缺少PouchDB适配器

Question

当我开始

$ gulp watch 

PouchDB已在Chrome版本50.0.2661.102（64位）

中成功创建

console.log(PouchDB.version);
console.log(lodash.keys(PouchDB.adapters));
new PouchDB('myname', {
  'adapter': 'idb', 
  'revs_limit': 1,
  'auto_compaction': true
});

并输出：

5.3.2
["http", "https", "idb", "websql"]

当我重新加载页面（Cmd + R）时，我收到错误适配器丢失：

5.3.2
["http", "https", "websql"]

Error: Adapter is missing 
at http://localhost:9000/bower_components/pouchdb/dist/pouchdb.js:5062:19 
at http://localhost:9000/bower_components/pouchdb/dist/pouchdb.js:5076:6 
at new PouchDB (http://localhost:9000/bower_components/pouchdb/dist/pouchdb.js:5026:17) 
at openDb (http://localhost:9000/main/services/local-db-pouch-serv.js:313:14) 
at service.open (http://localhost:9000/main/services/local-db-pouch-serv.js:48:21) 
at service.open (http://localhost:9000/main/services/local-db-serv.js:26:23) 
at Object.localDbResolve (http://localhost:9000/main/main.js:104:22) 
at Object.invoke (http://localhost:9000/bower_components/angular/angular.js:4535:17) 
at proceed (http://localhost:9000/bower_components/angular-ui-router/release/angular-ui-router.js:474:42) 
at invoke (http://localhost:9000/bower_components/angular-ui-router/release/angular-ui-router.js:470:26)

这是一个错误还是我错了？