jQuery 1.7.2, HTML, CSS, JavaScript
most simple code ever :) Barebones POC of a collapsible / expandable nested ul structure. Each "level" expands/contracts each descendant ul recursively using slideToggle(). Happy coding ;)
jQuery 1.8.3, HTML, CSS, JavaScript
jQuery 2.0.2, HTML, CSS, JavaScript
No-Library (pure JS), HTML, CSS, JavaScript
jQuery 1.9.1, HTML, CSS, JavaScript
Mootools 1.4.2, HTML, CSS, JavaScript
Mootools 1.4.5, HTML, CSS, JavaScript
jQuery 1.10.1, HTML, CSS, JavaScript
jQuery Compat (edge), HTML, CSS, JavaScript