react实现img的onerror

import React from 'react';
import {Link} from 'react-router';
import ContactStore from '../stores/ContactStore'
import ContactActions from '../actions/ContactActions';

class Contact extends React.Component {
  constructor(props) {
    super(props);
    this.state = ContactStore.getState();
    this.onChange = this.onChange.bind(this); 
 }

componentDidMount() {
  ContactStore.listen(this.onChange);
  ContactActions.getContact(this.props.params.id);
}

componentWillUnmount() {
  ContactStore.unlisten(this.onChange);
}

componentDidUpdate(prevProps) {
  if (prevProps.params.id !== this.props.params.id) {
    ContactActions.getContact(this.props.params.id);
  }
}

onChange(state) {
  this.setState(state);
}

onError() {
  this.setState({
    imageUrl: "img/default.png"
  })
}

render() {
  return (
    

      

        

          
{this.state.contact.displayname}
          
        
      
    
  );
}

export default Contact;