[Koha-devel] ES6 usage in the staff client

[Paul A]

[apologies for top-posting]  All our cataloguers' work stations use 
Opera (v.44) which (from dev.opera):

"Opera now [version 29] supports ES6 classes in strict mode, providing 
the following features: prototype-based inheritance, constructors, super 
calls, instance methods, and static methods."

Can you confirm that "strict" mode (for whatever values that might have) 
is what you have in mind?

Thanks
-- 
Paul
Tired old sys-admin

On 2017-08-03 07:23 PM, Jesse wrote:
> As part of my work with Preact (and previous work with React), I've been 
> unsure what to do about these libraries' enthusiasm for ES6.
> 
> If you're not familiar, ES6 (or ES2015) is a recent, major update to the 
> JavaScript standard, and brings in a number of improvements to the 
> language. Many of these make small parts of JS development a bit more 
> pleasant, but the most relevant addition is native class support.
> 
> These built-in classes have been embraced by a lot of modern JS 
> libraries, including Preact. The commonly accepted way to write code in 
> this libraries depends on support for classes, either from the browser 
> itself or a transpiler like Babel. To use Preact, we have two options:
> 
>    * Use ES6 classes. This will work in Firefox 45+ (which includes two 
> ESR releases), Chrome 42+, Edge and Safari 9 [1][2]. I believe this is a 
> very reasonable set of browsers, for the staff client.
>    * Use a shim for ES3 support (see [3] for an example of how this 
> might work). This can be done, but locks us to an older and less-used 
> way of developing on Preact/React.
> 
> I strongly prefer the first option, but would like your feedback.
> 
> [1] http://kangax.github.io/compat-table/es6/#test-class (Check "show 
> obsolete platforms", and get ready for your browser to slow down.)
> [2] http://caniuse.com/#feat=es6-class (This is pessimistic; FF has had 
> support since version 45.)
> [3] https://github.com/developit/preact-in-es3/blob/master/index.js