Node.js ImageMin Library for Compressing PNG and JPG Images

To compress PNG and JPG images in Node.js, you can use the imagemin library along with its plugins specifically designed for PNG (imagemin-pngquant) and JPG (imagemin-mozjpeg) compression. Here’s an example of how to use imagemin in a Node.js script:

Step 1: Set up a new Node.js project

Create a new directory for your project and navigate into it. Open a terminal in the project directory.

Initialize a new Node.js project by running the following command:

npm init -y

Step 2: Install the required packages

Install the imagemin, imagemin-pngquant, and imagemin-mozjpeg packages by running the following command:

npm install imagemin imagemin-pngquant imagemin-mozjpeg

Step 3: Create a compression script

Create a new JavaScript file (e.g., compress-images.js) in the project directory and add the following code:

const imagemin = require('imagemin');

const imageminPngquant = require('imagemin-pngquant');

const imageminMozjpeg = require('imagemin-mozjpeg');

async function compressImages() {

try {

const files = await imagemin(['images/*.{jpg,png}'], {

destination: 'compressed-images',

plugins: [

imageminMozjpeg({ quality: 80 }),

imageminPngquant({ quality: [0.6, 0.8] })

]

});

console.log('Images compressed successfully:');

console.log(files.map(file => file.destinationPath));

} catch (error) {

console.error('Error compressing images:', error);

}

compressImages();

In the code above, we import the required packages: imagemin, imagemin-pngquant, and imagemin-mozjpeg.

The compressImages function is an asynchronous function that performs the image compression. It uses the imagemin function to compress the images in the images directory and saves the compressed images in the compressed-images directory.

The plugins option is used to specify the plugins to be used for PNG and JPG compression. imageminMozjpeg is used for JPG compression with a quality setting of 80, and imageminPngquant is used for PNG compression with a quality range of 0.6 to 0.8.

The script then logs the paths of the compressed images to the console.

Step 4: Add images to compress

Create a new directory named images in the project directory and add the PNG and JPG images that you want to compress.

Step 5: Run the compression script

Save the file and run the compression script by executing the following command in the terminal: