Add to cat npm_workspace_clean.sh >> ~/.bashrc.

npm_workspace_clean.sh

function ds_tree {
  for dir in $(find . -maxdepth 1 -type d )
  do 
      du -sh $dir; 
  done
}

function npm_workspace_clean_recursive {
  find . -maxdepth 2 -name "node_modules" -exec rm -rf {} \;
}