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JavaScript is a versatile, high-level programming language. It is the programming language in all browsers.and can be used for back-end programming with node.js. Use this tag for questions regarding vanilla JavaScript; optionally tagged with an ECMAScript version. If you are using a preprocessor such as TypeScript please tag with that too.

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Bank account number validation in IBAN format

I wrote a JavaScript function for validating bank account numbers in IBAN format for my own joy. Could you have a look if you don't see any obvious mistakes or places for improvement? …
Grzegorz Piwowarek's user avatar