Run npm script from within vim with popup_menu

run_npm_popupmenu.vim

func NpmSelected(id, result)
       let cmd = "npm run " . b:ks[a:result - 1]
	exec "terminal " . cmd
endfunc

function! RunNpm()
        if filereadable("./package.json")
                let st = readfile("./package.json")
                let package = json_decode(join(st, " "))
                if has_key(package, "scripts")
                        let b:ks = keys(package.scripts)
                        call popup_menu(b:ks, #{callback: 'NpmSelected'})
                endif
        else
                echo "No package.json found"
        endif
endfunction