Honor browserslist in package.json for Babel, Autoprefixer, etc.

[ethanroday]

Rather than hard-code a list of browsers in babel and webpack configs, it would be great if the CLI just added a default browserslist entry in package.json that the user could then edit. For those of us developing for, say, UC Browser for Android, there's currently no recourse to get the full set of required prefixes other than forking this repo and altering the webpack config manually.

[lukeed]

@ethanroday I'm not very familiar with all these config options, but is there a convention for passing specific browser targets for Babel?

I ask because browserlist is an array of browser conditions -- but the babel-preset-env also accepts something like:

require('babel-preset-env')({
  targets: {
    chrome: 52
  },
  browsers: [ 'last 2 versions']
});

Should we even allow targets like that? Do you (personally) care if that's not an option?

Appreciate any insight!

[rkostrzewski]

This probably can shed some light. Seems like it was just left there and browserslist can handle anything that browser specific targets (i.e. targets: { chrome: ... } }) can (most likely apart from node but we don't have to care).

[lukeed]

Yeah, looks like anything can be written as a browser string. I don't personally think there's a need for the additional target keys, but I'm asking just in case.

[developit]

I like the idea that this gives people a single source of truth for defining their support targets.

[alex-shamshurin]

So does it support .browserlistrc ?

[developit]

No, only the package.json option.

[reznord]

for now 😛 (hopefully)