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I typically use Modernizr to feature-detect for CSS features like flex-box support and fall back to older methods if unsupported:
.mz-flexbox {
// use flex
}
.mz-noflexbox {
// use floats
}
How would one accomplish something similar with styled-components with something like Modernizr where classes are added to the <html> element to indicate feature support?
My only thought at this point is importing components in my "App.js" and using injectGlobal to target them:
import MyComponent from './components/my-component';
injectGlobal`
.mz-flexbox {
${MyComponent} {
// use flex
}
}
`;
It appears @supports would be a sweet solution, but I do care about Internet Explorer, so this is not a solution for this project.
Lastly, I'm not sure if this is a good way to do this, but would something like this work for feature detection? I'm not 100% on what gets compiled with styled-components and what can be calculated at run-time:
styled.div`
${window.Modernizr.flexbox && css`
display: flex;
align-items: center;
`}
`;
Will that work for detection at run-time?
842
You can just query the classList of the hmtl tag.
const modern = document.querySelector('html').classList
Then just check to see if the feature class you're looking for is in that list. For example:
if (modern.contains('noflexbox') {
// Adjust as per usual
}
It's all just JavaScript :D
A better method, however, would be to use the Modernizr API directly, rather than relying on the presence of classes. So your code would look more like:
if(Modernizr.someFeature) { ... }
Check out the modernizr docs
RE: your last example - yep, that'll work, assuming you're bundling modernizr as a dependency with the rest of your javascript. There are other approaches in the docs for setting up feature tests, which should help reduce condition duplication in your styled strings
71
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