@gowri-d,

You can use react-modal module to generate modal and bind the click event in dataPoint to open modal as shown in the below code snippet.

 openModal(e) {
    this.setState({showModal: true, x: e.dataPoint.x, y: e.dataPoint.y});
  }
  .
  .
  .
   const options = {
      data: [
        {
          //Change type to "line", "bar", "area", "pie", etc.
          type: "column",
          click: this.openModal,
          dataPoints: [
            { label: "apple",  y: 10  },
            { label: "orange", y: 15  },
            { label: "banana", y: 25  },
            { label: "mango",  y: 30  },
            { label: "grape",  y: 28  }
          ]
        }
      ]
    },
    .
    .
    .
    <Modal
      isOpen={this.state.showModal}
      contentLabel="Modal"
      style={customStyles}
     >
     .
     .

Please checkout this StackBlitz project for an example on the same.

——
Manoj Mohan
Team CanvasJS