One language to rule them all. There is no way to handle complex UIs in the browser without JavaScript. So while you absolutely need JS developers, why not make the API/backned in the same language so that you can hire additional developers that know the same language your existing employees already do. From an employer's perspective, it's easier to manage and (re-)allocate resources if need be.
JavaScript is becoming the web darling (or it already is?), whether we like it or not. And with some nice syntactic improvements ES6 brings, I don't mind.
JavaScript is becoming the web darling (or it already is?), whether we like it or not. And with some nice syntactic improvements ES6 brings, I don't mind.