What are default parameters in JavaScript ES6?

What are default parameters in JavaScript ES6?

Default parameters allow named parameters to be initialized with default values if no value or undefined is passed.

Can you give me an example of how to use default parameters?

Sure! Here's an example:

function multiply(a, b = 1) {
    return a * b;
}
console.log(multiply(5)); // Outputs: 5
console.log(multiply(5, 2)); // Outputs: 10

What happens if I pass undefined as an argument?

If you pass undefined, the default value will be used. For example, multiply(5, undefined) will return 5.

Are there any limitations to using default parameters?

Yes, default parameters cannot be used in function expressions before they are defined, and they can lead to unexpected behavior if not used carefully.