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Cover image for Backdrop Filter effect with CSS

Backdrop Filter effect with CSS

urielbitton profile image Uriel Bitton ・1 min read

Yesterday i came upon a really cool looking effect on a website and tried to reproduce the effect for a new web app i was developing. It had a transparent container create a filter backdrop on the background image behind it and it was really neat.

Here's the effect:
Alt Text

I tried the usual css property filter: blur(10px) but that only blurred the container itself and not the background behind the element. After some research i found a super simple one line css property to do just that. Since then i've been using it in every app or design i created (where appropriate).

here it is:

.container {
    backdrop-filter: blur(10px);
}

I had no idea that CSS property existed!

Now add a background image behind your container and watch the magic. Pretty cool right?

Note: Some browsers may not support the property. But the major ones like chrome, firefox and edge do.

Try it out and let me know what you think. Till next time!

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urielbitton profile

Uriel Bitton

@urielbitton

Hi i'm an avid web and app developer in search for creativity and always going after new ideas. Developer of Reactor JS

Discussion

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For Safari:

.container {
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}
 

Good thought! here is a point to note that currently backdrop-filter is an experimental CSS3 property that have only support in Safari. However, caniuse.com indicates that it has support on Chrome 76 and higher but I don't see any changes as I'm using Chrome 79 at present.

Sadly Firefox doesn't support it at all, but it has a mysterious property -moz-element(#target) which can be used as a fallback with a combination of ::before & ::after elements for Gecko based browsers. Agreed with @rk_jsorbit . as well. :D

Thank you for sharing the tip. I hope you'll keep sharing more useful thoughts. Have a nice one! ;)

 

Thanks for the sharing! The feature can be enabled in Firefox by setting the layout.css.backdrop-filter.enabled to true in about:config. For more info check out the caniuse.com/#search=backdrop-filter

 

Thanks for the reply. I've already enabled it in Firefox 79 but still no luck, I don't see the backdrop, only the fallback of background:rgba(0,0,0,0.1). Here is a snapshot:

about:config
Backdrop filter in Firefox

I updated Chrome to v84 and did the same test and it works!

Backdrop filter in Chrome

Not sure what's wrong in Firefox.

I think after some research that firefox doesn't have compatility unfortunately.

 
 

thanks for sharing man! Chrome works perfectly fine indeed, and i beleive all chromium based browsers too.

 

Hmm... so you're using saturate(180%) in the backdrop-filter to cancel out the background color with opacity of your fallback...? There's a cleaner solution. You can check if the browser supports backdrop-filter and provide different css code, like with media queries:

@supports (-webkit-backdrop-filter: none) or (backdrop-filter: none) {
  .blurred-container {
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
  }
}

/* slightly transparent fallback for Firefox (not supporting backdrop-filter) */
@supports not ((-webkit-backdrop-filter: none) or (backdrop-filter: none)) {
  .blurred-container {
    background-color: rgba(255, 255, 255, .8);
  }
}
 

Here's an overview of the browser support for backdrop-filter. Always check this when using more "special" css props :)
caniuse.com/#search=backdrop-filter

Definitely use the fallback option described by Rohit when using backdrop-filter

 

Still pretty good coverage though, around 75%

 

True, but in general (not just css) there are some funky edge-cases in browsers out there so checking the availability never hurts. For example Safari doesn't support .ogg files - so if you have any audio on your page you'd better use mp3. Oof.

 
 

Wow, that's awesome. I had no idea till now that this kind of trick exist. Thx for sharing

 
 

thank-you-from-my-heart-my-Brother

 
 

Really nice effect. Definitely gonna use this one in a project.

 
 
 

Awesome man ill add it in thanks a lot!

 

Thanks for sharing Uriel and Rohit

 

youre most welcome Charlie!