JSFiddle - React, Tailwind, and code Playground

by aquadk

HTML

<rn:widget path="input/FormInput" name="Contact.Emails.PRIMARY.Address" required="false" label_input="E-postadress" default_value="[email protected]" />

<p id="Message"></p>

<rn:widget path="input/FormInput" name="Incident.Subject" required="true" label_input="Subject" />

<input type="email" id="rn_TextInput_4_Contact.Emails.PRIMARY.Address" name="Contact.Emails.PRIMARY.Address" class="rn_Email" maxlength='80' value='[email protected]' />

<input type="text" id="rn_TextInput_11_Incident.Subject" name="Incident.Subject" class="rn_Text" maxlength='240' required  />

<script>
document.querySelector('input[name="Incident.Subject"]').onchange = function() {
    var x = document.querySelector('input[name="Contact.Emails.PRIMARY.Address"]').value;
        if (x == '[email protected]') {
            document.getElementById("Message").innerHTML = 'Some text...';
        }
}
</script>