jtc-utils/mjs/isTelephoneNo.js

Utilities for Japanese Traditional Companies

export function isTelephoneNo(value) {
    if (value == null) {
        return false;
    }
    if (!/^(\+[0-9]{1,3}(-| *))?(\([0-9]{1,6}\) *)?([0-9]-?){1,15}$/.test(value)) {
        return false;
    }
    const nums = value.replace(/[^0-9]/g, "");
    if (nums.length > 15) {
        return false;
    }
    return true;
}
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