Which of the following would commonly use the HTML5 canvas API?

The HTML5 canvas API is specifically designed for rendering graphics and creating dynamic visual content within web applications. This API allows developers to draw shapes, create animations, and build interactive games directly within a web browser using JavaScript. It provides a versatile platform for graphical applications, enabling the manipulation of images and the creation of visually rich experiences.

For instance, when designing dynamic graphics, developers can use the canvas element to create everything from simple animations to complex visual data representations. Similarly, when building games, the canvas API becomes essential as it allows for real-time rendering of game graphics, responding to user inputs and rendering character movements fluidly.

In contrast, creating a database, building user authentication systems, or implementing server-side logic involve different technologies and aren’t relevant to the capabilities of the HTML5 canvas API. These tasks typically involve server-side programming languages or database management systems, which do not leverage the graphical rendering features that the canvas API provides. Thus, the correct focus on designing dynamic graphics or games highlights the specific application of the HTML5 canvas API.