Pre commit hook to grep through modified files for forbidden words and reject if found. A better hook would grunt your repo with things like jshint and follow a set of static analysis project standards.

pre-commit

#!/bin/bash

# Grep through modified files for forbidden words and reject commit if found

FILE_PATTERN='\.(js)(\..+)?$'     # Separate more file types with pipes here
FORBIDDEN=( debugger )            # Separate more forbidden strings with spaces here

for i in "${FORBIDDEN[@]}"
do
  git diff --cached --name-only | \
        grep -E $FILE_PATTERN | \
        GREP_COLOR='4;5;37;41' xargs grep --color --with-filename -n $i && \
        echo 'COMMIT REJECTED Found'  $i 'references. Please remove them before commiting' && exit 1
done
 
exit 0