map(n => `<a href="https://github.com/${n}" target="_blank" title="contributor">${n}</a>`).join(', ')
      html += `<tr><td>üòé</td><td>${s}</td></tr>`
    }
    html += '</table>'
    d3.select('#popup')
      .style('visibility', 'visible')
      .style('opacity', 0)
      .html(html)
      .on('mouseenter', event => {
        if (popup) {
          popup.popupHover = true
          clearTimeout(hoverTimeout)
          hoverTimeout = null
        }
      })
      .on('mouseleave', event => {
      