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javascript Programming Glossary: you'llWhat is the difference between a function expression vs declaration in Javascript? [duplicate] http://stackoverflow.com/questions/1013385/what-is-the-difference-between-a-function-expression-vs-declaration-in-javascrip you try to call a function expression before it's loaded you'll get an error But if you call a function declaration it'll always..
Origin is not allowed by Access-Control-Allow-Origin http://stackoverflow.com/questions/10143093/origin-is-not-allowed-by-access-control-allow-origin Allow Origin This will allow cross domain AJAX. In PHP you'll want to modify the response like so php header 'Access Control..
Can I lookup the IP address of a hostname from javascript? http://stackoverflow.com/questions/102605/can-i-lookup-the-ip-address-of-a-hostname-from-javascript or ip addresses in the javascript standard library. So you'll have to access some external service to look up hostnames for..
Object comparison in JavaScript [duplicate] http://stackoverflow.com/questions/1068834/object-comparison-in-javascript Known issues well they have very low priority probably you'll never notice them objects with different prototype structure..
How does “this” keyword work within a JavaScript object literal? http://stackoverflow.com/questions/133973/how-does-this-keyword-work-within-a-javascript-object-literal if you have inner functions and they're used as callbacks you'll be invoking them as functions and this will be bound to the..
How do I “think in AngularJS” if I have a jQuery background? http://stackoverflow.com/questions/14994391/how-do-i-think-in-angularjs-if-i-have-a-jquery-background for the jQuery. But don't let jQuery become a crutch or you'll never master AngularJS. 3. Always think in terms of architecture..
jQuery animate backgroundColor http://stackoverflow.com/questions/190560/jquery-animate-backgroundcolor is only 4kb so much cheaper than the UI library. Of course you'll want to use a decent version of the plugin and not some buggy..
How can I obfuscate JavaScript? http://stackoverflow.com/questions/194397/how-can-i-obfuscate-javascript trouble . If you're trying to protect your source maybe you'll decide that it's worth your while just to make your code harder..
When is JavaScript's eval() not evil? http://stackoverflow.com/questions/197769/when-is-javascripts-eval-not-evil is a pretty minor risk I believe. As for performance you'll have to weight that against ease of coding. It is my opinion..
JavaScript get clipboard data on paste event (Cross browser) http://stackoverflow.com/questions/2176861/javascript-get-clipboard-data-on-paste-event-cross-browser in some browsers at least . Note also that in Firefox 2 you'll need to place the textarea in the parent document rather than..
Check if Internet Connection Exists with Javascript? http://stackoverflow.com/questions/2384167/check-if-internet-connection-exists-with-javascript local server. Whatever server you're making the request to you'll need to be able to respond to the HEAD request that of course..
Is javascript guaranteed to be single-threaded? http://stackoverflow.com/questions/2734025/is-javascript-guaranteed-to-be-single-threaded function l.value 'resize n' script Hit alert and you'll get a modal dialogue box. No more script executes until you..
How do I send a cross-domain POST request via JavaScript? http://stackoverflow.com/questions/298745/how-do-i-send-a-cross-domain-post-request-via-javascript to have your client set the content type it is sending so you'll need to allow that as well. MDN has a great write up about HTTP..
IE/Chrome: are DOM tree elements global variables here? http://stackoverflow.com/questions/3434278/ie-chrome-are-dom-tree-elements-global-variables-here with a clashing name and you forget to declare it var you'll get an error in IE as it tries to assign the value to the element..
Good tutorial for using HTML5 History API (Pushstate?) http://stackoverflow.com/questions/4015613/good-tutorial-for-using-html5-history-api-pushstate Developer Network page on this functionality is all you'll need https developer.mozilla.org en DOM Manipulating_the_browser_history..
http://stackoverflow.com/questions/5874652/prop-vs-attr checkbox is checked with jQuery Look on Stack Overflow and you'll commonly find the following suggestions if #cb .attr checked..
Using Rails 3.1, where do you put your “page specific” javascript code? http://stackoverflow.com/questions/6167805/using-rails-3-1-where-do-you-put-your-page-specific-javascript-code the same code on 8 of the pages on the site. In fact you'll never have to include manual script tags on your site anywhere..
Most elegant way to clone a JavaScript object http://stackoverflow.com/questions/728360/most-elegant-way-to-clone-a-javascript-object method. In addition to non enumerable attributes you'll encounter a tougher problem when you try to copy objects that..
http://stackoverflow.com/questions/934012/get-image-data-in-javascript encoded image. Note that the image must be fully loaded or you'll just get back an empty black transparent image. It would be.. around 3.5 of Firefox so if you want to support that you'll need to check the compatibility. If the encoding is not supported..
