This example project is to explain how to use a configuration file with the Lasso.js command line interface.
Lasso.js is an eBay open source Node.js-style JavaScript module bundler and asset pipeline that also provides first-level support for optimally delivering JavaScript, CSS, images and other assets to the browser.
This tool offers many different optimizations such as a bundling, code splitting, lazy loading, conditional dependencies, compression, JS/CSS/IMG minification, Base64 image encoding, and fingerprinted resource URLs. Plugins are provided to support pre-processors and compilers such as Less, Stylus and Marko.
git clone https://github.com/lasso-js-samples/lasso-config.git cd lasso-config npm install
This sample app uses a local installation of the lasso-cli module, but you can also install it globally using the following command:
npm install lasso-cli --global
Open http://localhost:8080 in your web browser to test out your page.
lasso-config.json:
{
"plugins": [
"lasso-less" /* Unable preprocessing for Less files
],
"outputDir": "build/static/", /* Output directory for all generated assets */
"urlPrefix": "/static", /* Prefix added to all generated URLs */
"fingerprintsEnabled": true, /* Add a "fingerprint" to the generated resource URL (changes when file changes)
"minify": true, /* Minify JavaScript and CSS */
"resolveCssUrls": true, /* Resolve resource URLs found in CSS fils */
"bundlingEnabled": true, /* Concatenate resources together */
"bundles": [ /* Preconfigured bundles */
{
"name": "jquery",
"dependencies": [
"require: jquery"
]
},
{
"name": "math",
"dependencies": [
"require: ./src/add"
]
}
]
}
The configuration file to run lasso is ./lasso-config.json. Running the above command will result in JavaScript and CSS bundles being written out to the ./static directory.
The JavaScript and CSS dependencies for src/index.html are declared in src/browser.json.
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