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He estado tratando de hacer una validación para el número de teléfono donde alertará al usuario si no siguió el formato. ¿Cómo lo hago?

Aquí está mi código hasta ahora. ¿Cómo puedo lograr lo que necesito usando JavaScript?

 var form = document.getElementById('form-body') var error = [] form.addEventListener('submit', function(e){ e.preventDefault(); var name = document.getElementById('name'); var phone = document.getElementById('phone'); var email = document.getElementById('email'); var bday = document.getElementById('bday'); if (phone.value !== [0]{1}?[9]{1}?[0-9]{9}) alert('Follow the correct format (09XXXXXXXXX)') })
about 4 years ago · Juan Pablo Isaza
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