Get started with
PureScript

First you will need to install PureScript and pulp if you haven’t already. Check out this guide if you’re unsure how to proceed.

Creating a new OutWatch project from scratch

Create a new PureScript project with Pulp by running pulp init. Then run the following commands to install OutWatch.

$ bower install purescript-outwatch
$ npm install rxjs snabbdom

Great, we’ve created our first OutWatch Project!

Now we’ll create a small Hello World app to get you started. Inside our Main.purs file, we’ll want to import the framework by specifying import OutWatch at the top of our file. Now we’re ready to create our main entry point:

module Main where

import OutWatch

main = ...

Inside our main function we will want to write the following line:

render "#app" (h1 [text "Hello World"])

This will render an h1 element into the element with the id app. If you want to, you can also use qualified imports of the different parts of the library.

module Main where

import OutWatch.Tags (h1) as H
import OutWatch.Attributes (text)
import OutWatch.Core (render) as OutWatch

main =
  OutWatch.render "#app" (H.h1 [text "Hello World"])

Next we’ll need to create an index.html file at your project’s root. Inside we’ll want to add a reference to our js file and also add a node in which we want to display our app:

<body>
  <div id="app"></div>
  <script type="text/javascript" src="index.js"></script>
</body>

We’re basically done here. We created our first app. Now we only need to run it.

To run this, simply use the pulp browserify command to compile your code to JavaScript.

$ pulp browserify --to index.js

And with that, we’re done, check your browser, to see what we just created (it’s not that special, but it’s something).

Recompiling your files as needed

Retyping pulp browserify every time we want to compile can get quite annoying and inefficient. Luckily, with pulp, we can run every command in watch mode by simply adding the --watch flag in front of it.

$ pulp --watch browserify --to index.js
Build successful.
Browserifying...
Browserified.
Source tree changed; restarting:

And voila, you’ve created your first working developer environment.