"ResizeObserver is not defined" error when running Jest

[joel-jaimon]

Getting this error when running Jest with v8.11.3.

[kkyusufk]

@joel-jaimon can you add more context around the issue? Maybe a steps to reproduce.

[chaitanyadeorukhkar]

You can mock it with this:

global.ResizeObserver = jest.fn().mockImplementation(() => ({
  observe: jest.fn(),
  unobserve: jest.fn(),
  disconnect: jest.fn(),
}));

[joel-jaimon]

I had to mock it in the end, but I just wanted to check with you folks if this can be resolved from the lib itself.

[chaitanyadeorukhkar]

Not sure if we'll be able to resolve it on lib end since it would always be client's jest that doesn't have any definitions for ResizeObserver. I can add this to the FAQ section though

[prabhasjoshi]

I was also facing the same error - so i setup the mocking for it in my projects initJest.js file

[chaitanyadeorukhkar]

Added in FAQ #1412. Closing this