JSFiddle - React, Tailwind, and code Playground

HTML

<input type="text" />

JavaScript

$('input').on('keyup', function(e) {
    if (e.which !== 32) {
        var value = $(this).val();
        var noWhitespaceValue = value.replace(/\s+/g, '');
        var noWhitespaceCount = noWhitespaceValue.length;
        if (noWhitespaceCount % 3 === 0) {
            // Call API
            console.log('API Called');
        }
    }
});