Javascript lexer tokenizer in Python

Creating a JavaScript lexer/tokenizer in Python can be a valuable exercise for understanding the fundamentals of language processing. In this tutorial, we'll use Python to build a simple JavaScript lexer that can tokenize basic constructs like keywords, identifiers, operators, and literals.
Step 1: Set Up Your Project
Step 2: Define Tokens
Identify the basic JavaScript tokens you want to handle. Common tokens include keywords, identifiers, operators, and literals (strings, numbers).
Step 3: Implement the Lexer
Now, let's create a simple lexer that can tokenize a basic JavaScript script. We'll use regular expressions to match different token types.