Switch node versions without nvm

.zshrc

# node-switch alias
alias ns=$HOME/scripts/node-switch.sh

# switch node version based on .nvmrc
default_node_version=12.13.1
chpwd() {
  if [[ -f .nvmrc && -r .nvmrc ]]; then
    ns switch "$(< .nvmrc)"
  elif [[ $(node --version) != v$default_node_version ]]; then
    ns switch $default_node_version
  fi
}