Hacks influence negatively the way JavaScript programs are coded. Find out how to remove old hacks and make your code shining again using ES2015 features.

Well-known symbols allow to customize many JavaScript algorithms: elements iteration, instanceof, regexp string methods, derived object and more.

Hoisting moves variables and functions to the beginning of the scope. But this term is no longer valid for `let`, `const` and `class`: and here's why.

ES2015 improves the object literals (or initialiazers) to set the prototype using __proto__, use super, shorthand method declarations, computed names.

ES2016 is a small but important release. Examine the must know details about the new array method includes() and the exponentiation operator.

The history how JavaScript from a complementary language in 1995 became the most popular language these days.

ES6 improves the way arrays are created in JavaScript. See how the combination of array literal, spread operator and iterators upgrade array initialization.

JavaScript allows to declare functions in 6 ways. The article describes how to choose the right declaration type, depending on the function purpose.

Spread operator and rest parameter are great additions. The article explains how they improve array literals, array destructuring and function arguments handling.

Arrow functions in JavaScript are great, but there are cases when you should avoid them. See the common pitfalls with explanations and examples.