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^([0-9]{4}|[0-9]{6})$
const isExactly5Digits = /\b\d{5}\b/g.test(someString);
const isAtLeast5Digits = /\(|\)|\d{5}/.test(someString);
xxxxxxxxxx
const isExactly5Digits = /\b\d{5}\b/g.test(someString);
const isAtLeast5Digits = /\(|\)|\d{5}/.test(someString);