Sharing and clipboard in React Native

Introduction

Sharing lets users send text or files from your app to other apps. Clipboard lets users copy and paste text easily.

When you want users to share a message or link with friends via other apps.

When users need to copy text from your app to paste somewhere else.

When you want to let users paste text into your app from other apps.

When you want to share images or files from your app to social media or email.

When you want to provide a quick way to copy a code or URL for later use.

Syntax

React Native

import { Share } from 'react-native';
import Clipboard from '@react-native-clipboard/clipboard';

// To share text
Share.share({ message: 'Hello from my app!' });

// To copy text to clipboard
Clipboard.setString('Text to copy');

// To get text from clipboard
const text = await Clipboard.getString();

Use Share.share() to open the system share dialog.

Use Clipboard.setString() to copy text, and Clipboard.getString() to read text.

Examples

This opens the share dialog with the message to share.

React Native

Share.share({ message: 'Check out this cool app!' });

This copies the text so the user can paste it elsewhere.

React Native

Clipboard.setString('Copy this text');

This reads the current text from the clipboard and logs it.

React Native

const copiedText = await Clipboard.getString();
console.log(copiedText);

Sample App

This app shows two buttons. One opens the share dialog with a message. The other copies text to the clipboard and shows an alert.

React Native

import React from 'react';
import { View, Button, Alert } from 'react-native';
import { Share } from 'react-native';
import Clipboard from '@react-native-clipboard/clipboard';

export default function App() {
  const shareMessage = () => {
    Share.share({ message: 'Hello from React Native!' });
  };

  const copyToClipboard = () => {
    Clipboard.setString('This text is copied!');
    Alert.alert('Copied!', 'Text has been copied to clipboard.');
  };

  return (
    <View style={{ flex: 1, justifyContent: 'center', alignItems: 'center' }}>
      <Button title="Share Message" onPress={shareMessage} />
      <View style={{ height: 20 }} />
      <Button title="Copy Text" onPress={copyToClipboard} />
    </View>
  );
}

Important Notes

Clipboard API only works with text, not images or files.

Sharing can include URLs, text, and sometimes files depending on platform support.

Always test sharing on both Android and iOS as behavior can differ slightly.

Summary

Sharing lets users send content from your app to others easily.

Clipboard lets users copy and paste text between apps.

React Native provides simple APIs to use both features.

Practice

1. What is the main purpose of the Clipboard API in React Native?

easy

A. To copy and paste text between apps

B. To share images on social media

C. To send emails from the app

D. To open external web links

Solution

1. Step 1: Understand Clipboard functionality

   The Clipboard API is designed to handle text copying and pasting between apps.

2. Step 2: Compare with other options

   Sharing images, sending emails, and opening links are not Clipboard's main tasks.

3. Final Answer:

   To copy and paste text between apps -> Option A

4. Quick Check:

   Clipboard = copy-paste text [OK]

Hint: Clipboard is for copy-paste text only [OK]

Common Mistakes:

• Confusing Clipboard with sharing images
• Thinking Clipboard sends emails
• Assuming Clipboard opens web links

2. Which of the following is the correct way to import the Clipboard API in React Native?

easy

A. import { Clipboard } from 'react-native';

B. import Clipboard from '@react-native-clipboard/clipboard';

C. import Clipboard from 'react-native';

D. import Clipboard from 'react-native-clipboard';

Solution

1. Step 1: Identify the official Clipboard package

   React Native moved Clipboard to a separate package '@react-native-clipboard/clipboard'.

2. Step 2: Check import syntax

   The correct import is default import from '@react-native-clipboard/clipboard'.

3. Final Answer:

   import Clipboard from '@react-native-clipboard/clipboard'; -> Option B

4. Quick Check:

   Clipboard import = '@react-native-clipboard/clipboard' [OK]

Hint: Clipboard is from '@react-native-clipboard/clipboard' package [OK]

Common Mistakes:

• Importing Clipboard directly from 'react-native'
• Using named import instead of default
• Using wrong package names

3. What will be the output of this React Native code snippet?

import Clipboard from '@react-native-clipboard/clipboard';

Clipboard.setString('Hello World');
const text = await Clipboard.getString();
console.log(text);

medium

A. undefined

B. Error: Clipboard.getString is not a function

C. 'Hello World'

D. null

Solution

1. Step 1: Understand Clipboard.setString usage

   This sets the clipboard content to 'Hello World'.

2. Step 2: Understand Clipboard.getString usage

   It asynchronously retrieves the clipboard content, which is 'Hello World'.

3. Final Answer:

   'Hello World' -> Option C

4. Quick Check:

   Clipboard content = 'Hello World' [OK]

Hint: Clipboard.getString returns the last set string [OK]

Common Mistakes:

• Forgetting await on Clipboard.getString
• Expecting undefined or null instead of set string
• Confusing Clipboard API methods

4. You wrote this code to share text but it does not work:

import { Share } from 'react-native';

const shareText = async () => {
  Share.share('Hello!');
};

What is the error?

medium

A. You cannot share text in React Native

B. Share must be imported from '@react-native-share/share'

C. Share.share is not async function

D. Share.share requires an object with a message property

Solution

1. Step 1: Check Share.share argument type

   Share.share expects an object like { message: 'text' }, not a string.

2. Step 2: Identify correct usage

   Passing a string directly causes failure; must pass { message: 'Hello!' }.

3. Final Answer:

   Share.share requires an object with a message property -> Option D

4. Quick Check:

   Share.share argument = object with message [OK]

Hint: Share.share needs { message: 'text' } object [OK]

Common Mistakes:

• Passing string directly instead of object
• Importing Share from wrong package
• Ignoring async/await usage

5. You want to create a button that copies user input text to clipboard and then shares it. Which code snippet correctly combines Clipboard and Share APIs?

hard

A. const copyAndShare = async (text) => {
await Clipboard.setString(text);
await Share.share({ message: text });
};

B. const copyAndShare = (text) => {
Clipboard.setString(text);
Share.share(text);
};

C. const copyAndShare = async (text) => {
Clipboard.setString(text);
Share.share({ message: await Clipboard.getString() });
};

D. const copyAndShare = async (text) => {
await Clipboard.getString();
await Share.share({ message: text });
};

Solution

1. Step 1: Use async/await for Clipboard.setString

   Clipboard.setString returns a promise, so await ensures text is copied before sharing.

2. Step 2: Pass correct object to Share.share

   Share.share requires an object with message property containing the text to share.

3. Step 3: Verify combined usage

   const copyAndShare = async (text) => { await Clipboard.setString(text); await Share.share({ message: text }); }; correctly awaits Clipboard.setString and then shares the same text properly.

4. Final Answer:

   const copyAndShare = async (text) => { await Clipboard.setString(text); await Share.share({ message: text }); }; -> Option A

5. Quick Check:

   Await Clipboard.setString + Share.share({ message }) [OK]

Hint: Await Clipboard.setString before Share.share({ message }) [OK]

Common Mistakes:

• Not awaiting Clipboard.setString
• Passing string directly to Share.share
• Calling Clipboard.getString unnecessarily