How to Architect and Automate Bootstrap Development with Grunt

Bootstrap is the most popular frontend framework, offering many components. While each feature may be simple for experienced developers, the overall system is complex, requiring careful architecture and process control.

Requirements

Development : Primarily CSS and JavaScript. JavaScript is a mature language; CSS development uses a pre‑processor, and Bootstrap chooses Less.

Testing : Comprehensive testing is essential, including code linting, unit tests, and cross‑browser verification.

Compilation : Less files must be compiled to regular CSS, and both CSS and JS files need concatenation and minification.

Release : Documentation must be generated and all assets packaged into a zip file for distribution.

Implementation

Bootstrap uses Grunt as its build tool to automate everything beyond code writing.

When JavaScript or Less files change, Grunt automatically runs compilation and testing tasks. The main Grunt plugins and tasks include:

less : compiles Less to CSS.

autoprefixer : adds vendor prefixes to CSS properties, e.g.:

a{
  transition: transform 1s;
}

a{
  -webkit-transition: -webkit-transform 1s;
  -ms-transition: -ms-transform 1s;
  transition: transform 1s;
}

jshint : JavaScript syntax checking.

jscs : JavaScript code style checking.

concat : concatenates files.

uglify : minifies JavaScript.

qunit : runs tests in Phantom.js (a headless WebKit browser).

saucelabs-qunit : cross‑browser testing via Sauce Labs.

jade : Node‑based template engine for generating pages.

htmllint : HTML linting.

jekyll : generates static documentation.

watch : monitors file changes and triggers compilation, linting, and testing.

compress : packages the final build into a downloadable zip.