react-component-managers/es/mountManager.js

react-component-managers React component

import spyOnComponent from 'spy-on-component';
export default function spyOnMount(componentInstance) {
  var mounted = true;
  spyOnComponent(componentInstance, {
    componentWillUnmount: function componentWillUnmount() {
      mounted = false;
    }
  });
  return function () {
    return mounted;
  };
}