javascript - react componentDidMount not firing

Question

I set up a new react project and for some reason, the componentDidMount method is not being called.

I have verified this behavior by placing a call to console.log in componentDidMount but I cannot see its output in the console.

Furthermore, this.setState() is not working.

I'm pretty stumped as to why the componentDidMount is not being called. I tried using both React "v0.14.0" and "v0.14.3".

Why is 'componentDidMount' not being called?

Code:

var React = require('react');

var RecipePage = React.createClass({
  componentDidMount: function() {
    console.log('mounted!');
  },
  render: function() {
    return (
      <div>Random Page</div>
    );
  }
});

module.exports = RecipePage;

Answer 1

This happened to me when I had componentWillMount() defined 2x in the same class. This did not produce a runtime error. I simply removed the second definition and things started working.