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So now we know how we can check browser support,

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now with that, the naive thought might be that

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you simply check all these resources and then you need to find a way to make the feature you want to

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use

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work in all possible browsers across all browser versions and here, the clear answer is don't do this. For

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one,

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this will never be entirely possible,

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there are super older versions of Internet Explorer that don't support anything,

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you will never be able to make your application with all its features work there.

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You would just cut so many features that just to support a small fraction of the user base, you pass

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on some awesome features and awesome improvements you could offer to the vast majority of the user base.

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So you definitely have a tradeoff there and you want to be careful regarding your decision.

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Don't build an application for the smallest possible denominator, instead analyze your market, get an

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idea of who your users will be and then build your application

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for those users and use the features or make the features you plan on using work for these users and their

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browsers, not for the global user base.

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Here are some ideas,

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let's say you're building some internal tool or application, so something that runs in the internal

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company network and only employees of the company will be able to use that.

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It's a common use case,

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all companies have their own internal systems which often also are just web applications.

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Now there, the company browser might be clearly defined, maybe as a policy in your company,

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everyone has to use Chrome or Chrome or Firefox or everyone has to use Internet Explorer 11, then

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you know exactly what your user base is, you know exactly for which browser you need to build and you

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certainly don't need to support any other browser or let's say you are building some web page that targets

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tech savvy users,

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some blog about technology,

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some online learning site, anything like that.

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Well there, it's very likely that you have users who are using cutting edge or modern browsers and versions

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of these browsers by default because they're interested in technology,

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they keep their system up-to-date and of course they're using the latest browsers because they want

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to use all these rich web applications,

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then you might not need to support very old legacy browsers because only a very small fraction of your

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users visits your site with these browsers and it might be fine to pass up on these users,

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you can't satisfy everyone,

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maybe you want to show some message to these users who won't be able to use your site

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but that's all.

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Or you're building a site that targets older people or is simply a non-tech savvy audience,

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so then of course these people might be more likely to use slightly older browsers and therefore you

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want to make sure that you support these people and their browsers.

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You might not be able to rely on your audience to use cutting edge browsers and maybe therefore you

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need to be more cautious regarding which features you use and how you test your code on older browsers

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and that's one other thing by the way.

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You of course also want to test your application in a broad variety of browsers, reflecting the browsers

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you would expect your users to have.