JavaScript - ES2016 (aka ES7)
The ES2016 ES2016, officially known as ECMAScript 2016, was finalized in June 2016. ES2016 is a tiny release for JavaScript, containing just two features: Array.prototype.includes Exponentiation Operator Array.prototype.includes() This feature introduces a more readable syntax for checking if an array contains an element. With ES6 and lower, to check if an array contained an element you had to use indexOf , which checks the index in the array, and returns -1 if the element is not there. Since -1 is evaluated as a true value, you could not do for example if ( ! [ 1 , 2 ] . indexOf ( 3 ) ) { console . log ( 'Not found' ) } With this feature introduced in ES2016 we can do if ( ! [ 1 , 2 ] . includes ( 3 ) ) { console . log ( 'Not found' ) } Exponentiation Operator The exponentiation operator ** is the equivalent of Math.pow() , but brought into the language instead of being a library ...