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add some documentation for managing assets using webpack

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nobohan 2018-04-18 12:34:59 +02:00
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.. Copyright (C) 2014 Champs Libres Cooperative SCRLFS
Permission is granted to copy, distribute and/or modify this document
under the terms of the GNU Free Documentation License, Version 1.3
or any later version published by the Free Software Foundation;
with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts.
A copy of the license is included in the section entitled "GNU
Free Documentation License".
.. _forms:
Assets
#######
The Chill assets (js, css, images, …) can be managed by `Webpack Encore`_, which is a thin wrapper for `Webpack`_ in Symfony applications.
Installation
************
Webpack Encore needs to be run in a Node.js environment, using the Yarn package manager. This Node.js environment can be set up using a node docker image. The bash script `docker-node.sh` set up a Node.js environment with an adequate configuration. Launch this container by typing:
.. code-block:: bash
$ bash docker-node.sh
In this NodeJS environment, install all the assets required by Chill with:
.. code-block:: bash
node@b91cab4f7cfc:/app$ yarn install
This command will install all the packages that are listed in `package.json`.
Any further required dependencies can be installed using the Yarn package. For instance, jQuery is installed by:
.. code-block:: bash
node@b91cab4f7cfc:/app$ yarn add jquery --dev
Usage
*****
Organize your assets
--------------------
Chill assets usually lives under the `/Resources/public` folder of each Chill bundle. The Webpack configuration set up in `webpack.config.js` automatically loads the required assets from the Chill bundles that are used.
For adding your own assets to Webpack, you must add an entry in the `webpack.config.js` file. For instance, the following entry will output a file `main.js` collecting the js code (and possibly css, image, etc.) from `./assets/main.js`.
.. code-block:: js
.addEntry('main', './assets/main.js')
To gather the css files, simply connect them to your js file, using `require`. The css file is seen as a dependency of your js file. :
.. code-block:: js
// assets/js/main.js
require('../css/app.css');
For finer configuration of webpack encore, we refer to the above-linked documentation.
Compile the assets
------------------
To compile the assets, run this line in the NodeJS container:
.. code-block:: bash
node@b91cab4f7cfc:/app$ yarn run encore dev
While developing, you can tell Webpack Encore to continuously watch the files you are modifying:
.. code-block:: bash
node@b91cab4f7cfc:/app$ yarn run encore dev --watch
Use the assets in the templates
--------------------------------
Any entry defined in the webpack.config.js file can be linked to your application using the symfony `asset` helper:
.. code-block:: html
<head>
...
<link rel="stylesheet" href="{{ asset('build/app.css') }}">
</head>
<body>
...
<script src="{{ asset('build/app.js') }}"></script>
</body>
.. _Webpack Encore: https://www.npmjs.com/package/@symfony/webpack-encore
.. _Webpack: https://webpack.js.org/

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@ -31,6 +31,7 @@ As Chill rely on the `symfony <http://symfony.com>`_ framework, reading the fram
Testing <make-test-working.rst> Testing <make-test-working.rst>
Useful snippets <useful-snippets.rst> Useful snippets <useful-snippets.rst>
manual/index.rst manual/index.rst
Assets <assets.rst>
Layout and UI Layout and UI
************** **************