Bad React event pattern

gistfile1.txt

import React, { Component } from 'react';

class Eventer extends React.Component {
  constructor(props) {
    super(props);

    this.state = {
      something: 'test'
    };
  }

  get trigger() {
    return (event) => {
      this.stateChanger(function stateChanged() {
        console.log(event); // this will be an `nulled` event { preventDefault: null, stopPropagation: null, etc }
      });
    };
  }

  stateChanger(done) {
    this.setState({
      something: 'changed'
    }, done);
  }

  render() {
    return <a onClick={this.trigger}>{this.state.something}</a>;
  }
}