Easy-mode nvm and cd

useNvmIfPresent() {
  [[ $PWD == $PREV_PWD ]] && return
  PREV_PWD=$PWD
  [[ -f ".nvmrc" ]] && nvm use
}
PROMPT_COMMAND=${PROMPT_COMMAND:+"$PROMPT_COMMAND; "}'useNvmIfPresent'

This script runs nvm use anytime you cd to a directory with a .nvmrc file. With this, you don't need to remember to run nvm use when switching between directories. It leverages the built-in PROMPT_COMMAND variable in bash, to run the useNvmIfPresent function before each PS1 prompt.

To use it, just throw the script above into your .bashrc, .bash_profile, or whatever system you're using to automatically source scripts on shell startup.