> It wasn't until 2009 with the introduction of Node.js that JavaScript became a viable option for backend development. JavaScript was used for backend develop

> It wasn't until 2009 with the introduction of Node.js that JavaScript became a viable option for backend development. JavaScript was used for backend development since the late 1990s via the Rhino engine (the backends wouldn't be pure JS generally but a mix of JS and Java; Rhino was a JS engine for the JVM with Java interop as a key feature.)