Book Image

Learn ECMAScript - Second Edition

By : MEHUL MOHAN, Narayan Prusty
Book Image

Learn ECMAScript - Second Edition

By: MEHUL MOHAN, Narayan Prusty

Overview of this book

Learn ECMAScript explores implementation of the latest ECMAScript features to add to your developer toolbox, helping you to progress to an advanced level. Learn to add 1 to a variable andsafely access shared memory data within multiple threads to avoid race conditions. You’ll start the book by building on your existing knowledge of JavaScript, covering performing arithmetic operations, using arrow functions and dealing with closures. Next, you will grasp the most commonly used ECMAScript skills such as reflection, proxies, and classes. Furthermore, you’ll learn modularizing the JS code base, implementing JS on the web and how the modern HTML5 + JS APIs provide power to developers on the web. Finally, you will learn the deeper parts of the language, which include making JavaScript multithreaded with dedicated and shared web workers, memory management, shared memory, and atomics. It doesn’t end here; this book is 100% compatible with ES.Next. By the end of this book, you'll have fully mastered all the features of ECMAScript!
Table of Contents (18 chapters)
Title Page

Doing math

ES6 and above add a lot of new methods to the Math object, related to trigonometry, arithmetic, and miscellaneous. This lets developers use native methods instead of external math libraries. Native methods are optimized for performance and have better decimal precision.

Trigonometry-related operations

Often there is a need to use mathematical functions related to trigonometry, exponential, logarithmic, and so on. JavaScript provides native methods for that to make our work easy.

The following example code, which shows all trigonometry-related methods that are added to the Math object:

console.log(Math.sinh(0)); //hyberbolic sine of a value
console.log(Math.cosh(0)); //hyberbolic cosine of a value
console.log(Math.tanh(0)); //hyberbolic tangent of a value
console.log(Math.asinh(0)); //inverse hyperbolic sine of a value
console.log(Math.acosh(1)); //inverse hyperbolic cosine of a value
console.log(Math.atanh(0)); //inverse hyperbolic tangent of a value
console.log(Math.hypot(2, 2, 1...