React and CSS

Learning Objectives

• Learn to Use CSS with React

CSS & React

Right now we have all the right elements, but we need some style to make it look like a proper tic tac toe game, let's try to make it look like this:

The simplest way is to add code to the index.css file. Let's do that!

/* * {
  border: 1px solid gold;
} */

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen",
    "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue",
    sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

code {
  font-family: source-code-pro, Menlo, Monaco, Consolas, "Courier New",
    monospace;
}

:root {
  --dark-cerulean: #124e78;
  --maastricht-blue: #0b132b;
  --yankees-blue: #1c2541;
  --sea-serpent: #5bc0be;
  --aquamarine: #6fffe9;
  --react: #00d8ff;
}

html {
  background: var(--yankees-blue);
}
body {
  margin: 0;
  font-family: "Montserrat", sans-serif;
  color: white;
}

.container > div {
  display: flex;
  background: var(--yankees-blue);
  flex-wrap: wrap;
  justify-content: space-around;
  min-height: 60vh;
  align-items: flex-start;
}

.app {
  display: flex;
  background: var(--yankees-blue);
  flex-wrap: wrap;
  justify-content: space-around;
  min-height: 60vh;
  align-items: flex-start;
}

.board {
  flex-basis: 60%;
  display: grid;
  grid-template-columns: 15vw 15vw 15vw;
  grid-template-rows: 15vw 15vw 15vw;
  color: white;
  justify-items: stretch;
  justify-content: center;
}

.board div {
  display: flex;
  align-itmes: center;
  border: 3px solid var(--react);
}

h1 {
  flex-basis: 100%;
}

h4,
h3 {
  text-align: center;
  flex-basis: 100%;
  align-self: center;
}

.X,
.O {
  flex-basis: 45%;
  text-align: center;
  justify-content: space-between;
}

.X {
  color: var(--sea-serpent);
}

.O {
  color: var(--aquamarine);
}
h1 {
  flex-basis: 60%;
  color: var(--react);
  text-align: center;
}

Let's add some classes to target parts of our components

GOTCHA Class is already a reserved word in JavaScript. We'll have to use className instead. React will compile it into the proper class attribute in the html that is rendered

App.js

App.js

<div className="app">
  <Header />
  <Player whichPlayer="X" />
  <Player whichPlayer="O" />
  <Board className="board" />
</div>;

Player.jsx

Player.jsx

class Player extends React.Component {
  render() {
    return (
      <div className={this.props.whichPlayer}>
        <h2>Player {this.props.whichPlayer} </h2>
        <h3>Wins: </h3>
      </div>
    );
  }
}

Board.jsx

Board.jsx

class Board extends React.Component {
  render() {
    return (
      <div className="board">
        <Square />
        <Square />
        <Square />
        <Square />
        <Square />
        <Square />
        <Square />
        <Square />
        <Square />
      </div>
    );
  }
}

Square.jsx

Square.jsx

class Square extends React.Component {
  render() {
    return (
      <div>
        <h4>square</h4>
      </div>
    );
  }
}

Extra

There are newer ways to incorporate CSS into react. You can read about 4 Ways to style react components and try to swap out our style sheet for one ore more of these methods