# Handlers.js > Handlers.js is a unified and lightweight web application framework for multiple platforms. ```ts import handlerJS from "./"; const App = new handlerJS(); App.binding( "/", App.create("ANY", async () => "Hello World!") ); App.useMappingAdapter(); App.listen(8080); ``` ## Installation ```bash # Use Yarn yarn add sw2express # Use NPM npm install sw2express ```