_README.md

Convert body fields from HTML to Markdown

• Install Drupal Console

• Install PHP dependency

composer require league/html-to-markdown

• Copy content of convert-html-markdown.php to console/snippet/

• Execute drupal console snippet command

ahoy drupal snippet --file=console/snippet/convert-html-markdown.php

convert-html-markdown.php

<?php

use League\HTMLToMarkdown\HtmlConverter;

$nodeStorage = \Drupal::entityTypeManager()
    ->getStorage('node');

$nodes = $nodeStorage->loadMultiple();

$converter = new HtmlConverter();

foreach ($nodes as $node) {

  if (!$node->hasField('body')) {
    continue;
  }

  echo 'Updating node ' . $node->id() . ' - ' . $node->label() . PHP_EOL;  

  $markdown = $converter->convert($body);
  $node->set('body', $markdown);
  $node->body->format = 'full_html';

  $node->save();
}