test.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Test of Table</title>

    <style>

        body, html {
            margin: 0;
        }

        body {
            display: flex;
            flex-direction: column;
            align-items: center;
        }

        #editorjs {
            width: 800px;
            margin-top: 10px;
        }

    </style>

</head>
<body>

<div id="editorjs"></div>

<script src="//cdn.jsdelivr.net/npm/@editorjs/editorjs@latest"></script>
<script src="dist/bundle.js"></script>
<script>
    const editor = new EditorJS({
      autofocus: true,
      data: {
        time: 1593767457585,
        blocks: [
          {
            type: 'table',
            data: {
              content: [
                ['a', 'table'],
                ['tool', 'test'],
                ['press', 'tab'],
              ]
            }
          }
        ],
        version: '2.18.0',
      },
      placeholder: 'Table tool test',
      holder: 'editorjs',
      tools: {
        table: {
          class: Table,
          inlineToolbar: true,
          config: {
            rows: 3,
            cols: 3
          }
        }
      }
    })
</script>

</body>
</html>