AngularJS byte format filter

gistfile1.js

app.filter('bytes', function() {
	return function(bytes, precision) {
		if (isNaN(parseFloat(bytes)) || !isFinite(bytes)) return '-';
		if (typeof precision === 'undefined') precision = 1;
		var units = ['bytes', 'kB', 'MB', 'GB', 'TB', 'PB'],
			number = Math.floor(Math.log(bytes) / Math.log(1024));
		return (bytes / Math.pow(1024, Math.floor(number))).toFixed(precision) +  ' ' + units[number];
	}
});

Here it is for Angular ( I just formatted this up a bit, am using Angular7) - I did not port in the Unit Tests, but didn't modify the values, so, might be able to Angularize those as well

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

@Pipe({
  name: 'byteFormatter'
})
export class ByteFormatterPipe implements PipeTransform {

  transform(bytes: string | number, precision: number): any {

    if (isNaN(parseFloat(bytes.toString())) || !isFinite(Number(bytes))) {
      return '-';
    }

    if (typeof precision === 'undefined') {
      precision = 1;
    }

    const units = ['bytes', 'kB', 'MB', 'GB', 'TB', 'PB'];
    const actualValue = Math.floor(Math.log(Number(bytes)) / Math.log(1024));

    return (Number(bytes) / Math.pow(1024, Math.floor(actualValue))).toFixed(precision) + ' ' + units[actualValue];

  }
}