运行npm的Node-js SyntaxError

Question

每当我运行任何'npm‘命令时，我都会得到这个错误。

      let notifier = require('update-notifier')({pkg})
      ^^^

SyntaxError: Block-scoped declarations (let, const, function, class) not yet supported outside strict mode
    at exports.runInThisContext (vm.js:53:16)
    at Module._compile (module.js:374:25)
    at Object.Module._extensions..js (module.js:417:10)
    at Module.load (module.js:344:32)
    at Function.Module._load (module.js:301:12)
    at Function.Module.runMain (module.js:442:10)
    at startup (node.js:136:18)
    at node.js:966:3

我的节点版本

node -v
> v4.2.6

我相信最新的是14，但我也不能更新它。

我试过跑步

curl -sL https://deb.nodesource.com/setup_12.x | sudo -E bash -

然后,

sudo apt-get install -y nodejs
>Reading package lists... Done
Building dependency tree       
Reading state information... Done
nodejs is already the newest version (4.2.6~dfsg-1ubuntu4.2).
0 upgraded, 0 newly installed, 0 to remove and 50 not upgraded.

Answer 1

你不能在严格模式下使用let，const。所以要么使用严格模式，要么使用"var“而不是"let”。