@cesium/engine/Source/Scene/TileState.js

CesiumJS is a JavaScript library for creating 3D globes and 2D maps in a web browser without a plugin.

/**
 * @private
 */
const TileState = {
  START: 0,
  LOADING: 1,
  READY: 2,
  UPSAMPLED_ONLY: 3,
};
export default Object.freeze(TileState);