JavaScript Trailing Commas

Modern JavaScript

About Lesson

It is JavaScript lesson we are going to learn about JavaScript Trailing Commas, so trailing commas comes at the end of the last item in a list, and it is a feature in JavaScript ES8.

Now let’s create an example, so you can see that after our last item in the array, we have added a comma, and there is no problem with this syntax, and we will not receive any error, because it is a feature in JavaScript ES8.

const number = [1,2,3,4,5,6,];
console.log(number);

1 2	const number = [1,2,3,4,5,6,]; console.log(number);

Also you can add training commas in a function, you can see in the function after adding the second parameter we have added a comma and this is a valid syntax.

function add(a,b,) {
  return a+b;
}

console.log(add(4,5));

function add(a,b,) {

return a+b;

}

console.log(add(4,5));