Add local node_modules/.bin to the PATH dynamically

.zshrc

function add_node_modules_bin() {
    export _OLD_NODE_PATH="$PATH"

    if [[ -d "./node_modules/.bin" ]]; then
        export PATH="$PWD/node_modules/.bin:$PATH"
    fi
}

function remove_node_modules_bin() {
    if [[ -n "$_OLD_NODE_PATH" ]]; then
        export PATH="$_OLD_NODE_PATH"
        unset _OLD_NODE_PATH
    fi
}

# Hook into directory changes
add-zsh-hook chpwd add_node_modules_bin

# Hook that runs when shell starts (new tab/window)
precmd_functions+=(add_node_modules_bin)