Getting Started with WebSharper

This article will walk you through getting a "hello world" WebSharper example up and running.

After completing the installation, open Visual Studio and create a new project ("Website"):

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File > New Project > Templates > Visual F# >
WebSharper > Client-Server Web Application

New Project Screenshot

This project defines a simple website, with both server and client-side components. To try it out, simply "Run" (F5) - you should now see the code in action:

Sample App Screenshot

Let us look at what the code does.

Client Module

This is the most interesting module (see Client.fs ). Having it marked [<JavaScript>] makes WebSharper cross-compile all code in this module to JavaScript and run it in the browser.

The Main method is what is invoked as the client-side point. It generates some DOM elements dynamically and these get inserted in the page.

The Start method is used in the handler for a button click. It sends some client-side data to the server for processing and returns it back asynchronously.

Remoting Module

This module ( Remoting.fs ) defines the Process function that is executed on the server but is also available on the client. Execution happens by serializing arguments and return value and passing them over HTTP. Not all types are supported, WebSharper will warn you about potential problems at compile time.

Main Module

The main module ( Main.fs ) defines the page structure of your website, the main HTML template to use, server-side markup to generate, and finally marks these definitions as default by using an assembly attribute.

As you are starting out, you may just consider this boilerplate and focus on programming the client-side logic. For diving deeper, reference documentation is available by topic in the manual.

Main Template

The Main.html file provides the overall template that is by default applied to every page of your website. You can edit the HTML to adjust the overall layout and look-and-feel.