The result is a Number, which is TRUE if there is a mapping that contains {what} in somewhere in the rhs (what it is mapped to) and this mapping exists in one of the modes indicated by {mode}. When {abbr} is there and it is |TRUE| use abbreviations instead of mappings. Don't forget to specify Insert and/or Command-line mode. Both the global mappings and the mappings local to the current buffer are checked for a match. If no matching mapping is found FALSE is returned. The following characters are recognized in {mode}: n Normal mode v Visual and Select mode x Visual mode s Select mode o Operator-pending mode i Insert mode l Language-Argument ("r", "f", "t", etc.) c Command-line mode When {mode} is omitted, "nvo" is used. This function is useful to check if a mapping already exists to a function in a Vim script. Example: :if !hasmapto('\ABCdoit') : map d \ABCdoit :endif This installs the mapping to "\ABCdoit" only if there isn't already a mapping to "\ABCdoit". Can also be used as a |method|: GetRHS()->hasmapto()