如何仅在通过另一个文件提供链接时显示按钮(React)

import React from 'react';

class LinkButton extends React.Component {
  render() {
    return (
      <button>
        <a href={this.props.link}>{this.props.label}</a>
      </button>
    );
  }
}

export default LinkButton;

import React from 'react';
import LinkButton from './LinkButton';

class App extends React.Component {
  render() {
    return (
      <div>
        <h1>My App</h1>
        <LinkButton link="https://example.com" label="Go to Example" />
      </div>
    );
  }
}

export default App;