docs: Mention playground

Author: Stranger6667

README.md

@@ -42,6 +42,10 @@ into:
 - Supports HTML5 & CSS3
 - Bindings for [Python](https://github.com/Stranger6667/css-inline/tree/master/bindings/python), [Ruby](https://github.com/Stranger6667/css-inline/tree/master/bindings/ruby), [JavaScript](https://github.com/Stranger6667/css-inline/tree/master/bindings/javascript), [C](https://github.com/Stranger6667/css-inline/tree/master/bindings/c), and a [WebAssembly](https://github.com/Stranger6667/css-inline/tree/master/bindings/javascript/wasm) module to run in browsers.
 
+## Playground
+
+If you'd like to try `css-inline`, you can check the WebAssembly-powered [playground](https://css-inline.org/) to see the results instantly.
+
 ## Installation
 
 To include it in your project, add the following line to the dependencies section in your project's `Cargo.toml` file:

bindings/c/README.md

@@ -39,6 +39,10 @@ into:
 - Works on Linux, Windows, and macOS
 - Supports HTML5 & CSS3
 
+## Playground
+
+If you'd like to try `css-inline`, you can check the WebAssembly-powered [playground](https://css-inline.org/) to see the results instantly.
+
 ## Install
 
 The C bindings are distributed as a header (`css_inline.h`) along with a dynamic library (`libcss_inline.so`).

bindings/javascript/README.md

@@ -40,6 +40,10 @@ into:
 - Works on Linux, Windows, and macOS
 - Supports HTML5 & CSS3
 
+## Playground
+
+If you'd like to try `css-inline`, you can check the WebAssembly-powered [playground](https://css-inline.org/) to see the results instantly.
+
 ## Installation
 
 ### Node.js

bindings/javascript/wasm/README.md

@@ -11,6 +11,10 @@
 
 This is the **WebAssembly** module for [`css-inline`](https://github.com/Stranger6667/css-inline)
 
+## Playground
+
+If you'd like to try `css-inline`, you can check the WebAssembly-powered [playground](https://css-inline.org/) to see the results instantly.
+
 ## License
 
 This project is licensed under the terms of the [MIT license](https://opensource.org/licenses/MIT).

bindings/python/README.md

@@ -44,6 +44,10 @@ into:
 - Works on Linux, Windows, and macOS
 - Supports HTML5 & CSS3
 
+## Playground
+
+If you'd like to try `css-inline`, you can check the WebAssembly-powered [playground](https://css-inline.org/) to see the results instantly.
+
 ## Installation
 
 Install with `pip`:

bindings/ruby/README.md

@@ -41,6 +41,10 @@ into:
 - Works on Linux, Windows, and macOS
 - Supports HTML5 & CSS3
 
+## Playground
+
+If you'd like to try `css-inline`, you can check the WebAssembly-powered [playground](https://css-inline.org/) to see the results instantly.
+
 ## Installation
 
 Add this line to your application's `Gemfile`: