Learn how to increase timeout value for tests and testcases in Jest
Learn how to set prettier to ignore certain files
Learn how to set up Eslint + Prettier for linting and formatting
Learn how to determine if a value is an array
Learn how to use multi-line strings in JavaScript
Learn about the return keyword in JavaScript
JavaScript Concepts to grasp before learning Reactjs
Iterating through properties of an object
Learn about ES6 Modules introduced in ES6(ES2015)
Understanding the DOM API