应用状态

# 尚未发布到 npm。首次发布后此命令才可用。
npm install @elata-biosciences/app-state

import { getState, setState, deleteState } from '@elata-biosciences/app-state';

// 从未存储过则为 null
const save = await getState('save_slot_1');

await setState('save_slot_1', { level: 7, hp: 100 });

// 幂等：即使该键从未设置过也不会报错
await deleteState('save_slot_1');

function stateCall(type, payload) {
  return new Promise((resolve, reject) => {
    const requestId = crypto.randomUUID();
    const onMessage = (e) => {
      if (e.data?.type !== `${type}:result` || e.data.requestId !== requestId) return;
      window.removeEventListener('message', onMessage);
      e.data.error ? reject(new Error(e.data.error)) : resolve(e.data);
    };
    window.addEventListener('message', onMessage);
    window.parent.postMessage({ type, requestId, ...payload }, '*');
  });
}

const { value } = await stateCall('elata:state:get', { key: 'save_slot_1' });
await stateCall('elata:state:set', { key: 'save_slot_1', value: { level: 7 } });
await stateCall('elata:state:delete', { key: 'save_slot_1' });