Zsh function to change nodeJS version per project (directory) using NVM

nvm_change_by_dir.sh

# Add at the end of your .zshrc file
# After every command `cd`, it checks if there is a ".nvmrc" file in the current directory and if it exists it changes the version of nodejs automatically
# Create a .nvmrc file like this: `echo "v16.15.0" > .nvmrc` in the folder you want to use the specific version of nodejs

function nvm_change_by_dir() {
  emulate -L zsh
  if [ -f ".nvmrc" ]; then
    NODEJS_VERSION=$(cat .nvmrc);
    COMMAND="nvm use"
    
    if [ $(node --version) != $NODEJS_VERSION ]; then
      eval "$COMMAND";
    fi
  fi
}
# hook function
chpwd_functions=(${chpwd_functions[@]} "nvm_change_by_dir")
# run command when open a new shell session
nvm_change_by_dir