Lecture 1 of 'Advanced Programming with JavaScript' -- Basic Concepts

I have read the book "JavaScript Advanced Programming" several times before, but I have never read it completely. From now on, I will read it completely and record notes and my own thoughts on each chapter. Come on!

Since the content of the first three chapters is relatively simple, I will put them into one chapter to record the learning process.

1. Basic concepts

1. The relationship between JavaScript and ECMAScript

It can be understood that in addition to ECMAScript, JavaScript contains Also includes DOM (Document Object Model), BOM (Browser Object Model)

2,