stdnum/lib/esm/util/iso7064.js

Standard Number Validation

export function iso7064mod10x11validate(value) {
    const check = value
        .split('')
        .map(v => parseInt(v, 10))
        .reduce((acc, v) => ((((acc === 0 ? 10 : acc) * 2) % 11) + v) % 10, 5);
    return check === 1;
}
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