nvm lazy-loading trick - it is SO SLOW to load

.zshrc

# Put this in ~/.zshrc (or ~/.bashrc)
# nvm lazy-loading trick - it is SO SLOW to load
# This will delay loading nvm until the first nvm/node/npm command
export NVM_DIR="$HOME/.nvm"
_nvm_lazy_load() {
  unset -f nvm node npm npx
  echo "Lazy loading nvm...\c"
  [ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"  # This loads nvm
  [ -s "$NVM_DIR/bash_completion" ] && \. "$NVM_DIR/bash_completion"  # This loads nvm bash_completion
  echo "done."
  "$@" 
}

nvm() {
  _nvm_lazy_load nvm "$@"
}
node() {
  _nvm_lazy_load node "$@"
}
npm() {
  _nvm_lazy_load npm "$@"
} 
npx() {
  _nvm_lazy_load npx "$@"
}