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A am about to create new version of niche web app. Most of our audience are big, corporate clients. Some of them are using outdated web browsers.
What kind of tools are you using that could help ensure better browser cross compatibility?
Unfortunately some part of web app might be heavy dependent on JS/DOM manipulations.
What I am looking for:
* Hints like: 'this CSS selector is not supported on X' or 'method document.getXYZ is not available in Y' or 'you can not nest <some-element> inside <other-element> in Z'
* Automated test that interact with real browser.
* Libraries / frameworks that support old browsers
* Web browser plugin that could spot problems
* ???
At the end of the day I will be testing if app is working manually on some of old browsers but I am looking into a way to catch problems as fast as it is possible and having to do less manual labor.
What are your thoughts?