![]() I will not get into too much details about flexbox but, shortly, this is a display property like block or inline and using it helps us to design flexible responsive layout structures without using float or positioning. Bootstrap 4 uses flexbox! What is flexbox in Bootstrap 4? That's right! We have something new! Bootstrap 3 for example used the float property for columns. container class is declared inside the bootstrap.css file: To understand a little better how this works let's see how. Then it has specific CSS media queries to target also tablets, desktops etc. This means that every CSS class it is declared for small devices (portrait phones, less than 576px). Bootstrap 4 it is a mobile-first grid system. container is the most basic element in Bootstrap 4 and it is required when we use this grid system. col part can be really confusing right now, but I will explain this right away. Will discuss all these in more extensive way. col we can have multiple variants (like for example. I will use this grid background for a better understanding of the whole system. The 12 pink columns you see above are the ones which I mentioned before. This is a very simple Bootstrap 4 layout Īnd the above would look like this on a desktop, tablet or other device: Shortly, the HTML code for a very simple Bootstrap 4 grid layout would look something like this: In my opinion the main idea of the grid is that it uses three main classes. The main grid functionality of Bootstrap 4īootstrap 4 can be confusing for beginners. Of course, the whole framework is much more than this, as you will see. Based on built-in CSS, can adapt to various devices in a responsive way. Basically Bootstrap has a maximum of 12 columns layout. All will be ready without you needing to write CSS code, test it on multiple devices etc. All you have to do is just write the HTML code and apply the proper classes. ![]() Why would you need it? Because it has already the whole layout structure defined in a CSS file. Let's go! :) What exactly is Bootstrap 4 and why would I need it?īootstrap 4 is a CSS framework, like I wrote above, and it helps us to build responsive websites from scratch. It's the time to have a look at Bootstrap 4 grid system which brings pretty cool new things. Actually, some time ago I wrote an article about Bootstrap 3 grid system in which I have explained it in more detail. Bootstrap 4 has a better grid system than version 3 in my opinion. Bootstrap is the world's most popular framework for building responsive, mobile-first sites and with the new version of it it has become even more interesting to all of us.
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