file-size-pretty/index.js

Convert file sizes like 34892823 into human-readable formats like 33.2 MB.

// index.js
function fileSizePretty(bytes, decimals = 1, options = {}) {
    if (bytes === 0) return '0 B';

    const { standard = 'binary' } = options;
    const k = standard === 'si' ? 1000 : 1024;
    const sizes = standard === 'si'
        ? ['B', 'kB', 'MB', 'GB', 'TB', 'PB']
        : ['B', 'KB', 'MB', 'GB', 'TB', 'PB'];
    const i = Math.floor(Math.log(bytes) / Math.log(k));
    const size = parseFloat((bytes / Math.pow(k, i)).toFixed(decimals));
    return `${size} ${sizes[i]}`;
}

module.exports = fileSizePretty;