ES6: Create an Export Fallback with export default

ES6: Create an Export Fallback with export default

In the exportlesson, you learned about the syntax referred to as a named export. This allowed you to make multiple functions and variables available for use in other files.

There is another exportsyntax you need to know, known as export default. Usually you will use this syntax if only one value is being exported from a file. It is also used to create a fallback value for a file or module.

Here is a quick example of export default:

export default function add(x,y) {
  return x + y;
}

Note: Since export defaultis used to declare a fallback value for a module or file, you can only have one value be a default export in each module or file. Additionally, you cannot use export defaultwith var, let, or const