Hi, I recently converted a gadget on frwikt to ES6 syntax but despite specifying the 'requiresES6' option in the Gadgets-definition page, I get this error: "JavaScript parse error (scripts need to be valid ECMAScript 5): Parse error: Missing ; before statement in file 'MediaWiki:Gadget-CreerNouveauMot.js' on line 55". The thing is, it works on at least another one. What am I doing wrong? Thanks for your help.
Topic on Extension talk:Gadgets
Here are some links:
- Gadgets definition: fr:wikt:MediaWiki:Gadgets-definition#Création
- Gadget that does not work: fr:wikt:MediaWiki:Gadget-CreerNouveauMot.js
- Gadget that does work: fr:wikt:MediaWiki:Gadget-Barre de luxe.js
So, new development, it seems that I get this error only when the "default" option is active as well… Are there any compatibility issues between these two options that I am not aware of? I looked at the documentation but found nothing relating to this topic.
Yes, you can't enable an ES6-only gadget by default as by default implies all users/skins/browsers, whereas by definition it would fail in ES5 browers where we do load other gadgets and stylesheets. This leads to compatibility issues, dependency problems, and code complexity that developers likely wouldn't test well given it doesn't affect their own browsers. Such blind spots create inverse incentives, where the "easy" and default behaviour is to create experiences that aren't accessible through no fault of your own.
The requiresES6 feature is a temporary option to allow experimental opt-in gadgets to start using this until we're ready to drop ES5 support for Grade A. See also Compatibility and T178356.
Makes sense, thanks for your answer :) Unless I’ve missed it, I think it should be specified explicitely in the extension’s documentation so anyone can know before finding out too late.