Find usage of a word in the project

useof.sh

function useof {
  if [[ -n $1 ]]
  then
    if [[ -n $2 ]]
    then
      local dir=$2;
    else
      local dir=".";
    fi
    grep --recursive --include="*.js" $1 $dir | awk '{ print $1 }' | cut -d':' -f1 | uniq;
  else
    echo 'Usage: useof <term> <dir>[optional]’
  fi
}