Sébastien Doeraene @sjrdoeraene June 10, 2015 -- Scala Days Amsterdam LAMP, lamp.epfl.ch École polytechnique fédérale de Lausanne Compiling to JavaScript Hundreds of languages compile to JavaScript Languages that don't compile to JS are weird Compiling to JavaScript: Problem solved! What are the hard parts, then? The hard parts Interoperability with JavaScript code Performance Rely on Semantics WA