Using the `css` prop to define styles in Styled Components

Sara Vieira: [0:00] I have these three buttons here and let's say, for some reason, I want this button, which is this one here in the elements tab, I want this to have a different color. One thing that we can always do is come here and say style and open another one and say color and then "green," if I wanted it green. I miswrote style, so that's why nothing was happening.

[0:26] If I do this, you can see that this adds it to the element.style, which is not the best way. This is very bad if we talk in terms of maintainability to override these styles. Fortunately, styled-components give us something called the CSS prop, which allows us to do this in a cleaner way. If I say css={}, you will see that absolutely nothing happens.

[0:49] One of the things that need to happen is that this includes a either Babel plugin or a macro. I'm using create-react-app, so I support macros. I need to import styled from "styled-components/macro".

[1:01] If I do this, you'll see that this button is green, and you will also see that it just has another class. Another class has been appended to it, and it just overrode whatever it had. If I add something else...Let's say that in here, this is supposed to be important -- where is that? Where is the color? Color, color, color -- and I put important, this is obviously overridden.

[1:31] The good thing about this is that it makes your CSS way more maintainable than normal style tags, as it is possible for you to override these things, as they are just applied CSS classes.

[1:41] This is how you can use the CSS tag in styled-components with the macro.