This is a great thing to start looking into. I myself have definitely been burned in the past because something unexpected got coerced into something equally unexpected, resulting in behaviour that is without-a-doubt unexpected.
So thanks to the folks getting this off the ground! On Mon, 7 Oct 2019 at 13:06, Dave Townsend <dtowns...@mozilla.com> wrote: > JavaScript powers a lot of Firefox but unlike the other languages that ship > code in our product JavaScript uses a dynamic type system. Types for > variables are decided at execution time and can change as new values are > assigned to them. This leaves you open to accidentally passing the wrong > kind of data around your code. Easy to do when APIs are changed on the > other side of the tree. > > Flow and Typescript have gained prominence recently as tools that add > static types on top of JavaScript giving you a build time check (note: no > runtime checks) to see if the types you’re using look correct. A number of > us have used these tools successfully in side projects and want to see if > using a tool like this would be beneficial in Firefox. > > A first experiment towards understanding this has just landed ( > https://hg.mozilla.org/integration/autoland/rev/1dd081553a3a). > Specifically > Greg Tatum has added TypeScript <https://www.typescriptlang.org/> type > annotations and configuration to the JavaScript code in the > devtools/client/performance-new directory. > > The mode of TypeScript we’re testing involves annotating types with > comments, the JavaScript code itself is just normal JavaScript. All of the > TypeScript bits live in comments so there is no build step and we’re also > not adding any automated tests to verify the types in CI for this > experiment. > > For the time being the perf tools team will just be checking the types > locally before committing. This will give us an idea of the benefits on > real in-tree code without any impact outside of the team. > > If you have any concerns with this or want to know more please let us know. > > > Dave > _______________________________________________ > dev-platform mailing list > dev-platform@lists.mozilla.org > https://lists.mozilla.org/listinfo/dev-platform > _______________________________________________ dev-platform mailing list dev-platform@lists.mozilla.org https://lists.mozilla.org/listinfo/dev-platform
