How to make your JavaScript library

Create your own Javascript library in 5 easy steps with code examples. Learn how to make your code reusable & efficient.

Creating a JavaScript Library

Creating a JavaScript library can be a rewarding and fun experience. It allows you to create a reusable set of code that can be used in multiple projects and shared with other developers. Here is an example of creating a basic JavaScript library.

Step 1: Setup the project

The first step is to setup the project. We need to create a directory for the project and add a few files. Create a directory called "mylibrary" and add an index.html and a src folder. Inside the src folder create a file called "mylibrary.js".

mkdir mylibrary
cd mylibrary
touch index.html
mkdir src
touch src/mylibrary.js

Step 2: Add the library code

Next, we need to add the source code to the mylibrary.js file. This is the code that will be used in your library. For our example, we will create a simple function that returns the current date.


function getDate() {
  var today = new Date();
  var dd = today.getDate();
  var mm = today.getMonth()+1; //January is 0!
  var yyyy = today.getFullYear();

  if(dd<10) {
      dd = '0'+dd
  } 

  if(mm<10) {
      mm = '0'+mm
  } 

  today = yyyy + '-' + mm + '-' + dd;
  return today;
}

Step 3: Adding the library to the HTML page

Now we need to add the library to our HTML page. We can do this by using the

Step 4: Using the library

Once the library is added to the HTML page, we can use the getDate() function in our code. For example, we can add an element to the page that displays the current date.


Today's date is

That's it! We've successfully created a basic JavaScript library. With a few more lines of code, you can create a more complex library that can be used in multiple projects.

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