When working with JavaScript, we find the term ECMAScript very often in books, blog posts, video courses, and so on. What does ECMAScript have to do with JavaScript, and is there a difference?
ECMA is an organization that standardizes information. Long story short, a long time ago, JavaScript was submitted to ECMA for standardization. This resulted in a new language standard, which we know as ECMAScript. JavaScript is an implementation of this specification (the most popular), which is known as ActionScript.
As we already know, JavaScript is a language that runs mostly on browsers (as well as in servers using NodeJS, and in desktop and mobile devices), and each browser can implement its own version of the available functionalities of JavaScript (as you will learn later on in this book). This specific implementation is based on ECMAScript. Thus, the browsers offer mostly the same functionalities (our JavaScript code...