direnv for Node.js

.direnvrc

# Append in ~/.direnvrc below:

use_node() {
  layout node
  local node_version=$1

  if [ "$node_version" == "package.json" ]; then
    # Requires jq: `brew install jq`
    if ! command -v jq &> /dev/null; then
      echo -e "\033[0;31mjq is not installed. Please type 'brew install jq'.\033[0m"
      return 1
    fi
    node_version=`jq --raw-output .engines.node package.json | tr -d "<=> "`
  fi

  # Load node version from n
  local node_path=${NODE_DIR:-/usr/local/n/versions/node}

  if [ -x "$node_path/$node_version/bin/node" ]; then
    PATH_add $node_path/$node_version/bin
  elif [ -x "$node_path/v$node_version/bin/node" ]; then
    # Support nvm users
    PATH_add $node_path/v$node_version/bin
  else
    echo -e "\033[0;31mNode.js version $node_version is not installed. Plase type 'sudo n install $node_version'\033[0m"
  fi

  export NODE_PATH=./node_modules
}

.envrc

# Use node version specified in package.json like below:
#   "engines": {
#     "node": ">=20.15.1"
#   },
use node package.json

# ...or use specific version
use node 22.11.0