Update README.md (#475)

Signed-off-by: Ian Hunter <[email protected]>

src/js/README.md

@@ -6,9 +6,7 @@ nav_order: 0
 
 # Javascript
 
-GNOLL is currently supported in Node as a console level application.
-It is **not** supported in the browser yet. 
-We appreciate contributions that can change this.
+GNOLL is currently supported in Node as a console level application and as a browser package.
 
 Emscripten does not allow file writing [ref](https://stackoverflow.com/a/54384808), 
 at least via the same mechanism as the other languages, 
@@ -22,14 +20,19 @@ Output is currently only via stdout.
 sudo apt-get install emscripten nodejs
 ```
 
-### Build
+### Run (Console)
 
 ```bash
 make javascript
 ```
 
-### Run
-
 ```bash
 node build/js/a.out.js
 ```
+
+### Run (Browser)
+
+Build with `make all jsweb`
+Start a web server (e.g. `python3 -m http.server 8003 &> /dev/null &`)
+Load index.html (http://localhost:8003/index.html in the previous example).
+Provide notation in the textbox and press the "Roll" button. Output is printed to a separate div.