how to document a function in javascript

A good practice in JavaScript coding is to document each function with proper comments. This helps other developers (and even your future self!) understand what the function does, what its arguments are, and what values it returns. One way to document a function in JavaScript is to use JSDoc comments.

Here's an example of how to use JSDoc to document a function:

index.tsx
/**
 * Calculates the sum of two numbers.
 * @param {number} num1 - The first number to be added.
 * @param {number} num2 - The second number to be added.
 * @returns {number} The sum of num1 and num2.
 */
function addNumbers(num1, num2) {
  return num1 + num2;
}
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In the above example, we're using JSDoc comments to document the addNumbers function.

The comments begin with /** and end with */. Here's what each part of the comment does:

• @param {number} num1: This describes the num1 parameter of the function. The {number} part indicates that the parameter should be a number.
• @param {number} num2: This describes the num2 parameter of the function.
• @returns {number}: This describes the return value of the function. The {number} part indicates that the function returns a number.

By using JSDoc or similar comments, you can create a clear, informative documentation for your JavaScript functions that other developers can easily understand and use.