What are some benefits of transpiling to JavaScript?

[sebdeckers]

JavaScript is a valuable target for transpilation because it runs in all web browsers. Some benefits of using other languages:

• Supporting ES6 (and beyond) in a browsers that only support ES5. See: BabelJS
• Using languages for web development that are easier to use than JavaScript or otherwise desirable. For example: CoffeeScript, TypeScript, Dart.
• Re-using large amounts of legacy code with minimal effort. Analogy: This is like building an automated translator from chinese to english as opposed manually translating every chinese text to english. Example: Unreal Engine