append(childElement) {
    if (childElement instanceof VirtualElement)
      this.appendChild(childElement)
    else
      this.textContent = childElement
  }
/**
   * This method is used to add an element in form of a Node object
   * or a DOMString (basically means text).
   * @param {VirtualElement | string} childElement
   */
This method is used to add an element in form of a Node object
or a DOMString (basically means text).
@param {VirtualElement | string} childElement
This method is used to add an element in form of a Node object or a DOMString ( basically means text ) . @param { VirtualElement | string } childElement
append(childElement) {
    if (childElement instanceof VirtualElement)
      this.appendChild(childElement)
    else
      this.textContent = childElement
  }
append ( childElement ) { if ( childElement instanceof VirtualElement ) this . appendChild ( childElement ) else this . textContent = childElement }
This method is used to add an element in form of a Node object
 or a DOMString (basically means text).
This method is used to add an element in form of a Node object or a DOMString ( basically means text ) .