js-image-lib

👋 Intro

An image manipulation library using only pure JavaScript

This library lets you:

• Resize images to different sizes
• Convert between the following file types: png, jpeg, gif, bmp, and tiff
• Apply operations like resize, crop, rotate, blur, and flip

This library uses pure browser-compatible JavaScript, relying on no Node packages. This means js-image-lib can be run anywhere you use JavaScript!

Note: The use of pure JavaScript means this library will run much slower than alternative libraries that have C/etc bindings. You should primarily use js-image-lib in environments where speed is not the first concern, especially in cases where you are trying to support all platforms!

🚀 How to use

Install

To install this library, use on of the following commands:

npm install -S js-image-lib
yarn add js-image-lib

Use

Retrieve your image as a Uint8Array, then transform it with imageTransformer by providing the image and the options to use.

import ImageTransformer from "js-image-lib";

// Get your image to transform on Node
const inputJpeg = new Uint8Array(fs.readFileSync("./my-image.jpeg"));

// Or get your image to transform in the browser using fetch
const imageResponse = await fetch(url, {
  headers: {
    accept: "image/*",
  },
});
const arrBuff = await imageResponse.arrayBuffer();
const inputJpeg = new Uint8Array(arrBuff);

// Create ImageTransformer with your image
const transformer = new ImageTransformer(inputJpeg);

transformer.blur(...);
transformer.crop(...);
transformer.flip(...);
transformer.resize(...);
transformer.rotate(...);

// Operations can be done in sequence
transformer.blur(5).rotate(45).flip("both");

// Finally, export your image
const exported = transformer.toBuffer("image/jpeg");

Docs

• Documentation for this library can be found at: https://js-image-lib.mcfarl.in
• Several examples can be found in examples/