gistfile1.txt

function colors (onclick) {
    var pkeys = Object.keys(state.paletteMap)
    var prows = []
    for (var i = 0; i < pkeys.length; i += 10) {
      prows.push(pkeys.slice(i,i+10))
    }
    return html`<div class="colors">
      ${prows.map(function (row) {
        return html`<div>
          ${row.map(function (src) {
            var dst = state.paletteMap[src]
            return html`<button style="background-color:#${dst}"
              class=${dst === state.activeColor ? 'selected' : ''}
              onclick=${function (ev) { onclick(dst,ev) }}></button>`
          })}
        </div>`
      })}
    </div>`
  }