JavaScript can be a boon if used with care—or a bane if used recklessly. Here are the 10 JavaScript concepts you’ll need to write scalable code in Node.js.

‘Higher-order functions’ is a fancy term for functions that take other functions as arguments or that return functions. Very powerful!

A lightning-fast crash course on JavaScript, the world’s most popular programming language. From its 1995 origins as Mocha in ...