support custom URL loaders

[graingert]

similar to #9 but for:

background-url: url("./path/to/image.png");

[graingert]

obviating the need for https://www.npmjs.com/package/resolve-url-loader which currently uses source maps to fix url()s that are relative to the source .scss module but not the compiled .css file.

[chriseppstein]

So, for node-sass users, I wrote eyeglass and one of it's main features is an entire solution around exposing assets for installation into an application from source locations in a npm module or application and assigning the right url to them according to application configuration.

https://github.com/sass-eyeglass/eyeglass#working-with-assets

Before Eyeglass, Compass provided this capability in ruby sass.

I think this feature would be a good addition to Sass it would help standardize the implementation of asset helper tools and provide a consistent way for build pipeline integrations to address urls and imports in a holistic way and without forcing authors to opt in to a specific solution in order to interoperate.

[nex3]

cc @xzyfer

If we do this, we'd need to do it consistently across implementations.

[xzyfer]

Agreed.

…

On 21 Nov. 2017 12:10 pm, "Natalie Weizenbaum" ***@***.***> wrote: cc @xzyfer <https://github.com/xzyfer> If we do this, we'd need to do it consistently across implementations. — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#195 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AAjZWGS99C6wWlXdW4-SXPcFzJRoskv1ks5s4iLwgaJpZM4Qkggn> .

[graingert]

Here's the libsass issue: sass/libsass#532

…

On 21 Nov 2017 02:38, "Michael Mifsud" ***@***.***> wrote: Agreed. On 21 Nov. 2017 12:10 pm, "Natalie Weizenbaum" ***@***.***> wrote: > cc @xzyfer <https://github.com/xzyfer> > > If we do this, we'd need to do it consistently across implementations. > > — > You are receiving this because you were mentioned. > Reply to this email directly, view it on GitHub > <#195 (comment)>, or mute > the thread > <https://github.com/notifications/unsubscribe-auth/AAjZWGS99C6wWlXdW4- SXPcFzJRoskv1ks5s4iLwgaJpZM4Qkggn> > . > — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#195 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AAZQTKnvJH_KbOC-XlzyRt7fV9bjAhfoks5s4je2gaJpZM4Qkggn> .

[nex3]

Discussion of the design for this loader should happen at sass/sass#2535. This issue will track the eventual implementation and the Dart API.