Javascript Split String at First Numeric

Question

I am trying to split a UK postcode string to only include the initial letters. For example, 'AA1 2BB' would become 'AA.'

I was thinking something like the below.

var postcode = 'AA1 2BB';
var postcodePrefix = postcode.split([0-9])[0];

This does not actually work, but can someone help me out with the syntax?

Thanks for any help.

Answer 1

Alternatively, you could use a regex to simply find all alphabetic characters that occur at the beginning of the string:

var postcode = 'AA1 2BB';
var postcodePrefix = postcode.match(/^[a-zA-Z]+/);

If you want any initial characters that are non numeric, you could use:

var postcodePrefix = postcode.match(/^[^0-9]+/);