Adding event listener to forms added via AJAX

sample.js

var formObj = document.getElementById('form-loaded-via-ajax');
// ^^ Use any form of method to get the DOM object here

formObj.addEventListener("submit", function(event) {
    if (typeof event.target[CSRFP.CSRFP_TOKEN] === 'undefined') {
        event.target.appendChild(CSRFP._getInputElt());
    } else {
        //modify token to latest value
        event.target[CSRFP.CSRFP_TOKEN].value = CSRFP._getAuthKey();
    }
});