Bootstrap 4, How do I center-align a button?

In Bootstrap 4 one should use the text-center class to align inline-blocks. NOTE: text-align:center; defined in a custom class you apply to your parent element will work regardless of the Bootstrap version you are using. And that’s exactly what .text-center applies. Expand snippet If the content to be centered is block or flex (not inline-), … Read more

CSS transition shorthand with multiple properties?

Syntax: Note that the duration must come before the delay, if the latter is specified. Individual transitions combined in shorthand declarations: Or just transition them all: Here is a straightforward example. Here is another one with the delay property. Edit: previously listed here were the compatibilities and known issues regarding transition. Removed for readability. Bottom-line: … Read more

CSS text-align: center; is not centering things

I assume you want all the items next to each other, and the whole thing to be centered horizontally. li elements are display: block by default, taking up all the horizontal space. Add once you’ve done that, you probably want to get rid of the list’s bullets:

Dynamically change color to lighter or darker by percentage CSS

All modern browsers have had 100% filter support since January 2020. Even UC Browser for Android (instead of Chrome, on the $80 phones) supports it. Additionally, you can control this dynamically with CSS variables, which have been supported by most browsers since October 2017 (excluding QQ): Not my project, but one that’s great to look at for a real-world example of how … Read more

Play multiple CSS animations at the same time

TL;DR With a comma, you can specify multiple animations each with their own properties as stated in the CriticalError answer below. Example: Original answer There are two issues here: #1 The second line replaces the first one. So, has no effect. #2 Both keyframes applies on the same property transform As an alternative you could to … Read more

Aligning two divs side-by-side

If you wrapped your divs, like this: You could use this styling: This is a slightly different look though, so I’m not sure it’s what you’re after. This would center all 800px as a unit, not the 600px centered with the 200px on the left side. The basic approach is your sidebar floats left, but … Read more

How to apply a CSS filter to a background image

Check out this pen. You will have to use two different containers, one for the background image and the other for your content. In the example, I have created two containers, .background-image and .content. Both of them are placed with position: fixed and left: 0; right: 0;. The difference in displaying them comes from the z-index values which have been set differently for the … Read more

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