vue error code ETIMEDOUT,network tunneling socket could not be established, cause=connect ETIMEDOUT

异常：

network tunneling socket could not be established, cause=connect ETIMEDOUT 16.85.88.10:8080

C:\Users\zhiqi.shao>npm show vue-cli
npm ERR! code ECONNRESET
npm ERR! network tunneling socket could not be established, cause=connect ETIMEDOUT 16.85.88.10:8080
npm ERR! network This is a problem related to network connectivity.
npm ERR! network In most cases you are behind a proxy or have bad network settings.
npm ERR! network
npm ERR! network If you are behind a proxy, please make sure that the
npm ERR! network 'proxy' config is set properly.  See: 'npm help config'


   ╭───────────────────────────────────────╮
   │                                       │
   │   Update available 6.14.11 → 7.9.0    │
   │      Run npm i -g npm to update       │
   │                                       │
   ╰───────────────────────────────────────╯


npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\zhiqi.shao\AppData\Roaming\npm-cache\_logs\2021-04-11T04_43_37_300Z-debug.log

C:\Users\zhiqi.shao> npm i -g npm
npm ERR! code ETIMEDOUT
npm ERR! errno ETIMEDOUT
npm ERR! network request to https://registry.npm.taobao.org/npm failed, reason: connect ETIMEDOUT 16.85.88.10:8080
npm ERR! network This is a problem related to network connectivity.
npm ERR! network In most cases you are behind a proxy or have bad network settings.
npm ERR! network
npm ERR! network If you are behind a proxy, please make sure that the
npm ERR! network 'proxy' config is set properly.  See: 'npm help config'

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\zhiqi.shao\AppData\Roaming\npm-cache\_logs\2021-04-11T04_46_27_360Z-debug.log

解决办法：之前是不是配置过代理。。。。

C:\Users\zhiqi.shao>npm config delete proxy
C:\Users\zhiqi.shao>npm config set https-proxy
C:\Users\zhiqi.shao>npm show vue-cli
npm WARN invalid config https-proxy=""
npm WARN invalid config Must be a full url with 'http://'
npm WARN invalid config https-proxy=""
npm WARN invalid config Must be a full url with 'http://'
{
  name: 'vue-cli',
  description: 'A simple CLI for scaffolding Vue.js projects.',
  'dist-tags': { latest: '2.9.6' },
  maintainers: [ 'rem <shinjisays@gmail.com>', 'zigomir <zigomir@gmail.com>' ],
  time: {
    modified: '2019-07-16T07:17:20.000Z',
    created: '2015-12-26T23:12:03.219Z',
    '2.9.6': '2018-06-05T04:50:34.422Z',
    '2.9.5': '2018-05-31T18:01:33.799Z',
    '2.9.4': '2018-05-30T18:09:52.110Z',
    '2.9.3': '2018-02-05T03:36:33.265Z',
    '2.9.2': '2017-11-30T14:51:24.840Z',
    '2.9.1': '2017-10-02T03:08:59.537Z',
    '2.9.0': '2017-10-02T03:04:23.436Z',
    '2.8.2': '2017-05-16T01:41:23.480Z',
    '2.8.1': '2017-01-30T14:24:47.477Z',
    '2.8.0': '2017-01-18T15:44:34.224Z',
    '2.7.0': '2017-01-02T20:02:21.263Z',
    '2.6.0': '2016-12-20T19:06:11.576Z',
    '2.5.1': '2016-11-16T03:11:41.414Z',
    '2.5.0': '2016-11-05T19:39:11.395Z',
    '2.4.0': '2016-09-28T23:06:17.955Z',
    '2.3.1': '2016-09-06T01:58:16.171Z',
    '2.2.0': '2016-08-16T19:28:47.405Z',
    '2.1.1': '2016-07-27T02:17:46.419Z',
    '2.1.0': '2016-05-09T16:11:30.773Z',
    '2.0.4': '2016-05-04T16:53:14.409Z',
    '2.0.3': '2016-04-27T05:21:14.653Z',
    '2.0.2': '2016-04-09T07:11:49.967Z',
    '2.0.1': '2016-04-09T06:38:15.002Z',
    '2.0.0': '2016-04-09T01:22:06.801Z',
    '1.4.0': '2016-01-26T17:09:44.727Z',
    '1.3.0': '2016-01-14T22:33:11.940Z',
    '1.2.0': '2016-01-13T18:04:20.592Z',
    '1.1.3': '2016-01-11T20:32:44.292Z',
    '1.1.2': '2016-01-11T16:08:43.466Z',
    '1.1.1': '2016-01-04T03:35:23.685Z',
    '1.1.0': '2015-12-29T18:28:33.057Z',
    '1.0.3': '2015-12-28T21:01:07.092Z',
    '1.0.2': '2015-12-28T16:52:31.086Z',
    '1.0.1': '2015-12-27T01:13:20.639Z',