*/
  dom.append = function f(parent/*,...*/){
    const a = argsToArray(arguments);
    a.shift();
    for(let i in a) {
      var e = a[i];
      if(isArray(e) || e.forEach){
        e.forEach((x)=>f.call(this, parent,x));
        continue;
      }
      if('string'===typeof e
         || 'number'===typeof e
         || 'boolean'===typeof e) e = this.text(e);
      parent.appendChild(e);
    }
    return parent;
  };

  dom.input = function(type){
    return this.attr(this.create('input'), 'type', type);