erv-ticket-dev/libs/heic2any/heic2any-master/docs/getting-started.md

Getting started

Installation

• yarn

yarn add heic2any

• npm

npm install heic2any

• no module bundler

<!-- just include the file in a script tag -->
<script src="./dist/heic2any.js">

Using the library

1. Importing the library: if you're using a module bundler (not including the file directly) then you can import the library like the example below.

import heic2any from "heic2any";
// or
const heic2any = require("heic2any");
// skip the lines above if you're not using a module bundler

2. Basic usage: The following example will convert heic file to png. plain and simple.

// fetching the heic image
fetch("./my-image.heic")
	.then((res) => res.blob())
	.then((blob) => heic2any({ blob }))
	.then((conversionResult) => {
		// conversionResult is a BLOB
		// of the PNG formatted image
	})
	.catch((e) => {
		// see error handling section
	});

JSFiddle Demo

3. Compressing and lowering the quality: The following example will convert heic file to jpeg, with low quality.

// fetching the heic image
fetch("./my-image.heic")
	.then((res) => res.blob())
	.then((blob) =>
		heic2any({
			blob,
			toType: "image/jpeg",
			quality: 0.5, // cuts the quality and size by half
		})
	)
	.then((conversionResult) => {
		// conversionResult is a BLOB
		// of the JPEG formatted image
		// with low quality
	})
	.catch((e) => {
		// see error handling section
	});

JSFiddle Demo

4. Supporting multiple images: As some heic files are actually multiple images, you might want to extract them into multiple png files like the example below.

// fetching the heic image
fetch("./my-image.heic")
	.then((res) => res.blob())
	.then((blob) =>
		heic2any({
			blob,
			toType: "image/png",
			multiple: true,
		})
	)
	.then((conversionResult) => {
		// conversionResult is an array
		// of BLOBs that are PNG
		// formatted images
	})
	.catch((e) => {
		// see error handling section
	});

JSFiddle Demo

5. Supporting animated images: Multiple heic images means that it is an animated image (like bursts), so you might want to convert it to a gif image.

// fetching the heic image
fetch("./my-image.heic")
	.then((res) => res.blob())
	.then((blob) =>
		heic2any({
			blob,
			toType: "image/gif",
			gifInterval: 0.3, // switch frames every 0.3 second
		})
	)
	.then((conversionResult) => {
		// conversionResult is a BLOB
		// of the gif formatted image
	})
	.catch((e) => {
		// see error handling section
	});

JSFiddle Demo