four alert new Five .a six alert new Seven .a alert..
Why is using “for…in” with array iteration such a bad idea? http://stackoverflow.com/questions/500504/why-is-using-for-in-with-array-iteration-such-a-bad-idea for loop share improve this question The reason is that one construct... var a a 5 5 Perfectly legal JavaScript that resizes.. i Iterates over numeric indexes from 0 to 5 as everyone expects. can sometimes be totally different from the other.....
http://stackoverflow.com/questions/5874652/prop-vs-attr an attribute with the same name exists usually updating one will update the other but this is not the case for certain attributes..
Javascript closure inside loops - simple practical example http://stackoverflow.com/questions/750486/javascript-closure-inside-loops-simple-practical-example inside loops simple practical example Closures are one of those things which has been discussed a lot on SO but this.. value. for var j 0 j 3 j funcs j and now let's run each one to see It outputs this My value 3 My value 3 My value 3 Whereas.. i for var j 0 j 3 j funcs j and now let's run each one to see Since there is no block scope in JavaScript only function..
Memory leak risk in JavaScript closures http://stackoverflow.com/questions/11186750/memory-leak-risk-in-javascript-closures completely solved in IE9 either can't find the link ATM . One last thing I've also come to learn that IE manages the DOM outside..
Access / process (nested) objects, arrays or JSON http://stackoverflow.com/questions/11922383/access-process-nested-objects-arrays-or-json and `obj.name`. We could also use `data.items i .id`. One could also use for...in to iterate over arrays but there are..
How can I get jQuery to perform a synchronous, rather than asynchronous, AJAX request? http://stackoverflow.com/questions/133310/how-can-i-get-jquery-to-perform-a-synchronous-rather-than-asynchronous-ajax-re widget which provides standard extension points. One of them is the beforecreate function. It should return false..
Change the URL in the browser without loading the new page using JavaScript http://stackoverflow.com/questions/136458/change-the-url-in-the-browser-without-loading-the-new-page-using-javascript I'm sure there are plugins for other libraries as well. One thing to be careful of is colliding with ids on the page because..
jQuery Mobile: document ready vs page events http://stackoverflow.com/questions/14468659/jquery-mobile-document-ready-vs-page-events events triggered in a particular point of page execution. One of those page events is a pageinit event and we can use it like.. To override default settings bind them to mobileinit . One of a good examples of mobileinit usage is turning off ajax page..
jQuery Mobile: Markup Enhancement of dynamically added content http://stackoverflow.com/questions/14550396/jquery-mobile-markup-enhancement-of-dynamically-added-content appended to a list. This is done for performance reasons. One of a listview high points is a filtering functionality. Unfortunately.. Enhancement example http jsfiddle.net Gajotres m4rjZ One more thing you don't need to use a input element to create a..
Populating child dropdownlists in JSP/Servlet http://stackoverflow.com/questions/2263996/populating-child-dropdownlists-in-jsp-servlet select name dd3 option Please select parent option select One caveat is however that this may become unnecessarily lengthy..
http://stackoverflow.com/questions/2587345/javascript-date-parse Date.parse Case One new Date Date.parse Jul 8 2005 Output Fri Jul 08 2005 00 00..
How do I get the name of an object's type in JavaScript? http://stackoverflow.com/questions/332422/how-do-i-get-the-name-of-an-objects-type-in-javascript RegExp Object.prototype.toString.call 1 2 3 object Array One could write a short helper function such as function type obj..
XmlHttpRequest error: Origin null is not allowed by Access-Control-Allow-Origin http://stackoverflow.com/questions/3595515/xmlhttprequest-error-origin-null-is-not-allowed-by-access-control-allow-origin for CORS headers to signal that a cross domain XHR is OK. One is to send Access Control Allow Origin which if you were reaching..
jqgrid incorrect select drop down option values in edit box http://stackoverflow.com/questions/4469650/jqgrid-incorrect-select-drop-down-option-values-in-edit-box using form edit. There are two select boxes in the form. One select box is the country another select box is the state. The..
Can the jQuery UI Datepicker be made to disable Saturdays and Sundays (and holidays)? http://stackoverflow.com/questions/501943/can-the-jquery-ui-datepicker-be-made-to-disable-saturdays-and-sundays-and-holid i 1 return false natDays i 2 '_day' return true '' One built in function exists called noWeekends that prevents the..
Where do you include the jQuery library from? Google JSAPI? CDN? http://stackoverflow.com/questions/547384/where-do-you-include-the-jquery-library-from-google-jsapi-cdn continue this configuration until it makes sense not to. One thing worth pointing out... If you have a mixture of secure..
Most elegant way to clone a JavaScript object http://stackoverflow.com/questions/728360/most-elegant-way-to-clone-a-javascript-object the prototype but weren't enumerable in the first place. One solution might be to call the source object's constructor property..
