IText
The Text interface represents the textual content of Element or Attr.
If an element has no markup within its content, it has a single child
implementing Text that contains the element's text. However, if the
element contains markup, it is parsed into information items and Text
nodes that form its children.
Gets a string containing the text of all Text nodes logically adjacent
to this Node, concatenated in document order.
Breaks the node into two nodes at a specified offset.