It's probably easier to find tools by searching GitHub instead of SO. It looks like doiuse also comes as a PostCSS plugin so you could have better compile time linter integration with that[0]. There's also a similar plugin for ESLint called eslint-plugin-compat which checks for JS cross browser compatibility[1].
You can also set up automation via WebDriver for cross-browser functional and visual testing if you really want to be sure everything works well. WebDriverIO is good for that[2]. Unless you're going to sink over 1000 hours into the project it's probably not worth it though. It's notoriously tricky to set up correctly if you haven't done it before.
It's probably easier to find tools by searching GitHub instead of SO. It looks like doiuse also comes as a PostCSS plugin so you could have better compile time linter integration with that[0]. There's also a similar plugin for ESLint called eslint-plugin-compat which checks for JS cross browser compatibility[1].
You can also set up automation via WebDriver for cross-browser functional and visual testing if you really want to be sure everything works well. WebDriverIO is good for that[2]. Unless you're going to sink over 1000 hours into the project it's probably not worth it though. It's notoriously tricky to set up correctly if you haven't done it before.
[0] https://github.com/anandthakker/doiuse
[1] https://github.com/amilajack/eslint-plugin-compat
[2] https://webdriver.io/