@virsas/vue-components/src/utils/validation/telephone.js

Virsas Vue3 and/or Quasar2 component library

export const isValidTelephone = (val) => {
  const telephonePattern = /^\+\d{7,15}$/;
  if (telephonePattern.test(val)) {
    return true;
  } else {
    return false;
  }
};