Update contributing docs for js-sys

guide/src/contributing/js-sys/adding-more-apis.md

@@ -1,11 +1,18 @@
 # Adding Support for More JavaScript Global APIs
 
-We've got a [GitHub issue][issue] tracking the remaining APIs that still need to
-be added to the `js-sys` crate, and we'd love your help adding them! The steps
-to follow are:
+As of 2018-09-24 we've [added all APIs][issue] in the current ECMAScript
+standard (yay!). To that end you'll hopefully not find a missing API, but if you
+do please feel free to file an issue!
 
-* [ ] Comment on the issue saying which thing you are going to make bindings for
-  (so that we don't accidentally duplicate effort).
+We currently add new APIs added to ECMAScript that are in [TC39 stage 4][tc39]
+to this crate. If there's a new API in stage 4, feel free to file an issue as
+well!
+
+### Instructions for adding an API
+
+* [ ] Find the `wasm-bindgen` issue for the API you'd like to add. If this
+  doesn't exist, feel free to open one! Afterwards be sure to comment on the
+  issue to avoid duplication of work.
 
 * [ ] Open the [MDN
   page](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects)
@@ -19,9 +26,10 @@ to follow are:
 
 * [ ] Add a test for the new binding to `crates/js-sys/tests/wasm/MyType.rs`
 
-* [ ] Run the JS global API bindings tests with `cargo test -p js-sys --target
-  wasm32-unknown-unknown`
+* [ ] Run the [JS global API bindings tests][test]
 
 * [ ] Send a pull request!
 
 [issue]: https://github.com/rustwasm/wasm-bindgen/issues/275
+[tc39]: https://tc39.github.io/process-document/
+[test]: testing.html

guide/src/contributing/js-sys/index.md

@@ -32,12 +32,8 @@ pub fn timed(callback: &js_sys::Function) -> f64 {
 }
 ```
 
-The `js-sys` crate isn't quite 100% feature complete yet. There are still some
-JavaScript types and methods that we don't have bindings for. If you'd like to
-help out check out [the contribution documentation][contrib].
-
-Also, as mentioned above, the `js-sys` crate doesn't contain bindings to any Web
-APIs like [`document.querySelectorAll`][mdn-qsa]. These will be part of the
+The `js-sys` crate doesn't contain bindings to any Web APIs like
+[`document.querySelectorAll`][mdn-qsa]. These will be part of the
 [`web-sys`](./web-sys.html) crate.
 
 [MDN]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects
@@ -48,4 +44,3 @@ APIs like [`document.querySelectorAll`][mdn-qsa]. These will be part of the
 [web-sys-contributing]: https://rustwasm.github.io/wasm-bindgen/web-sys.html
 [web-sys-issues]: https://github.com/rustwasm/wasm-bindgen/issues?q=is%3Aissue+is%3Aopen+label%3Aweb-sys
 [mdn-date-now]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/now
-[contrib]: https://github.com/rustwasm/wasm-bindgen/issues/275

guide/src/contributing/js-sys/testing.md

@@ -10,4 +10,4 @@ cargo test --target wasm32-unknown-unknown
 ```
 
 These tests are largely executed in Node.js right now via the
-`wasm-bindgen-test` framework. More documentation on the framework coming soon!
+[`wasm-bindgen-test` framework](../../wasm-bindgen-test/index.html)