Here's how to do it with an entity builder callback without any additional contrib module like "Automatic Entity Label" or "Automatic Nodetitles", using only Drupal core functionality.
Articles
21
Mar.2017
Youtube: Fluid Width Video
You can make YouTube videos responsive with CSS. Wrap the iframe in a div with the class of "youtube-container" and apply the styles.
Here is a very quick and simple example of how to create an administrator on any drupal 7 website.
The example which shows how to build a nice chart using a minimum of JS code written.
4
Jan.2017
Responsive Equal Height elements
A simple JavaScript code to equalise heights of multiple elements on a page. The basic idea is to measure all of their heights and then set all their heights to that of the tallest one.