Hello!
Correct transformation need to be configured.

 ...
 transform: {
    '^.+\\.jsx?$': require.resolve('babel-jest'),
 },
 ...

and ensure it is transformed

  transformIgnorePatterns: ['node_modules/(?!(quasar|quasar/*|@quasar|@quasar/*))'],

more info here: https://stackoverflow.com/questions/63481304/quasar-extras-mdi-v4-jest-unit-testing-failing-on-unexpected-token-export
please upvote if it helped you, thanks

Thank you @Fancellu, you helped me.
Here is quick DEMO https://codepen.io/luckylooke/pen/WNQQLym

In current version you can use masks https://quasar.dev/vue-components/input#Mask but anyway I did not find the way to set custom group of allowed characters… lets say I want to input to accept only alfanumeric and dash “-” characters… I cannot achieve this via masks.