Some components cannot be used until React Component is mounted

[jsantell]

When adding a raycaster and cursor component (to represent an <a-cursor>) to an entity, the element gets created before mounted to the DOM, causing the raycaster component's this.el.sceneEl to be undefined (as it has yet to be mounted), throwing an error and causing the scene to fail to render. A work around is to wait until the component is mounted to DOM and then adding more components, but this took some time to figure out. Similar to assumptions in #50 of when things are mounted and initialized, I wonder if there's a general way of handling this for all components.

import React, { Component, PropTypes } from 'react';
import { Entity } from 'aframe-react';

class CameraComponent extends Component {
  constructor() {
    super();
    this.state = {
      mounted: false,
    };
  }

  componentDidMount() {
    this.setState({ mounted: true });
  }

  render() {
    const mountedProps = {};

    if (this.state.mounted) {
      mountedProps.cursor = 'maxDistance: 100; fuse: true; fuseTimeout: 1000'
    };

    return (
      <Entity id='camera-container' {...this.props}>
        <Entity camera>
          <Entity
            {...mountedProps}
            raycaster='objects: .action'    
            geometry='primitive: plane'>
          </Entity>
        </Entity>
      </Entity>
    );
  }
};

export default CameraComponent;

[ngokevin]

That's weird since A-Frame won't try to execute the components until the entity is mounted.

[jsantell]

This is also after the a-scene's loading event is fired, if it helps

[ngokevin]

OK thanks, got a lot of maintenance lined up for aframe-react :)

[jsantell]

Looks like an aframe issue, filed aframevr/aframe#2225

Looks like I was wrong about that bug being related here, that example does not inject the component within an a-scene

[ngokevin]

v4.0.x should solve since .setAttribute()s are called on the ref, which is after mount. Will add unit tests though.

[ngokevin]

Added unit test for wrapped entity. 44bee27

Didn't see any errors in the log. Should work now since everything is initialized only once after the ref is attained. In other words, after mount.