Update

install_fnm.sh

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+#!/bin/bash
+
+# Save the original working directory
+ORIGINAL_DIR="$(pwd)"
+
+# Function to detect the operating system
+detect_os() {
+    if [[ "$OSTYPE" == "darwin"* ]]; then
+        echo "macos"
+    elif [[ -f /etc/os-release ]]; then
+        . /etc/os-release
+        echo "$ID"
+    else
+        echo "unknown"
+    fi
+}
+
+# Install fnm (Fast Node Manager) if it is not already installed
+if command -v fnm &> /dev/null; then
+    echo -e "fnm is already installed\n"
+    fnm --version
+else
+    echo -e "Installing fnm (Fast Node Manager)\n"
+    
+    os=$(detect_os)
+    
+    case $os in
+        macos)
+            # Try homebrew first on macOS
+            if command -v brew &> /dev/null; then
+                echo "Installing fnm via Homebrew..."
+                brew install fnm
+            else
+                echo "Installing fnm via official installer..."
+                curl -fsSL https://fnm.vercel.app/install | bash
+            fi
+            ;;
+        ubuntu|debian)
+            # Use the official installer for Linux
+            echo "Installing fnm via official installer..."
+            curl -fsSL https://fnm.vercel.app/install | bash
+            ;;
+        fedora|centos|rhel)
+            # Use the official installer for RHEL-based distros
+            echo "Installing fnm via official installer..."
+            curl -fsSL https://fnm.vercel.app/install | bash
+            ;;
+        arch|manjaro)
+            # Use the official installer for Arch-based distros
+            echo "Installing fnm via official installer..."
+            curl -fsSL https://fnm.vercel.app/install | bash
+            ;;
+        *)
+            echo "Using official installer for unknown OS..."
+            curl -fsSL https://fnm.vercel.app/install | bash
+            ;;
+    esac
+
+    # Load fnm for the remainder of this script
+    export PATH="$HOME/.local/share/fnm:$PATH"
+    eval "$(fnm env --use-on-cd)"
+fi
+
+# OPTIONAL: Install the latest LTS version of Node.js
+# Uncomment the following lines if you would like to automatically install it
+# echo "Installing latest LTS Node.js version..."
+# fnm install --lts
+# fnm use lts-latest
+# fnm default lts-latest
+
+# Apply the fnm zsh configuration patch (downloads zshrc/fnm.zsh to ~/.config/zshrc/fnm.zsh)
+curl -s https://git.miomio.moe/mio/easyzsh/raw/branch/master/patch.sh | bash -s fnm
+
+echo -e "\nfnm installation completed!"
+echo -e "To start using fnm, restart your terminal or run: source ~/.zshrc"
+echo -e "\nUseful fnm commands:"
+echo -e "  fnm install --lts          # Install latest LTS Node.js"
+echo -e "  fnm install 18              # Install Node.js v18"
+echo -e "  fnm use 18                  # Use Node.js v18"
+echo -e "  fnm default 18              # Set Node.js v18 as default"
+echo -e "  fnm list                    # List installed versions"
+echo -e "  fnm list-remote             # List available versions"
+
+# Restore original working directory
+cd "$ORIGINAL_DIR" 

zshrc/fnm.zsh

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+# fnm (Fast Node Manager) configuration
+# https://github.com/Schniz/fnm
+
+# Check if fnm is installed
+if command -v fnm &> /dev/null; then
+    # Set fnm environment variables and enable auto-switching on directory change
+    eval "$(fnm env --use-on-cd --shell zsh)"
+    
+    # Enable fnm completions for zsh
+    eval "$(fnm completions --shell zsh)"
+    
+    # Optional: Auto-install Node.js version if .node-version exists but version not installed
+    # Uncomment the following lines to enable this feature:
+    # autoload -U add-zsh-hook
+    # _fnm_autoinstall() {
+    #     if [[ -f .node-version || -f .nvmrc ]]; then
+    #         local version
+    #         if [[ -f .node-version ]]; then
+    #             version="$(cat .node-version)"
+    #         elif [[ -f .nvmrc ]]; then
+    #             version="$(cat .nvmrc)"
+    #         fi
+    #         if ! fnm list | grep -q "$version"; then
+    #             echo "Auto-installing Node.js $version..."
+    #             fnm install "$version"
+    #         fi
+    #     fi
+    # }
+    # add-zsh-hook chpwd _fnm_autoinstall
+    # _fnm_autoinstall  # Run on shell startup
+fi