UnitApi / js

include/include-html.js

function includeHtml(url, target, error, success) {

This code seems to be duplicated in your project.

    var xhttp;

    var el = new E(target);

The variable E seems to be never declared. If this is a global, consider adding a /** global: E */ comment.

    var elmnt = el.first();

    if (typeof success !== 'function') {
        success = function () {
            console.log('includeHtml success', "included");

console.log looks like debug code. Are you sure you do not want to remove it?

        }
    }

    if (typeof error !== 'function') {
        error = function () {
            console.log('includeHtml error', "Page not found.");

console.log looks like debug code. Are you sure you do not want to remove it?

        }
    }
    console.log('includeHtml url', url);

console.log looks like debug code. Are you sure you do not want to remove it?

    if (url) {

There is no return statement if url is false. Are you sure this is correct? If so, consider adding return; explicitly.

        /* Make an HTTP request using the attribute value as the url name: */
        xhttp = new XMLHttpRequest();
        xhttp.onreadystatechange = function () {
            console.log('includeHtml el_id', target);

console.log looks like debug code. Are you sure you do not want to remove it?

            if (this.readyState == 4) {
                if (this.status == 200) {
                    // console.log('elmnt', elmnt);
                    // console.log('responseText', this.responseText);
                    // elmnt.innerHTML = this.responseText;
                    // elmnt.appendChild(this.responseText);
                    // elmnt.insertAdjacentHTML('beforeend', this.responseText);
                    // var e = document.createElement('div');
                    // e.innerHTML = this.responseText;
                    // while(e.firstChild) {
                    // elmnt.appendChild(e);
                    // }

                    // elmnt.insertAdjacentHTML('afterend', this.responseText);
                    elmnt.insertAdjacentHTML('beforeend', this.responseText);

                    success(this);

The call to success seems to have too many arguments starting with this.

                }
                if (this.status == 404) {
                    elmnt.innerHTML = "includeHtml Page not found.";
                    error(this);

The call to error seems to have too many arguments starting with this.

                }
                /* Remove the attribute, and call this function once more: */
                // includeHtml(url, success, error);
            }
        }
        xhttp.open("GET", url, true);
        xhttp.send();
        /* Exit the function: */
        return this;
    }
}