Example of binding in render to pass relevant data to a click handler.

bindingInRender.js

import React from 'react';

class App extends React.Component {
  constructor() {
    this.state = {
      users: [
        { id: 1, name: 'Cory' }, 
        { id: 2, name: 'Meg' }
      ]
    };
  }
  
  deleteUser = id => {
    this.setState(prevState => {
      return { users: prevState.users.filter( user => user.id !== id)}
    })
  }

  render() {
    return (
      <div>
        <h1>Users</h1>
        <ul>
        { 
          this.state.users.map( user => {
            return (
              <li key={user.id}>
                <input 
                  type="button" 
                  value="Delete" 
                  onClick={() => this.deleteUser(user.id)} 
                /> 
                {user.name}
              </li>
            )
          })
        }
        </ul>
      </div>
    );
  }
}

export default App;