What is the best way to implement Django's email validation on the front end?

I am currently utilizing the user registration URL provided by Django Rest Auth:

urlpatterns = [
   #...
   path("registration/", include("dj_rest_auth.registration.urls")),
   #...
]

This particular route involves email validation. However, I am interested in prevalidating email addresses before sending them to the server.

By applying a basic regex on the front end, some email addresses may pass through that are rejected by dj_rest_auth:

/^[^\s@]+@[^\s@]+\.[^\s@]+$/.test(email)

For instance, 

<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="305170521e53">[email protected]</a>
may pass through but get rejected by Django.

I aim to align the client-side validation with the server side as closely as possible. What regex pattern does dj_rest_auth utilize for validation?

javascriptdjangovalidationemaildjango-rest-auth

Answer №1

Adjusting the length can be done in the following way

const validateEmail = (email) => /[a-z0-9]+@[a-z]+\.[a-z]{2,3}/.test(email)

console.log(validateEmail('<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="204160420e43">[email protected]</a>'))
console.log(validateEmail('<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="01726e6c646e6f6441756472752f626e6c">[email protected]</a>'))

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