BUG: When you delete a component, duplicate classes between components will be deleted.

You should avoid putting shared styles in component-related ones. Check this discussion on how to prevent this: https://github.com/GrapesJS/grapesjs/discussions/5968

As a temporary workaround, styles for each component are prefixed with id.

import { html as hero1html, css as hero1css } from './data/hero-1';
import { html as content1html, css as content1css } from './data/content-1';
const sources = [
  {
    id: 'hero-1',
    name: 'Hero 1',
    category: 'Hero',
    html: hero1html,
    css: hero1css,
    class: 'bg-gray-100 p-5',
  },
  {
    id: 'content-1',
    name: 'Content 1',
    category: 'Content',
    html: content1html,
    css: content1css,
    class: 'p-5',
  }
]

const escapeTailwindClasses = (str, id) => {
  return str.replace(/(\.[a-z0-9_-]+)(:\w+)/gi, (match, p1, p2) => {
    return `.${id}${p1.replace('.', '')}\\${p2}`;
  });
};

export const importBlocks = (editor, options = {}) => {
  const domc = editor.DomComponents;
  const blockManager = editor.BlockManager;
  sources.forEach(source => {
    const prefix = source.id + '-';
    const prefixedHtml = source.html.replace(/class="([^"]*)"/g, (match, className) => {
      return `class="${className.split(' ').map(cn => prefix + cn).join(' ')}"`;
    });

    const prefixedCss = source.css.replace(/\.([a-z0-9_-]+)(?=\s*[{,])/gi, (match, className) => {
      return '.' + prefix + className;
    });

    console.log(escapeTailwindClasses(prefixedCss, prefix))
    const prefixedClasses = source.class.split(' ').map(cn => prefix + cn).join(' ');
    domc.addType(source.id, {
      model: {
        defaults: {
          attributes: { class: prefixedClasses },
          components: prefixedHtml,
          styles: escapeTailwindClasses(prefixedCss, prefix),
        },
      },
    });
    blockManager.add(source.id, {
      category: source.category,
      id: source.id,
      label: source.name,
      content: {
        type: source.id,
      },
    });
  });
}

@artf thank you for your reply. I would like to confirm #5968