Datum is, from its Latin origin, a singular form of data, and may refer to a single item of data. 1 Singular data point.
Front-end developers are responsible for a websiteâs user-facing code and the architecture of its immersive user experiences. In order to execute those objectives, front-end devs must be adept at three main languages: HTML, CSS, and Javascript programming.
1 That's a huge benefit.  Using the same language on the front-end and the back-end allows you to run the same code on both sides. For instance, for all properties of a model class you need to provide proper validation both on the front-end (in the UI) and the back-end (before save).