小编Pio*_*trP的帖子

将项目从 Angular 8 迁移到 10 版本后，我在运行单元测试时收到以下错误：

ERROR in ./node_modules/fs.realpath/index.js
Module not found: Error: Can't resolve 'fs' in 'C:\Users\pp\Desktop\gns3-web-ui\node_modules\fs.realpath'
resolve 'fs' in 'C:\Users\pp\Desktop\gns3-web-ui\node_modules\fs.realpath'
  Parsed request is a module
  using description file: C:\Users\pp\Desktop\gns3-web-ui\node_modules\fs.realpath\package.json (relative path: .)
    Field 'browser' doesn't contain a valid alias configuration
    resolve as module
      looking for modules in C:/Users/pp/Desktop/gns3-web-ui/src
        using description file: C:\Users\pp\Desktop\gns3-web-ui\package.json (relative path: ./src)
          Field 'browser' doesn't contain a valid alias configuration
          using description file: C:\Users\pp\Desktop\gns3-web-ui\package.json (relative path: ./src/fs)
            no extension
              Field 'browser' doesn't contain a valid …

我是 Erlang 的新手。我对下面的代码有问题：

try
    {ok, [Card]} = io:fread("Input card number: ","~d")
    catch
      error:K -> (Card=0);
      exit:K -> (Card=0);
      throw:K -> (Card=0)
    end,

我不知道为什么“尝试”中的“变量”卡不安全。我该怎么办？