在div中动态插入React组件

Question

I'd like to insert dynamically several React component in a div HTML element. Every time that I click on button, I would like to add a new PeriodButtonContainer inside div with id="container" .

This is what I've tried so far:

class Period extends React.Component {
  addPeriodHandler = () => {
    /****?????******/
  };

  render() {
    return (
      <div>
        <div id="container">
          <PeriodButtonContainer />
        </div>
        <div>
          <button id="addPeriod" onClick={this.addPeriodHandler}>
            Add a period
          </button>
        </div>
      </div>
    );
  }
}

Thanks in advance

Answer 1

You could keep a counter that you increment on each button click, and create that many PeriodButtonContainer components in your render method with eg Array.from .

Example

class Period extends React.Component {
  state = { periods: 1 };

  addPeriodHandler = () => {
    this.setState(previousState => {
      return { periods: previousState.periods + 1 };
    });
  };

  render() {
    return (
      <div>
        <div id="container">
          {Array.from({ length: this.state.periods }, (_, index) => (
            <PeriodButtonContainer key={index} />
          ))}
        </div>
        <div>
          <button id="addPeriod" onClick={this.addPeriodHandler}>
            Add a period
          </button>
        </div>
      </div>
    );
  }
}