In node.js given a filename how do you get its format and media type?

I want the output to be like image/png. type then followed by the extension. The filename doesn't include any information.

I tried basics such as mediainfo and ffprobe but one showed missing libraries error and the other doesn't work with images. I also

You can use the fs module (built-in) and file-type package (install with npm):

npm install file-type

with code like:

const fs = require('fs');
const fileType = require('file-type');
    
const getFileType = async(filePath) {
    const fileBuffer = fs.readFileSync(filePath);
    const type = await fileType.fromBuffer(fileBuffer);
    
    if (type) {
       console.log(`${type.mime} (${type.ext})`);
       return `${type.mime}`
    } else {
       console.log('Unable to determine the file type.');
       return 'unknown';
    }

}

const filename = 'path/to/your/file';
getFileType(filename)
.then((result) => console.log('MIME type:', result))
.catch((err) => console.error('Error:', err));