Udemy – JavaScript Essentials for React Native Developers

Build a strong JavaScript foundation for React Native development by mastering six essential ES6+ concepts used in modern mobile applications. This beginner-friendly course contains approximately 3 hours of focused video lessons, practical examples, React Native use cases, common mistakes, and technical interview insights. You will learn how JavaScript handles variables, functions, objects, arrays, state updates, conditional rendering, and uncertain API data—giving you the confidence to read, write, and debug modern React Native code.

In this course, you will learn:

• The differences between var, let, and const
• Hoisting, execution phases, block scope, function scope, and the Temporal Dead Zone
• How primitives, objects, and references are stored in memory
• Arrow functions, implicit returns, lexical this, and common syntax mistakes
• Template literals and dynamic strings in JavaScript and JSX
• Object and array destructuring for props, state, defaults, renaming, and nested data
• The difference between spread and rest operators
• Immutable array and object updates in React Native state
• Shallow copying, reference equality, and React re-rendering
• Truthy and falsy values in JavaScript
• Short-circuit evaluation using && and ||