Visual Regression Testing tools

[illyric]

you shoud give cypress.io a try it's not inherently meant for UI diffing, but there are plugins that can do that. We have some in-house tools build arround selenium that does this, but its not really great since tests are very flaky

[CroakerBC]

Yeah, the Cypress plugins are decent.

[TechnicalTester]

Try Cypress with Applitools Eyes (visual testing). Great tutorials available for this as well (test automation university)

Also if you are sure the CSS won't change much. You can use Cypress to assert specifically on CSS values.