how ignore typescript errors with @ts-ignore?

All answers here suggest disabling the whole eslint rule which is not very practical, a better solution will be to ignore the eslint error at that specific location like this:

// eslint-disable-next-line @typescript-eslint/ban-ts-comment
// @ts-ignore

You can stop using @ts-ignore

Or you can disable the eslint rule. Add that in your eslint config (.eslintrc or equivalent)

...
  "rules": {
    "@typescript-eslint/ban-ts-ignore": "off"
  }
...

EDIT: If you are using @typescript-eslint/eslint-plugin version 2.18 or higher, the rule is called ban-ts-comment and you need to add

"@typescript-eslint/ban-ts-comment": "off"

instead. Here is the changelog

I recommend allowing @ts-ignore with an enforced description. This can be achieved by the following config in .eslintrc.js. Link to documentation

rules: {
  '@typescript-eslint/ban-ts-comment': [
    'error',
    {'ts-ignore': 'allow-with-description'},
  ],
},

Posting as an answer instead of comment to the accepted answer because of my lack of reputation. I still want to contribute and possibly help someone out.

The rule for me was

@typescript-eslint/ban-ts-comment

not ban-ts-ignore