CSS Color (Colour) Concatenation
So I figured this out by mistake and had my mind blow when I saw it. Haha I have been programming with CSS for 7 years and I didn't know this!
I was adjusting default bootstrap checkbox colours and I accidentally typed an additional colour without clearing and it ended up splitting the colours. Looks quite cool! Check how the border splits half half on each side with the colours.
.form-check-input:checked {
background-color: #000;
border-color: #000#FFF;
}
Bootstrap Mobile Optimisation
The best CSS library I have ever used for mobile Optimisation!
After full time developing since 2016 I still used this one almost every project I complete. In terms of mobile optimisation. Bootstrap remains king!
It is simple and easy to learn. Allowing new developers to pick it up fast. And cutting down the work load for mobile optimisation greatly. I highly recommend BootStrap to any web developer.