After much research, figured out what was going wrong with the flexbox stuff in Safari and IE11; they don't know how to calculate the height of the right box when the contents are flex items, so I've added a shim to the code to detect this and set the height to 100% when it's tiny. That means we have broad compatibility across current browsers. I've also added minification into the build process, reverted my documentation builds to using jsdoc 2.4, which actually works, and updated a lot of the documentation after looking through the results.