See also http://facebook.github.io/react/docs/getting-started.html, linked from the previous page, and the subsequent example JSFiddle(s). JSX does and is recommended to be compiled down to JS, or you can directly use the JS syntax it will otherwise compile. Otherwise, if you only want the compile step to be apart of your production toolchain, you can include the JSXTransformer in development environments, which will perform the transformation in the browser -- not just Chrome.