JSFiddle - React, Tailwind, and code Playground

HTML

<input type="email" name="email" placeholder="Email" class="email required valid" id="aim_Email">
<input type="password" name="password" id="aim_Password" placeholder="Password" class="newpassword password required aimError" style="">

<input type='button' class='submit' value='test'/>

JavaScript

$('.submit').prop('disabled',true); // <-- disable button on load
$('.required').keyup(function() { // <-- bind keyup to both required inputs
    $('.required').each(function(i, v) { // <-- loop through each required field
            $(v).toggleClass('valid',$(v).val().trim().length > 0); // <-- add class if it has text
    }); 
    $('.submit').prop('disabled', $('.valid').length != 2);
});