and npm before continuing installation. nodejs may be installed using conda or directly from the nodejs我尝试先在我的本地操作系统(Ubuntu16.04)上安装这两个包,然后重新安装jupyterlab,但是没有帮助。奇怪的是,如果我在我的终端上输入nodejs命令,我可以访问一个nodejs REPL。and npm before continuing installation. nodejs
我得到了以下错误。试图搜索并尝试安装extjs、bundler等的宝石仍然存在错误。/home/harsha/.rvm/gems/ruby-2.0.0-p247/gems/execjs-2.0.2/lib/execjs/runtimes.rb:51:in `autodetect': Could not find a JavaScript runtime. See https://github.com/sstephenson/execjs for a list of available runtimes