78. selectAt
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## 78. selectAt

Parameter syntax:

    [ 'begin'|'extend'|'end' ]?

begin

  Cancels text or node selection if any. Moves caret to character clicked upon, if such character exists.

extend

  If caret was moved by previous "`selectAt begin`", extends text selection to the character clicked upon.

end

  If caret was moved by previous "`selectAt begin`", does nothing, otherwise selects node clicked upon.

Parameter is absent

  Cancels text or node selection if any. Extends or creates a text selection:

  - The beginning of the new text selection is the beginning of old text selection if any, or caret position otherwise.

  - The end of the new text selection is the character clicked upon.

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