How to uninstall Node.js versions downloaded using nvm

To uninstall unwanted node versions downloaded using nvm:

• Open the terminal and run:

W=(16 17);WD=();V=$(nvm ls --no-colors --no-alias | cut -d'v' -f 2 | cut -d' ' -f 1 | tr '\n' ' ');for w in "${W[@]}";do WD+=("$(nvm version "$w" | cut -d'v' -f 2)");done;for v in ${V[@]};do if [[ " ${WD[*]} " =~ $v ]];then echo "Skipping v$v";else echo "Uninstalling v$v";nvm uninstall "$v";fi;done

• Or:

  1. Add the following function to ~/.bash_profile or ~/.bashrc

     function uninstall_node_versions {
       local wantedVersions=('lts/*' node)
       # credit: https://stackoverflow.com/a/1951523
       local wantedDownloadedVersions=()
       local allVersions
       allVersions=$(nvm ls --no-colors --no-alias | cut -d'v' -f 2 | cut -d' ' -f 1 | tr '\n' ' ')
       for wantedVersion in "${wantedVersions[@]}"; do
         wantedDownloadedVersions+=("$(nvm version "${wantedVersion}" | cut -d'v' -f 2)")
       done
       echo "Wanted node versions:" "${wantedVersions[@]}"
       echo "Exact wanted node versions:" "${wantedDownloadedVersions[@]}"
       echo "All installed node versions:" "${allVersions[@]}"
       # shellcheck disable=SC2068
       for version in ${allVersions[@]}; do
         # credit: https://stackoverflow.com/a/15394738
         if [[ " ${wantedDownloadedVersions[*]} " =~ ${version} ]]; then
           echo "Skip uninstalling node ${version} ..."
         else
           echo "Uninstalling node v${version} ..."
           nvm uninstall "${version}"
         fi
       done
     }

  2. Open the terminal and run the function: uninstall_node_versions

  3. Enjoy!