nunjucks-loader
v3.0.0
Published
A nunjucks loader for webpack.
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Nunjucks loader for webpack
require
precompiled templates in webpack- supports
extends
andinclude
- resolves template dependencies using
require
- bundles the nunjucks-slim browser runtime
- use the version of nunjucks you want to as a peer dependency
- supports experimental Jinja compatibility
Usage
Recommended configuration
Install: npm install nunjucks-loader --save
Add to webpack.config to process all .njk and .nunjucks files:
// file: webpack.config.js
module.exports = {
entry: './src/entry.js',
output: {
path: __dirname,
filename: 'bundle.js'
},
module: {
loaders: [
{
test: /\.(njk|nunjucks)$/,
loader: 'nunjucks-loader'
}
]
}
};
Then use it in your module code without the nunjucks!
prefix:
// file: src/entry.js
var tpl = require('./views/page.njk');
var html = tpl.render({ message: 'Foo that!' });
Inline configuration (not recommended)
If using the inline configuration (below), references inside of templates to other files (parents, imports etc) may not resolve correctly - hence it's preferable to use the webpack.config method above.
var tpl = require("nunjucks!./views/page.njk");
var html = tpl.render({ message: 'Foo that!' });
webpack.target = 'node'
The 2.x versions of this loader do not support node/UMD bundles.
If you need to support node or UMD with the bundle, the 1.x version (npm install [email protected]
) supports these
targets.
Filters and extensions
A require filter is added by this package that allows you to use webpack to resolve file references. Eg.
{# use the raw-loader to replace 'readme.txt' with the contents of that file #}
{{ 'raw!readme.txt' | require }}
A custom nunjucks.Environment is used by the loader, to configure the nunjucks environment:
- To pass nunjucks.Environment options, add a
opts
key to the nunjucks loader query in webpack.config.js - Create a file that will configure the environment. This should export a function that receives the nunjucks environment as its first argument.
- Add a
config
key to the nunjucks-loader query in webpack.config.js - Add an optional
quiet
key to the loader query in webpack.config.js to suppress precompile warnings (see below)
// file: src/nunjucks.config.js
module.exports = function(env){
env.addFilter('asyncFoo', function(input, done){
setTimeout(function(){
done('[asyncFoo] ' + input);
}, 1000)
}, true);
// env.addExtension(...) etc
}
// file: webpack.config.js
module.exports = {
entry: './src/entry.js',
output: {
path: __dirname,
filename: 'bundle.js'
},
module: {
loaders: [
{
test: /\.(njk|nunjucks)$/,
loader: 'nunjucks-loader',
query: {
config: __dirname + '/src/nunjucks.config.js'
}
}
]
}
};
If using async filters or custom extensions with nunjucks, they must be available before the template is precompiled. If the nunjucks config file depends on webpack resolve (such as loaders or custom module paths), the custom filters/extensions will not be available at precompile time. When/if this happens, you will receive the following warning in the console:
Cannot configure nunjucks environment before precompile
When using webpack resolve with the environment config and not using async filters or custom extensions, the warning can be safely ignored - standard filters are still added to the environment at runtime.
To remove the warning, pass the quiet
option in the loader query. eg:
// file: webpack.config.js
module.exports = {
module: {
loaders: [
{
test: /\.(njk|nunjucks)$/,
loader: 'nunjucks-loader',
query: {
config: __dirname + '/src/nunjucks.config.js',
quiet: true // Don't show the 'Cannot configure nunjucks environment before precompile' warning
}
}
]
}
};
Path resolution
This loader modifies the way nunjucks resolves dependencies (eg extends
, import
and include
) to work correctly
with webpack. As a result, you may use require
style relative paths in your templates.
Add a resolve.root
key to webpack.config.js
to resolve your templates without using relative paths.
// file: webpack.config.js
module.exports = {
resolve: {
root: [
__dirname,
__dirname + '/src/views' // Resolve templates to ./src/views
]
}
}
Alternatively, a root
query parameter can be passed to the loader to set the root template directory.
// webpack.config.js
module.exports = {
module: {
loaders: [
{
test: /\.(nunj|nunjucks)$/,
loader: 'nunjucks-loader',
query: {
root: __dirname + '/path/to/templates'
}
}
]
}
}
Jinja/Python compatibility
If experimental support for Jinja compatibility is desired, pass the jinjaCompat option in the loader query. eg:
// file: webpack.config.js
module.exports = {
module: {
loaders: [
{
test: /\.(nunj|nunjucks)$/,
loader: 'nunjucks-loader',
query: {
jinjaCompat: true
}
}
]
}
};
This option will not provide full Jinja/Python compatibility, but will treat True
/False
like true
/false
, and
augment arrays and objects with Python-style methods (such as count
, find
, insert
, get
, and update
).
Review the jinja-compat source to see
everything it adds.
Tests
npm run test
Navigate to http://localhost:8080/test