Angular File size Pipe/Filter. Convert bytes into largest possible unit. e.g. 1024 => 1 KB

import { Pipe, PipeTransform } from '@angular/core';

@Pipe({

name: 'filesize'

})

export class FilesizePipe implements PipeTransform {

private units = [

'bytes',

'KB',

'MB',

'GB',

'TB',

'PB'

];

transform(bytes: number = 0, precision: number = 2 ): string {

if ( isNaN( parseFloat( String(bytes) )) || ! isFinite( bytes ) ) {

return '?';

}

let unit = 0;

while ( bytes >= 1024 ) {

bytes /= 1024;

unit ++;

}

return bytes.toFixed( + precision ) + ' ' + this.units[ unit ];

}

}