JavaScriptのベストプラクティス大会 jsEdu

Cory Evan Wright @BeSublime

Always put the opening brace of an if statement, function, etc. on the same line as the beginning of the statement or declaration. #jsEdu

Vipul Limbachiya @vipullimbachiya

Declare variable outside the for statement which is used for each loop #jsEdu

Tom Brander @dartdog

Javascript the language for web mobile apps "JavaScript Patterns" from O'Reilly Books http://is.gd/fYJ4l #jsEdu

Nick Plekhanov @nickplekhanov

Avoid sync Ajax calls as it will wait for the request to return before continuing,while async mode runs the request in the background #jsEdu

Vipul Limbachiya @vipullimbachiya

don't change variable's type after declaration ie. var test = "hello"; test = 10; #jsEdu

Vipul Limbachiya @vipullimbachiya

Try to do feature detection and not browser detection #jsEdu

Scott Allen @svallen

When using forms you can do $("input[name='id']").val(); instead of always needing to put and id on the input tags. #jsEdu

Chris Maggs @maggsweb

When outputting HTML using JavaScript, always escape the forward slash ('/') by placing a backward slash ('\') in front of it. #jsEdu

Charasan @charasan

Whenever possible, place scripts at the bottom of your page, not the top. Avoid blocking the DOM loading. #jsEdu

Anthony @Johnner

Always wrap your if-else statements in braces {}. Even if its only one operator in condition: if(..){...} else{...} #jsEdu

CyberSpektre @CyberSpektre

To speed up the pages render, put the scripts (when possible) at the bottom of body (JS scripts block parallel downloads). #jsEdu @nettuts

Anderson Juhasc @Anderson_Juhasc

Use immediate invocations #javascript (function() { }()); #jsEdu

tekbirdr @tekbirdr

Always use an object literal -- {} -- instead of the new Object() constructor. #jsEdu

stagas @stagas

Use 'return this' when you want to chain methods of an object similar to jQuery. #jsEdu

Lupo Montero @lupomontero

Wrap code inside "for in" loops in hasOwnProperty() conditional 2 make sure u exclude properties from the prototype chain #jsEdu

Carlos Cano @canogt

Preferred way to declare objects and arrays: var person = {}, keys = []; #jsEdu

kartik sehgal @kartiksehgal

@nettuts always minimize your JavaScript (using compression tools like YUI compressor) on deployment & improve the page performance #jsEdu

Roger Wakeman @rgrwkmn

parseInt on strings starting with 0 will not return what you expect. Try "01" through "0100" in a loop to see. #jsEdu #javascript

tdarb @bradtaunt

Use [] Instead of New Array() #jsEdu

Martin Koistinen @mkoistinen

Create local copies of objects or functions used frequently in the body of a function to reduce the time required for name-lookups. #jsEdu

Zach Mau @zachmau

JavaScript is case sensitive | Use defer attrib. for IE scripts, Firefox 3.5 also supports | Use try-catch to prevent error display #jsEdu

Mike Kretz @kretzm

Make sure to always comment your code. I need to understand it too! #jsEdu

Dean Peterson @dpeterson_1

declare all variables with "var" @ the start of every JavaScript function. #jsEdu

Dean Peterson @dpeterson_1

Live and Breath "JavaScript: The Good Parts" by Douglas Crockford. #jsEdu

@andredublin

With scoping and hositing, always declare your varialbes with a var statment, and that it be at the top of your function. #jsEdu