JavaScript is a very flexible programming language, and you can implement your requirements in many different ways. But following a few principles and tips can make your code more readable and efficient.

1. Write code in the style of a strongly typed language

JavaScript is a weakly typed programming language in which a variable can have different types of values syntactically. But to improve compilation performance and make your code easier for other programmers to read, it is recommended that you write your code in a strongly typed style.

You should specify the data type when you define a variable

Bad code:

The variables in the above code lack type information, making it difficult for other programmers to understand the code or for the JavaScript interpreter to optimize.

Good code：

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