One-way versus two-way data flow

When you pass data from one component to another component either through props or binding, data flows from one component to another component. The term data flow refers to how data is passed or transmitted between components or elements within a web application.

Understanding data flow is important when designing an application’s architecture, as it helps to establish clear lines of communication between components and determine how information is shared and updated throughout the system.

Data flow can be unidirectional (one-way) or bidirectional (two-way), depending on how data is transferred between components.

In one-way data flow, data moves in a single direction, from a parent to a child component, or from a component to a DOM element. This unidirectional flow is achieved through component props or DOM element attributes.

For example, consider the following code snippets featuring two components, component A and component B...