How to use the snabbdom-selector.default function in snabbdom-selector

vt = hToVDOM(vToHTML(vt)) // how to clone?
    }
    else {
      vt = hToVDOM(templates[0])
      vt = Array.isArray(vt)? vNode('div', {}, vt): vt // wrap div around array of elems
    }
  }
  else if ( 'object' === typeof templates ) {
    vt = hToVDOM(vToHTML(templates)) // fixes glitch copying templates
  }
  else {
    vt = hToVDOM(templates)
    vt = Array.isArray(vt)? vNode('div', {}, vt): vt // wrap div around array of elems
  }
  if ( contentvars.sel && contentvars.data ) { // vtree
    var tar = vTSel('.template', vt)
    if ( tar.length ) {
      tar[0].children = contentvars && [contentvars] || undefined
    }
    else { console.log('Template selector not found.') }
  }
  else {
    Object.keys(contentvars).forEach(function (sel) {
      var value = contentvars[sel]
      var target = vTSel(sel, vt)
      if ( target.length ) {
        target = target[0]
        if ( 'string' === typeof value || 'number' === typeof value ) {
          target.children = [vNode('span', value)]
        }
        else if ( 'object' === typeof value  ) {
          Object.keys(value).forEach(function (prop) {

vt = templates.reduce(function(prev, next) {
        var ret = hToVDOM(next)
        ret = Array.isArray(ret)? vNode('div', {}, ret): ret // wrap div around array of elems
        var tar = vTSel('.template', ret)
        if ( tar.length ) {
          tar[0].children = prev && prev.children || undefined
        }
        else { console.log('Template selector not found.') }
        return ret
      }, start)
      vt = hToVDOM(vToHTML(vt)) // how to clone?

Object.keys(valprop).forEach(function (mapkey) {
                var subtmpl = hToVDOM(vToHTML(vTSel(mapkey, target)[0])) // how else to clone?
                if ( '_map' === prop ) { target.children = [] }
                valprop[mapkey].forEach(function (cvars) {
                  var mapd
                  if ( 'string' === typeof cvars ) {
                    subtmpl.children = [vNode('span', cvars)]
                    mapd = hToVDOM(vToHTML(subtmpl)) // how to clone?
                  }
                  else if ( 'object' === typeof cvars ) {
                    mapd = vDT(subtmpl, cvars)
                  }
                  switch ( prop ) {
                    case '_mapprepend': target.children.unshift(mapd); break
                    default: target.children.push(mapd); break
                  }
                })
              })

Object.keys(contentvars).forEach(function (sel) {
      var value = contentvars[sel]
      var target = vTSel(sel, vt)
      if ( target.length ) {
        target = target[0]
        if ( 'string' === typeof value || 'number' === typeof value ) {
          target.children = [vNode('span', value)]
        }
        else if ( 'object' === typeof value  ) {
          Object.keys(value).forEach(function (prop) {
            var targetprops = target.data.attrs = target.data.attrs || {}
            var valprop = value[prop]
            if ( '_html' === prop ) {
              target.children = [vNode('span', valprop)]
            }
            else if ( '_append' === prop ) {
              target.children.push(vNode('div', valprop))
            }
            else if ( '_prepend' === prop ) {