Example
For example, if we wanted to grab an entity’s three.js camera object or material object, we could reach into its components
var camera = document.querySelector('a-entity[camera]').components.camera.camera;
var material = document.querySelector('a-entity[material]').components.material.material;
Or if a component exposes an API, we can call its methods:
document.querySelector('a-entity[sound]').components.sound.pause();
