setStartBefore method
Sets the start position to be before a node
setStartBefore(refNode )
Parameters
Node refNode
Range starts before refNode
Returns
void
Throws
RangeException
INVALID_NODE_TYPE_ERR: Raised if the root container of refNode is not an Attr, Document, or DocumentFragment node or if refNode is a Document, DocumentFragment, Attr, Entity, or Notation node.
DOMException
INVALID_STATE_ERR: Raised if detach() has already been invoked on this object.
WRONG_DOCUMENT_ERR: Raised if refNode was created from a different document than the one that created this range.
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