ction will be called. The &#39;this&#39; context for the function will be a Selection to which you can append your new element. The first argument to the function will be the piece of data that you are transforming into dom elements, and the second argument is an index. </div><div class="qm-html-paragraph">This function only gets called for new elements being added to the page. If you call view.apply(data) repeatedly where the size of the data does not change, then the enter function will only be called the