Learn to create a custom progress button in React Native and TypeScript

Table of Contents

How to create a custom progress button in React Native with TypeScript:

In this post, I will show you how to create a custom progress button in React Native using TypeScript. We will create a button component that will take different props to customize its style.

`props` of the button:

The following interface will be used as the button props:

interface LoadingButtonProps {   backgroundColorDefault: string;   backgroundColorLoading: string;   isLoading: boolean;   indicatorColor: string;   indicatorSize: number | "small" | "large" | undefined;   textColorDefault: string;   textColorLoading: string;   text: string;   textLoading: string;   fontSize: number;   width: number;   height: number;   borderRadius: number;   onPress: () => void; }

Here,

backgroundColorDefault is the default color for the button.
backgroundColorLoading is the color of the button on the loading state.
isLoading defines the current state.
indicatorColor is the color of the activity indicator.
indicatorSize is the size of the activity indicator.
textColorDefault is the default font color.
textColorLoading is the font color when the button is loading.
text is the default text.
textLoading is the text to show on loading.
fontSize is the font size.
width is the width of the button.
height is the height of the button.
borderRadius is the border radius of the button.
onPress is a callback method to invoke when user taps on the button.

Button component:

Let’s create one new component LoadingButton.tsx with the following code:

import React from "react"; import { Pressable, View, Text, ActivityIndicator } from "react-native";  interface LoadingButtonProps {   backgroundColorDefault: string;   backgroundColorLoading: string;   isLoading: boolean;   indicatorColor: string;   indicatorSize: number | "small" | "large" | undefined;   textColorDefault: string;   textColorLoading: string;   text: string;   textLoading: string;   fontSize: number;   width: number;   height: number;   borderRadius: number;   onPress: () => void; }  const LoadingButton = (props: LoadingButtonProps) => {   return (     <Pressable onPress={props.onPress}>       <View         style={{           backgroundColor: props.isLoading             ? props.backgroundColorLoading             : props.backgroundColorDefault,           width: props.width,           height: props.height,           borderRadius: props.borderRadius,           alignItems: "center",           justifyContent: "center",           flexDirection: "row",         }}       >         {props.isLoading && (           <ActivityIndicator             size={props.indicatorSize}             style={{ paddingEnd: 10 }}             color={props.indicatorColor}           />         )}         <Text           style={{             color: props.isLoading               ? props.textColorLoading               : props.textColorDefault,             fontSize: props.fontSize,           }}         >           {props.isLoading ? props.textLoading : props.text}         </Text>       </View>     </Pressable>   ); };  export default LoadingButton;

This is the loading button.

It uses a Pressable as its parent component.
The visibility of the ActivityIndicator is controlled by the isLoading value of the props. Other styles are added as defined by the props to the components.

`App.tsx` file changes:

We can use the above component in any other component. For example, the following code uses the LoadingButton component:

import React, { useState } from "react"; import { SafeAreaView, StyleSheet } from "react-native"; import LoadingButton from "./LoadingButton";  const App = () => {   const [loading, setLoading] = useState(false);    const onPressButton = () => {     setLoading(!loading);   };    return (     <SafeAreaView style={styles.container}>       <LoadingButton         backgroundColorDefault="#6750A4"         backgroundColorLoading="#79747E"         isLoading={loading}         indicatorColor="white"         indicatorSize={26}         textColorDefault="white"         textColorLoading="white"         text="Download"         textLoading="Downloading.."         fontSize={20}         width={300}         height={60}         borderRadius={10}         onPress={onPressButton}       />     </SafeAreaView>   ); };  const styles = StyleSheet.create({   container: {     flex: 1,     alignItems: "center",     justifyContent: "center",   }, });  export default App;

Output:

The state of the button is changed on clicking on it. If you run it on Android device, it will look as below:

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