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Another good place to look for fine-grained support information is the page for each CSS property on MDN. If you want to check whether a feature you are using is supported by browsers then you can look at the Can I Use website. This approach is the basic idea behind progressive enhancement, using this feature of the platform which enables the safe use of new things in browsers which don’t understand them. Use the feature, make sure that when that feature is not available the experience is still good, and that’s it. For some CSS, used purely as an enhancement, that is all you need to do. This design principle of CSS means that you can cheerfully use new features, in the knowledge that nothing bad will happen to a browser that doesn’t have support. If the browser does not understand that line of CSS, it just skips it and gets on with the next thing it does understand. This is the same whether you use a feature that is unsupported, or make up a feature and try to use it. If you use a CSS property or value that a browser does not understand, the browser will ignore it. It’s helpful to understand what you are dealing with when you see a difference between browsers, so let’s have a look at each of these issues in turn. This one is becoming more common a situation in which a browser supports a feature - but only in one context. Such an issue is what we tend to refer to as a “browser bug” because the end result is inconsistent behavior. The second is when the browser claims to support the feature, but does so in a way that is different to the way that other browsers support the feature. The first issue (and easiest to deal with) is when a browser does not support the feature at all. There are three issues that we face with regard to browser support:
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If you are a professional web developer then your job is to deal with that fact. While implementation happens these days most often behind a flag in the browser or available only in a Nightly or preview version, once a browser has a complete feature, it is likely to switch it on for everyone even if no other browser yet has support.Īll this means that - as much as we might like it - we will never exist in a world where features are magically available on every desktop and phone simultaneously. Therefore, feature development is an iterative process and requires that browsers implement these specifications in development. Quite often it is only when an experimental implementation happens, that all the finer details of the specification can be worked out. It is not the case that new features for CSS are designed by the CSS Working Group, and a complete spec handed down to browser vendors with an instruction to implement it. There is also the manner in which new features get into browsers in the first place.
#Get css file back that prepros wrote over update
This means that a Chromium-based browser such as Vivaldi, might be a few versions behind Google Chrome.Īnd, of course, users do not always quickly update their browsers, although that situation has improved in recent years with most browsers silently upgrading themselves. Why Do We Have These Differences?Įven in a world where the majority of browsers are Chromium-based, those browsers are not all running the same version of Chromium as Google Chrome. I’m going to show you some ways to deal with them, and also look at things which might be coming soon which can help. That said, things are far better now than in the past, and in this article, I’m going to have a look at the different types of browser support issues we might run into. This means that dealing with old browsers - or browsers which do not support something that we want to use - is part of the job of a web developer.
We will never live in a world where everyone viewing our sites has an identical browser and browser version, just as we will never live in a world where everyone has the same size screen and resolution.
In this article, Rachel Andrew details the different types of browser support issues, and shows how CSS is evolving to make it easier to deal with them. It can be frustrating when you want to use a feature and discover that it is not supported or behaves differently across browsers.