is-file-animated

is-file-animated is a simple library for detecting animated GIF/PNG/WebP images from Blob/File or fs.FileHandle.

Install

npm install is-file-animated

Example

On browsers and similar environments:

1import isAnimated from 'https://cdn.jsdelivr.net/npm/is-file-animated/+esm'
2
3const response = await fetch(url)
4
5const blob = await response.blob()
6const answer = await isAnimated(blob) ? 'Yes' : 'No'
7console.log(`Is "${url}" animated? ${answer}.`)

On Node.js:

1import { open } from 'fs/promises'
2import isAnimated from 'is-file-animated'
3
4const filename = process.argv[2]
5
6const handle = await open(filename)
7const answer = await isAnimated(handle) ? 'Yes' : 'No'
8console.log(`Is "${filename}" animated? ${answer}.`)

License

MIT