XMLHttpRequest in received response not working JS?

Question

ASP.NET

Hello!
There is a site on ASP Net CORE. Wrote an AJAX function to get a partial view that has JS in the body. Everything loads fine, but the script doesn't work, why? Although earlier the request was made through jquery and everything worked like clockwork. But for the sake of one function I do not want to use the library. Why doesn't js work in response and how to fix it?
Here is my function:

function commentNewShow() {
        var formData = new FormData();
        formData.append('Url', '@url');
        formData.append('UrlName', '@title');

        var xhr = new XMLHttpRequest();
        xhr.open("POST", '/Comments/NewForm', true);
        xhr.send(formData);

        xhr.onreadystatechange = function (e) {
            if (xhr.readyState == 4) {
                if (xhr.status == 200) {
                    var commentNew = document.getElementById('commentNew');
                    commentNew.innerHTML = xhr.responseText;
                } else {
                    alert('Возникла ошибка. Попробуйте позже.');
                }
            }
        };
    }

Answer 1

in jq, somewhere inside, eval () is called,
like they did something like this

commentNew.innerHTML = xhr.responseText;
var scripts = commentNew.getElementsByTagName("script");
for (var i = 0; i < scripts.length; i++) {
    eval(scripts[i].innerText);
}