// input html`<d${literal`iv`} .asdf=${123}>${tmpl}</d${literal`iv`}>`
// truncated parse5 output
{
  nodeName: 'd${literal`iv`}',
  attrs: [
    {
        name: '.asdf',
        value: '${123}'
    },
    childNodes: [
      {
        nodeName: '#text',
        value: '${tmpl}'
      }
    ]
  ]
}

{
  type: 'DocumentFragment',
  children: [
    {
      type: 'Element',
      // stringified tag name: 'd${...}'
      tagName: [ // tagname is actually an array not a string
        {
          type: 'LitTagLiteral', // lit-parser-specific node
          value: 'd'
        },
        {
          type: 'LitHtmlExpression', // lit-parser-specific node
          nodeName: '#lit-html-expression',
          expression: {
            type: 'TaggedTemplateExpression', // estree node
            tag: {
              type: 'Identifier', // estree node
              name: 'literal'
            },
            quasi: {
              type: 'TemplateLiteral' // estree node
            }
          }
        }
      ],
      attributes: [
        {
          type: 'Property', // lit-parser-specific node
          name: {
            // stringified tag name: '.asdf',
            raw: [
              {
                type: 'LitTagLiteral', // lit-parser-specific node
                value: '.asdf'
              }
            ]
          },
          value: [
            {
              nodeName: '#lit-html-expression',
              type: 'LitHtmlExpression', // lit-parser-specific node
              node: {
                type: 'Literal', // estree node
                value: 123
              }
            }
          ]
        }
      ],
      childNodes: [
        {
          nodeName: '#lit-html-expression',
          type: 'LitHtmlExpression', // lit-parser-specific node
          node: {
            type: 'Identifier', // estree node
            name: 'tmpl'
          }
        }
      ]
    }
  ]
}