Number base conversion, hex, dec, binary

The snippet uses the native Javascript function so it should be more efficient then for instance using arithmetic or looped bitwise operations etc.

Examples:

// convert the decimal 10 to hex 
Math.base(10, 16); // 'a'

// convert the hex 'a' to decimal 
Math.base('a', 10, 16); // 10

// convert the decimal 10 to binary
Math.base(10, 2); // '1010'

// convert the hex 'a' to decimal 
Math.base('a', 2, 16); // 1010

Base conversion in JavaScript