docs: Clarify WASM restrictions

Author: Stranger6667

bindings/javascript/README.md

@@ -132,6 +132,8 @@ The `data-css-inline="ignore"` attribute also allows you to skip `link` and `sty
 </script>
 ```
 
+**NOTE**: WASM module currently lacks support for fetching stylesheets from network or filesystem.
+
 ## Performance
 
 `css-inline` is powered by efficient tooling from Mozilla's Servo project and significantly outperforms other JavaScript alternatives in terms of speed.

bindings/javascript/wasm/README.md

@@ -15,6 +15,10 @@ This is the **WebAssembly** module for [`css-inline`](https://github.com/Strange
 
 If you'd like to try `css-inline`, you can check the WebAssembly-powered [playground](https://css-inline.org/) to see the results instantly.
 
+## Restrictions
+
+WASM module currently lacks support for fetching stylesheets from network or filesystem.
+
 ## License
 
 This project is licensed under the terms of the [MIT license](https://opensource.org/licenses/MIT).