Building an app screen with React Native ⚛️

Kelvin Graddick · 3 minute read ·     

React Native has revolutionized mobile app development by allowing developers to build powerful and efficient cross-platform applications using JavaScript.

As I delve into developing a mobile app using React Native, I found it essential to dissect the various components that constitute a typical React Native screen. In this article, we'll explore the different pieces that come together to create a React Native component, maintaining a focus on an app screen.

So, let's dive into the world of React Native development and unravel the key elements involved in constructing a component.

Building an app screen with React Native

Imports: Ensuring the Foundation Is Set

The first step in building a React Native component is to declare and import all the necessary external libraries, components, and files. This straightforward process establishes the foundation for the component's functionality and ensures that the required dependencies are available for use.

Building an app screen with React Native

Function Component Declaration: Defining the Screen

Next, we proceed to declare the screen or component itself. By using a function component declaration, we can encapsulate the logic and rendering capabilities within a single entity. In this instance, we pass a route object to the component, enabling us to retrieve the plant ID query string value and incorporate it into the functionality.

Building an app screen with React Native

State: Managing Dynamic Data

React's State Hook plays a vital role in managing dynamic data within a component. By employing this powerful tool, we define an object that holds the state of the current plant and a corresponding function to update it. The State Hook ensures that the component remains responsive to user interactions and enables seamless data updates.

Building an app screen with React Native

Effect: Immediate Actions on Screen Render

To perform actions immediately upon screen render, we utilize React's Effect Hook. By defining a function within the Effect Hook, we can retrieve the plant data required for the component. This hook ensures that the necessary data is fetched as soon as the screen is displayed, facilitating a smooth and streamlined user experience.

Building an app screen with React Native

Custom Function: Interacting with Firebase Datastore

Sometimes, accessing data from an external source is necessary for a React Native component. In such cases, defining a custom function allows us to retrieve specific data, such as plant information, from the Firebase datastore. This functionality enhances the versatility and extensibility of the component, enabling seamless integration with external APIs and services.

Building an app screen with React Native

JSX: Declarative UI/UX Elements

The user interface and user experience (UI/UX) elements of a React Native component are constructed using JSX. This unique syntax allows developers to write elements directly within JavaScript, promoting a declarative approach to building the UI. By leveraging JSX, we can easily create and manipulate various UI components, such as buttons, text inputs, and images, ensuring an intuitive and visually appealing user interface.

Building an app screen with React Native

Style: Defining Visual Characteristics

To provide the desired visual characteristics to the UI elements, we define the style using a language reminiscent of CSS. React Native employs a style system that shares similarities with CSS, making it familiar and accessible to web developers. This approach enables the creation of visually appealing screens by specifying attributes such as color, size, layout, and positioning.

Building an app screen with React Native


Building a React Native component requires understanding the fundamental elements that come together to create a functional and visually captivating user interface.

By dissecting these different elements - imports, function component declaration, state management, effects, custom functions, JSX, and style - we gain insights into the intricacies of React Native development.

As you embark on your React Native journey, familiarize yourself with these building blocks, and explore the endless possibilities of creating compelling cross-platform mobile applications.

Have you had any experience working with React or React Native? Feel free to share your insights and experiences in the comments below!

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