Web | jQuery | element remove, delete child element

function updateTweetDelete(tweet_id) {
//    console.log(tweet_id);
    $.ajax({
        url: '/update_tweet_delete',
        data: {'twt_id': tweet_id},
        success: function(resData) {
            console.log(resData);
            if (resData.error_msg) {
                alert(resData.error_msg);
            }
            else{
                alert(resData.success_msg);
                // 글 지워주고
                parentElement = document.getElementById("section_tweetlist_body");
                targetElement = document.getElementById("#tweet_num_" + resData.twt_id);
                parentElement.removeChild(targetElement);
                // profile 의 tweets count refresh
            }
        }
    });
}