ES6 Primer
ECMAScript 2015, commonly known as ES6, introduced a host of new features and syntactic sugar to JavaScript, making the language more powerful and easier to work with. React development heavily leverages these ES6+ features. This page provides a quick overview of some key ES6 concepts you'll frequently encounter.
Test Your ES6 Knowledge
What is the purpose of the 'let' keyword in ES6?
Which of the following is NOT a feature introduced in ES6?
What is the output of the following code? `const arr = [1, 2, 3]; const [a, ...rest] = arr; console.log(rest);`
What is the purpose of the 'const' keyword in ES6?
Which of the following is the correct syntax for an arrow function?