React Native
Create multipart/alternative MIME

Demonstrates how to create a multipart/alternative MIME structure using the NewMultipartAlternative method.
Chilkat React Native Downloads

React Native
import { Mime } from '@chilkat/react-native'

function chilkatExample() {
  // This example requires the Chilkat API to have been previously unlocked.
  // See Global Unlock Sample for sample code.

  // Start with an empty MIME object...
  const mime = new Mime();

  // Initialize it as multipart/alternative.
  mime.newMultipartAlternative();

  // Create a text/plain part.
  const ptMime = new Mime();
  ptMime.setBodyFromPlainText('This is the plain text body.');
  console.log(ptMime.getMime());
  console.log('****');

  // The text/plain part looks like this:

  // 	Content-Type: text/plain
  // 	Content-Transfer-Encoding: 7bit
  // 
  // 	This is the plain text body.

  // Create a text/HTML part.
  const htmlMime = new Mime();
  htmlMime.setBodyFromHtml('<html><body><p>This is the <b>HTML body</b></p></body></html>');
  console.log(htmlMime.getMime());
  console.log('****');

  // The text/html part looks like this:

  // 	Content-Type: text/html
  // 	Content-Transfer-Encoding: 7bit
  // 
  // 	<html><body><p>This is the <b>HTML body</b></p></body></html>

  // Add both parts as children of the multipart/alternative
  mime.appendPart(ptMime);
  mime.appendPart(htmlMime);
  console.log(mime.getMime());

  // This the result.  The boundary string was automatically generaetd.

  // 	Content-Type: multipart/alternative; boundary="------------080803090906030708030908"
  // 
  // 	--------------080803090906030708030908
  // 	Content-Type: text/plain
  // 	Content-Transfer-Encoding: 7bit
  // 
  // 	This is the plain text body.
  // 	--------------080803090906030708030908
  // 	Content-Type: text/html
  // 	Content-Transfer-Encoding: 7bit
  // 
  // 	<html><body><p>This is the <b>HTML body</b></p></body></html>
  // 	--------------080803090906030708030908--
}