@eva/react-eva/src/misc/preload.ts

React EVA是一个让开发同学能够在React技术体系下，利用EVA JS的游戏研发能力，开发动画、游戏类场景的框架。它可以让开发同学用熟悉的JSX和Hooks语法编写动画、游戏场景的代码。

import {resource, LOAD_EVENT} from '@eva/eva.js';

export class Preload {
  resources = {};

  onStart(fn) {
    const handler = fn;
    resource.on(LOAD_EVENT.START, handler);
    return this;
  }

  onProgress(fn) {
    const handler = fn;
    resource.on(LOAD_EVENT.PROGRESS, handler);
    return this;
  }

  onLoaded(fn) {
    const handler = fn;
    resource.on(LOAD_EVENT.LOADED, handler);
    return this;
  }

  onComplete(fn) {
    const handler = fn;
    resource.on(LOAD_EVENT.COMPLETE, handler);
    return this;
  }

  onError(fn) {
    const handler = fn;
    resource.on(LOAD_EVENT.ERROR, handler);
    return this;
  }
}

export default new Preload();