Property 'toBeInTheDocument' does not exist on type 'Matchers<any>'
Most of the solutions above seems to tackle Babel or ESLint. If you have this problem with tslint and pure Typescript it's enough to add:@testing-library/jest-dom to your types
So that in your tsconfig.json:
"types": ["node", "jest", "@testing-library/jest-dom"],Please also bare in mind that you should include that library into Jest. Rather than import it in every file it is better to do it inside the config file:
setupFilesAfterEnv: [ "<rootDir>/support/setupTests.js"],and then in the file setupTests.js:
import '@testing-library/jest-dom/extend-expect'or even swap to require() if using directly TypeScript.