How to Update Node.js and Ionic

Update Node Using a Package Manager

npm install npm@latest -g
sudo npm cache clean -f
sudo npm install -g n
sudo n stable

Update Ionic

sudo npm install -g ionic@latest

Start Android Virtual Device (AVD) emulator from the command line

The command-line syntax for starting an Android Virtual Device (AVD) emulator from a command prompt:

~/Library/Android/sdk/tools/emulator -avd avd_name -netdelay none -netspeed full

Please replace "avd_name" with the device name.