People have found success in managing large Javascript codebases through good design choices like module systems (AMD/CommonJS), using the SRP to keep modules t

People have found success in managing large Javascript codebases through good design choices like module systems (AMD/CommonJS), using the SRP to keep modules tight, and testing. It's tough (nigh impossible?) to retrofit those design choices onto an existing codebase. Dart and TypeScript seem to offer a more familiar path to people who are used to Java/.NET/etc and who have been burned by messy JS codebases.