Why does React warn me against binding a component method to the object?

Question

I have this here component. I want to pass down a call handler to each listElement I create. If I do it like below, with bind(this), it works properly. The prob

Answer 1

The error is coming from somewhere else in the code. You get the error when you do this.someFunction.bind(something) and something isn't null.

this.someFunction.bind({}, foo);    // warning
this.someFunction.bind(this, foo);  // warning, you're doing this
this.someFunction.bind(null, foo);  // okay!

Do a search for .bind(this in your code to find the offending line.

Answer 2

Here is updated docs example

React.createClass({
  onClick: function(event) {/* do something with this */},
  render: function() {
    return <button onClick={this.onClick} />;
  }
});

Update in ReactJS Docs