JavaScriptのベストプラクティス大会 jsEdu

Peter Pan (@peterhil@ravenation.club) @peterhil

To learn what Javascript really is, watch these videos: http://yuiblog.com/crockford/ #jsEdu

David Strauß @stravid

JS tip: Debugging with Firebug, use string substitution patterns in console.log("a: %o, b: %o", a, b); easier editing & more readable #jsEdu

@scottpalmer

Try to use Array.Join instead of string concatenation, it's faster and doesn't create extra string objects. #jsEdu

José @jamcc17

not rely on eval (), review better alternatives agree the circumstances #jsEdu

Jon Randy @jonrandy

Always try to define vars at the top of functions to avoid confusion with variables being 'hoisted' #jsEdu

Stefano Verna @steffoz

String.prototype.reverse = function () { return this.split('').reverse().join(''); } #jsEdu

Yuya Saito @cssradar

Looks as if it was written by the same person, not just JS, these patterns could be same in css | #jsEdu | http://t.co/DqdrHtu

paulwallace @paulwallace

Understand the difference between == and === 3 == "3" is true, 3 === "3" is false === compares value AND type #jsEdu

@jyoseph

Avoiding implied typecasting! Always use the === and !== operators that check the values & the type of the expressions you compare #jsEdu

@jyoseph

Use curly braces and be loved by friends and colleagues alike! Omit them and die a cold and lonely death. #jsEdu

Keegan Watkins @keeganwatkins

Never append elements in a loop - build an HTML string in the loop and append all at once #jsEdu

Keegan Watkins @keeganwatkins

the second argument to String.replace can be a function used to convert the value. #jsEdu

Matt Anderton @SLCMatty

forget everything you think you know about variable scope! #jsEdu

Jon Hume @humedini

Always feature detect rather than browser detect, you know it makes sense :) #jsEdu

@oldschooller

If you spot the use of eval() in your code, remember the mantra “eval() is evil.” #jsEdu

Don Whiteside™ @donw

Checking DOM collection sizes can be expensive. Cache the length of your for loop for an easy but effective performance improvement #jsEDU

jajarvin @jajarvin

@nettuts I am new in the area of JavaScript. I really like to have this book. #jsEdu

@Fcalderan

before writing a single line of javascript, seriously think if you can reach the same result in newest browser with only CSS =) -- #jsEdu

Adrian Png 🧡🕯️ @fuzziebrain

Comment your code - appropriately - and keep them up-to-date. #jsEdu

Pobzeb Armerding @pobzeb

Always end each JS statement with a ";" #jsEdu

nato24 @nato24

Avoid using closures inside loops #jsEdu

Paul Byers @cidermonk3y

Jscript tip: Avoid using eval() function, it slows down your code and can compromise your security, think XSS-remember, don't be eval #jsEdu

@araniajain

Always end your JS statement with a ";" #jsEdu

Roger Wakeman @rgrwkmn

Use callbacks in your functions/classes. Makes them useful in more circumstances w/o modification. #jsEdu #javascript

@_cjo_

if you're writing javascript, you really should be using jslint! #jsEdu