How to create a GUID / UUID in Javascript? http://stackoverflow.com/questions/105034/how-to-create-a-guid-uuid-in-javascript of the local computer that browsers do not expose. You'll need to use OS specific services like ActiveX http p2p.wrox.com..
Large numbers erroneously rounded in Javascript http://stackoverflow.com/questions/1379934/large-numbers-erroneously-rounded-in-javascript Just try to enter 714341252076979033 to fbug's console. You'll see the same 714341252076979100. See this blog post for details..
How do I “think in AngularJS” if I have a jQuery background? http://stackoverflow.com/questions/14994391/how-do-i-think-in-angularjs-if-i-have-a-jquery-background cool. 5. Conceptually directives are not packaged jQuery You'll often hear only do DOM manipulation in a directive . This is..
http://stackoverflow.com/questions/1510778/are-javascript-arrays-sparse objects if using an actual array would be inefficient. You'll have to ask someone with more knowledge about specific implementations..
JavaScript: How to detect that the Internet connection is offline? http://stackoverflow.com/questions/189430/javascript-how-to-detect-that-the-internet-connection-is-offline connection as a whole may be more trouble than it's worth. You'll have to weight these options out for your specific app. share..
Difference between dates in JavaScript http://stackoverflow.com/questions/1968167/difference-between-dates-in-javascript minutes by 60 then days by dividing hours by 24 etc. You'll note that I provided some values for the second Date object...
How do I uniquely identify computers visiting my web site? http://stackoverflow.com/questions/216542/how-do-i-uniquely-identify-computers-visiting-my-web-site the browser cookies does not remove the flash cookies. You'll need to build a small hidden flash movie to read and write them...
Populating child dropdownlists in JSP/Servlet http://stackoverflow.com/questions/2263996/populating-child-dropdownlists-in-jsp-servlet a flash of content which may be bad for User Experience. You'll also need to retain the other fields in the same form based.. fields in the same form based on the request parameters. You'll also need to determine in the servlet whether the request is..
How to check for undefined or null variable in javascript http://stackoverflow.com/questions/2559318/how-to-check-for-undefined-or-null-variable-in-javascript between two cases 1 Undefined variables like 'foo'. You'll get an error if you access an undefined variable in any context..
How to output integers with leading zeros in JavaScript [duplicate] http://stackoverflow.com/questions/2998784/how-to-output-integers-with-leading-zeros-in-javascript You're asking for zero padding Not really rounding. You'll have to convert it to a string since numbers don't make sense..
Difference between single quotes and double quotes in Javascript [duplicate] http://stackoverflow.com/questions/3149192/difference-between-single-quotes-and-double-quotes-in-javascript quotes javascript quotes share improve this question You'll want to use single quotes where you want double quotes to appear..
What's the best way to define a class in JavaScript? [closed] http://stackoverflow.com/questions/387707/whats-the-best-way-to-define-a-class-in-javascript of approximating class like functionality in JavaScript. You'll want to check out at least Prototype and jQuery . Deciding which..
How do I serialize a DOM to XML text, using JavaScript, in a cross browser way? http://stackoverflow.com/questions/43455/how-do-i-serialize-a-dom-to-xml-text-using-javascript-in-a-cross-browser-way this question You can use doc.xml in internet exlporer. You'll get something like this function xml2Str xmlNode try Gecko and..
how to get GET and POST variables with JQuery? http://stackoverflow.com/questions/439463/how-to-get-get-and-post-variables-with-jquery on PHP as well var _GET php echo json_encode _GET Note You'll need PHP version 5 or higher to use the built in json_encode..
Recommended Vim plugins for JavaScript coding? [closed] http://stackoverflow.com/questions/4777366/recommended-vim-plugins-for-javascript-coding doctorjs.git Go inside DoctorJS dir and make install You'll also need the make app installed but this is very basic . There're..
Getting the closest string match http://stackoverflow.com/questions/5859561/getting-the-closest-string-match solution parameters say a lot about this type of problem. You'll notice the optimized score was 44 and the best possible score..
Highlight text range using JavaScript http://stackoverflow.com/questions/6240139/highlight-text-range-using-javascript to set the selection and then call document.execCommand . You'll need to make the document temporarily editable in non IE browsers..
How to change/remove CSS classes definitions at runtime? http://stackoverflow.com/questions/730048/how-to-change-remove-css-classes-definitions-at-runtime you want. PPK has a quick tour of this on quirksmode.org . You'll want to use document.styleSheets i .cssRules which is an array..
For each in an array. How to do that in JavaScript? http://stackoverflow.com/questions/9329446/for-each-in-an-array-how-to-do-that-in-javascript a.length index console.log a index 3. Use for in correctly You'll get people telling you to use for in but that's not what for..
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