sdkman-lazy.zsh

# sdkman recommands settings SDKMAN_DIR and sourcing sdkman-init.sh
# this can really slow down shell startup, so here's my attempt to lazy-load sdk()
# 
# This snippet lives in my ~/.profile but generally could live in any zsh-related startup file.
# 
# the logic of this custom sdk is kind of odd, but it basically checks if the current
# definition of sdk() is too short (less than 10 lines). If so, it tries to source
# the init script and then pass through all the arguments to the real sdk function.

export SDKMAN_DIR="$HOME/.sdkman"

# too slow!
# [[ -s "$SDKMAN_DIR/bin/sdkman-init.sh" ]] && source "$SDKMAN_DIR/bin/sdkman-init.sh"

# do this instead:
sdk () {
    # "metaprogramming" lol - source init if sdk currently looks like this sdk function
    if [[ "$(which sdk | wc -l)" -le 10 ]]; then
        unset -f sdk
        source "$SDKMAN_DIR/bin/sdkman-init.sh"
    fi
    sdk "$@"
}

Except for nvm, you can't use global installed packages like npm, npx and so on before actually (lazy) load nvm calling it once in the command line.

You can't call npx directly:

npx

You'll need to do something like this instead

nvm --version
npx

For this specific case I recommend zsh-nvm