Hello HN,<p>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.<p>What kind of tools are you using that could help ensure better browser cross compatibility?<p>Unfortunately some part of web app might be heavy dependent on JS/DOM manipulations.<p>What I am looking for:<p>* 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'<p>* Automated test that interact with real browser.<p>* Libraries / frameworks that support old browsers<p>* Web browser plugin that could spot problems<p>* ???<p>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.<p>What are your thoughts?