Today, JavaScript plays a huge role in website development.
Front-end developers use JavaScript to create interactive web applications.
As a result, theres been an increase in demand for JavaScript developers.
Certainly, JavaScript has evolved over the years.
ES6 introduced many new features to the language.
One of these is a way to easily share codes among JavaScript files.
Function import and export for JavaScript are new features that will make you a better developer.
Here’s how these features work.
What Is a JavaScript Module?
A JavaScript module is a JavaScript file that contains a collection of code for you to use.
Modules are usually written in separate files and imported using theimportkeyword.
It saves time and effort because you could reuse it later.
One of the benefits of using modules is that it helps to keep your code organized.
It also makes your code more manageable and easier to debug.
There are two types of modules:
We’ll focus on the ECMAScript Modules here.
If needed, see ourintroduction to JavaScriptto brush up on the basics.
Exporting functions is a good way to transfer them into other programs.
It’s also used when you want to create reusable libraries.
Exporting functions in JavaScript is done using theexportfunction.
Theexportfunction exports a given function to be used by another file or script.
There are two ways to use theexportfunction efficiently.
We’ll go over these with code examples.
This is done by including the names of the desired functions in the curly bracket.
The functions are separated by comma.
Any function can be imported using a full-path reference.
Importing functions is quite straightforward.
JavaScript has a built-in feature to import your own functions from other files.
A function to be imported is already exported in its original file.
so that import multiple functions, the functions to be imported are included in the curly braces.
Each is separated by a comma (,).
There is another way to use theimportfunctionality.
This allows us to import all the exports in a particular file.
It is done using theimport * assyntax.
This is just a variable name, you could name it anything.
Export defaultis an exceptional export functionality.
This is used if only one variable is being exported from a file.
It is also used to create a fallback value for a file or module.
A Function used as default is imported differently.
Theyre usually written in separate files, and imported using the import keyword.
One of the benefits of using modules is that it helps to keep your code organized.
It also makes your code more manageable and easier to debug.
