56. overwriteMode

Parameter syntax:

'toggle'|'on'|'off'|isOn'

Allows to switch from Insert Mode to Overwrite Mode and vice versa.

Insert Mode

Typing a character inserts it at caret position.

Overwrite Mode

Typing a character replaces the character found at caret position by the typed character. If the caret is positioned at the very end of a text (or comment or processing-instruction) node, then typed characters are simply inserted there.

Options:

toggle

Switch from Insert Mode to Overwrite Mode and vice versa.

on

Ensures that Overwrite Mode is turned on.

off

Ensures that Overwrite Mode is turned off.

isOn

Returns Boolean.TRUE if Overwrite Mode is turned on; otherwise returns Boolean.FALSE.

Whatever the option used, this command returns a Boolean indicating whether Overwrite Mode is turned on.