cross-env: not found

https://qiita.com/TakahiRoyte/items/c152ad8baa191ed1f8ae

解決

npm install --save cross-env

https://qiita.com/rema424/items/9306e96307d0814dc57b

[vagrant@localhost projectname]$ yarn dev
yarn run v1.22.4
$ cross-env NODE_ENV=development nuxt-ts
events.js:170
      throw er; // Unhandled 'error' event
      ^

Error: spawn nuxt-ts ENOENT
    at Process.ChildProcess._handle.onexit (internal/child_process.js:247:19)
    at onErrorNT (internal/child_process.js:429:16)
    at processTicksAndRejections (internal/process/task_queues.js:81:17)
    at process.runNextTicks [as _tickCallback] (internal/process/task_queues.js:56:3)
    at Function.Module.runMain (internal/modules/cjs/loader.js:880:11)
    at internal/main/run_main_module.js:21:11
Emitted 'error' event at:
    at Process.ChildProcess._handle.onexit (internal/child_process.js:253:12)
    at onErrorNT (internal/child_process.js:429:16)
    [... lines matching original stack trace ...]
    at internal/main/run_main_module.js:21:11
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.