import { LightningElement, track } from 'lwc';

export default class MyComponent extends LightningElement {
  @track isFlowVisible = false;

  launchFlow() {
    this.isFlowVisible = true;
    this.template.querySelector('lightning-flow').startFlow('ShowingText');
  }

  hideFlow() {
    this.isFlowVisible = false;
  }
}