To style your React-Native components, you will have to create stylesheets in Javascript. It looks similar to CSS, but it’s not exactly the same. This can be quite confusing at first, and you might reach a point where you wonder how you can create mixins like you would do with SASS, or how you can override the style of a component you want to reuse. Then you understand React-Native is not made from web elements and can’t be styled in the same way. Fortunately, you will most likely find alternative solutions available in order to accomplish what you need.