Originally forked from jekyll-lunr-js-search and refactored for advanced or query search with customization for collections. This will also work with posts because they are classified as the collection 'posts'.
Quickstart instructions are located here: https://dnoneill.github.io/jekyll-lunr-js-custom-search/quickstart
Install Bundler and then run the following.
bundle install
Install Bower.
To build the plugin.
rake build
Then copy build/jekyll_lunr_js_search.rb to your Jekyll site's _plugins folder and the build/*.min.js files to your site's js folder.
If you include the .js and .js.map files your browser developer console will link to the unminified code.