Why is null an object and what's the difference between null and undefined? http://stackoverflow.com/questions/801032/why-is-null-an-object-and-whats-the-difference-between-null-and-undefined is known to exist but it's not known what the value is. One thing to remember is that null is not conceptually the same..
Using jQuery to test if an input has focus http://stackoverflow.com/questions/967096/using-jquery-to-test-if-an-input-has-focus property to add a border when the mouse is over them. One of the div s contains a form which using jQuery will keep the..
Catch browser's “zoom” event in JavaScript http://stackoverflow.com/questions/995914/catch-browsers-zoom-event-in-javascript it. I 脎e found two ways of detecting the zoom level. One way to detect zoom level changes relies on the fact that percentage..
Is it right to think of a Javascript Function Expression that uses the 'new' keyword as 'static' http://stackoverflow.com/questions/10406552/is-it-right-to-think-of-a-javascript-function-expression-that-uses-the-new-key deeper. I created a 'class' gameData that I only want ONE of doesn't need a constructor or instantiated. So I created..
How to associate each option button with their own individual marks? http://stackoverflow.com/questions/11199379/how-to-associate-each-option-button-with-their-own-individual-marks alteration that is CRITICAL to make because you only have ONE form element surrounding all of your questions each question's..
Get the value of checked checkbox? http://stackoverflow.com/questions/11599666/get-the-value-of-checked-checkbox is currently checked. EDIT To add their will only be ONE checked box. javascript checkbox share improve this question..
Consolidate stacked DOM formatting elements - contenteditable DIV http://stackoverflow.com/questions/16226671/consolidate-stacked-dom-formatting-elements-contenteditable-div that is to ignore selecting whole nodes but instead select ONE character at a time look at its formatting nuke and reapply..
HTML5 Canvas Resize (Downscale) Image High Quality? http://stackoverflow.com/questions/18922880/html5-canvas-resize-downscale-image-high-quality to build the smaller image they will just pick ONE pixel in the source and use its value for the destination. which..
Does it still make sense to use HTML comments on blocks of JavaScript? http://stackoverflow.com/questions/204813/does-it-still-make-sense-to-use-html-comments-on-blocks-of-javascript type text JavaScript some js code script Edit There is ONE situation I did encounter. Some code editors such as Dreamweaver..
Ajaxified Star Rating System is not Updating Correctly http://stackoverflow.com/questions/20833885/ajaxified-star-rating-system-is-not-updating-correctly of NIL values on the rest. I only want it to update that ONE object. How can I submit the appropriate Book ID in the Javascript..
submit multiple forms to same page http://stackoverflow.com/questions/2368593/submit-multiple-forms-to-same-page can work is if you have multiple 3 whatever forms and only ONE Of them has file inputs. If that's the case then what you can..
jQuery toggle - Close all except this http://stackoverflow.com/questions/4656941/jquery-toggle-close-all-except-this That means that all elements could be closed BUT ONLY ONE could be opened at the same time. I tried to just put jQuery..
What good ways are there to prevent cheating in JavaScript multiplayer games? http://stackoverflow.com/questions/5250403/what-good-ways-are-there-to-prevent-cheating-in-javascript-multiplayer-games nothing you can do to be absolutely secure. You have only ONE option to absolutely avoid hackers. That is to build your own..
Shortest function for reading a cookie in JavaScript http://stackoverflow.com/questions/5639346/shortest-function-for-reading-a-cookie-in-javascript this question This will only ever hit document.cookie ONE time. Every subsequent request will be instant. function var..
http://stackoverflow.com/questions/5824615/jquery-when-callback-for-when-all-deferreds-are-no-long-unresolved-either-r Deferreds resolve or reject its master Deferred as soon as ONE of the Deferreds is rejected. If the master Deferred is resolved..
Determining what jQuery .ajax() resolves a string of redirects to http://stackoverflow.com/questions/6767618/determining-what-jquery-ajax-resolves-a-string-of-redirects-to
send javaScript variable to php variable [duplicate] http://stackoverflow.com/questions/8191124/send-javascript-variable-to-php-variable and client side executions. So now I simply want to send ONE variable script type text javascript function scriptvariable..
How do I build more than 1 drop-down selector menu on the same table/layer in Google Fusion Table? http://stackoverflow.com/questions/9399777/how-do-i-build-more-than-1-drop-down-selector-menu-on-the-same-table-layer-in-go on and off multiple layers. For each layer I've also built ONE drop down select menu allowing the viewer to filter the displayed..
How to add two Google charts on the one page? http://stackoverflow.com/questions/9888920/how-to-add-two-google-charts-on-the-one-page variables for EACH of your charts are defined within the ONE drawChart function. Here is a working example just copy and..
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