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JavaScript To Convert Bytes To MB, KB, Etc
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export function bytesToSize(bytes: number): string { | |
const sizes = ['Bytes', 'KB', 'MB', 'GB', 'TB']; | |
if (bytes === 0) return 'n/a'; | |
const i = Math.min(Math.floor(Math.log(bytes) / Math.log(1024)), sizes.length - 1); | |
if (i === 0) return `${bytes} ${sizes[i]}`; | |
return `${(bytes / (1024 ** i)).toFixed(1)} ${sizes[i]}`; | |
} | |
// Jest spec | |
describe('bytesToSize', () => { | |
test.each([ | |
[0, 'n/a'], | |
[1, '1 Bytes'], | |
[2000, '2.0 KB'], | |
[30000, '29.3 KB'], | |
[400000, '390.6 KB'], | |
[5000000, '4.8 MB'], | |
[60000000, '57.2 MB'], | |
[700000000, '667.6 MB'], | |
[8000000000, '7.5 GB'], | |
[90000000000, '83.8 GB'], | |
[100000000000, '93.1 GB'], | |
[1100000000000, '1.0 TB'], | |
[12000000000000, '10.9 TB'], | |
[130000000000000, '118.2 TB'], | |
[1400000000000000, '1273.3 TB'], | |
[15000000000000000, '13642.4 TB'], | |
])('.bytesToSize(%p)', ( | |
val: number, | |
expected: string, | |
) => { | |
expect( | |
bytesToSize(val), | |
).toBe(expected); | |
}); | |
}); |
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