It takes as much energy to wish as it does to plan. — Eleanor Roosevelt
Yes, you can, and it doesn't really matter in what order. A CSS preprocessor is not required. It works in regular CSS.
This works:
@supports(--a: b) {
@media (min-width: 1px) {
body {
background: red;
}
}
}And so does this, the reverse nesting of the above:
@media (min-width: 1px) {
@supports(--a: b) {
body {
background: green;
}
}
}
Here’s a neat trick from Andy Bell where he uses CSS Custom Properties to check if a particular CSS feature is supported by using JavaScript.
Basically, he's using the ability CSS has to check for browser support on a particular property, setting a custom property that returns a value of either 0 or 1 (Boolean!) and then informing the JavaScript to execute based on that value.… Read article
CSS has a neat feature that allows us to test if the browser supports a particular property or property:value combination before applying a block of styles — like how a @media query matches when, say, the width of the browser window is narrower than some specified size and then the CSS within it takes effect. In the same spirit, the CSS inside this feature will take effect when the property:value pair being tested is supported in the current browser. That … Read article
CSS is designed in a way that allows for relatively seamless addition of new features. Since the dawn of the language, specifications have required browsers to gracefully ignore any properties, values, selectors, or at-rules they do not support. Consequently, in most cases, it is possible to successfully use a newer technology without causing any issues in older browsers.
Consider the relatively new caret-color property (it changes the color of the cursor in inputs). Its support is still low but that … Read article
In early 2017, I presented a couple of workshops on the topic of CSS feature detection, titled CSS Feature Detection in 2017.
A friend of mine, Justin Slack from New Media Labs, recently sent me a link to the phenomenal Feature Query Manager extension (available for both Chrome and Firefox), by Nigerian developer Ire Aderinokun. This seemed to be a perfect addition to my workshop material on the subject.
However, upon returning to the material, I … Read article