zsh-auto-nvm-use is a zsh plugin that automatically loads the node version specified in .nvmrc.
The code is completely taken from the nvm's GitHub repository.
Using Antigen
Bundle zsh-auto-nvm-use in your .zshrc
antigen bundle Sparragus/zsh-auto-nvm-use
As an Oh My ZSH! custom plugin
Clone zsh-auto-nvm-use into your custom plugins repo.
git clone https://github.com/Sparragus/zsh-auto-nvm-use ~/.oh-my-zsh/custom/plugins/zsh-auto-nvm-use
Then load as a plugin in your .zshrc
plugins+=(zsh-auto-nvm-use)