880083 - Use const instead of var in code samples

Status: RESOLVED WONTFIX

(Developer Documentation Graveyard :: Add-ons, defect, P5)

Description

[David Bruant]

:: Developer Documentation Request

      Request Type: Correction
     Gecko Version: unspecified
 Technical Contact: 

:: Details

In JavaScript var-declaration has some known flaws. ES6 standardizes let and const which are already in Firefox (and available to addons). If I've been following well, with let and const, most variables have all the right reasons to be declared with const and var can be retired.
It could be good to show the way to devs in jetpack examples.

No rush of course, but to keep in mind.

Reference:
http://ariya.ofilabs.com/2013/05/es6-and-block-scope.html
http://blog.lassus.se/2013/05/defsjs.html

Comment 1

[Eric Shepherd [:sheppy]]

Will this break compatibility with other browsers? With older but still relatively recent browsers?

Comment 2

[David Bruant]

I meant to do that only for Jetpack-related doc.
Webdev/app doc will keep using 'var' for a looooooooooooooooooooooooooooooong time :-)

I felt Developer Documentation/add-ons was the proper product/component combo. Feel free to re-categorize if I'm mistaken.

Comment 3

[Masatoshi Kimura [:emk]]

Actually 'const' is *less* efficient than 'var' until we support ES6 const semantics.

Comment 4

[Jean-Yves Perrier [:teoli]]

Closing this, overkill. And const has not yet been updated. And JetPack is legacy technology now.