It is inevitable that future JavaScript applications will grow to be more complex. Keeping the quality of such a complex system is far from trivial. Unfortunately, our JavaScript tools recently still move at a glacial speed. Many code analyzers scream at you when a semicolon is omitted, yet they are totally oblivious to a copy-paste mistake. This talk will discuss the development of emerging JavaScript language tooling designed to solve: * code inspection: autocomplete, code outline, API harness * static analysis: code metrics, API harness, cyclomatic complexity * dynamic analysis: code coverage, execution tracing, run-time scalibility * source transformation: coding style, language extension (module, class, macro, …)