<div id="root"></div>
* {
  padding: 0;
  margin: 0;
}

div {
  box-sizing: border-box;
  font-family: Consolas, "楷体"
}

.container {
  width: 100%;
  min-height: 100vh;
  background-color: #CCC;
}

.header {
  width: 100%;
  height: 20vh;
  background-color: black;
  color: white;
  overflow: hidden;
}

.header ul {
  margin-top: 20px;
  margin-right: 10px;
}

.header li {
  list-style: none;
  padding-left: 5vw;
  float: right;
}

.main {
  display: flex;
  height: 80vh;
}

.content {
  width: 100%;
  padding-left: 50px;
  background-color: #FFF;
  padding-top: 20px;
  flex: 3;
}

.aside {
  padding: 20px 20px;
  flex: 1
}
class Layout extends React.Component {
  render() {
    return (
      <div className="container">
        <div className="header">
          <ul>
            <li>首页</li>
            <li>联系</li>
          </ul>
        </div>
        <div className="main">
          <div className="aside">aside</div>
          <div className="content">
            {this.props.children}
          </div>
        </div>
      </div>
    )
  }
}

class Content extends React.Component {
  render() {
    return (
      <div>Content</div>
    )
  }
}

ReactDOM.render(<Layout><Content /></Layout>, document.getElementById("root"));
View Compiled

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

  1. https://cdnjs.cloudflare.com/ajax/libs/react/16.12.0/umd/react.production.min.js
  2. https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.11.0/umd/react-dom.production.min.js