grapesjs-cli/dist/template/src/blocks.js

GrapesJS CLI tool for the plugin development

export default (editor, opts = {}) => {
  const bm = editor.BlockManager;

  bm.add('MY-BLOCK', {
    label: 'My block',
    content: { type: 'MY-COMPONENT' },
    // media: '<svg>...</svg>',
  });
}