text: import React, { Component } from 'react';
  
  export default class DecrementButton extends Component {
    handleButtonClick = () => {
      this.props.onDecrement('-');
    };
  
    render() {
      return (
        <button
          onClick={this.handleButtonClick}
          className="waves-effect waves-light btn red darken-4"
        >
          -
        </button>
      );
    }
  }
  