RxDB – Open Source Firebase Alternative (GitHub.com)

import*asRxDBfrom'rxdb';RxDB.create('heroesDB', 'websql', 'myLongAndStupidPassword', true)  // create database
  .then(db=>db.collection('mycollection', mySchema))              // create collection
  .then(collection=>collection.insert({name:'Bob'}))             // insert document

var RxDB =require('rxdb');RxDB.create('heroesDB', 'websql', 'myLongAndStupidPassword', true)      // create database
  .then(function(db) {returndb.collection('mycollection', mySchema);}) // create collection
  .then(function(collection) {collection.insert({name:'Bob'});})       // insert document

myCollection
  .find()
  .where('name').ne('Alice')
  .where('age').gt(18).lt(67)
  .limit(10)
  .sort('-age')
  .exec().then( docs=> {console.dir(docs);
  });

heroCollection
  .find()
  .sort('name')
  .$//<- returns observable of query
  .subscribe( docs=> {myDomElement.innerHTML= docs
      .map(doc=>'<li>'+doc.name+'</li>')
      .join();
  });

var mySchema = {
    title:"hero schema",
    description:"describes a simple hero",
    type:"object",
    properties: {
        name: {
            type:"string",
            primary:true//<- this means: unique, required, string and will be used as '_id'
        },
        secret: {
            type:"string",
            encrypted:true//<- this means that the value of this field is stored encrypted
        },
        skills: {
            type:"array",
            maxItems:5,
            uniqueItems:true,
            item: {
                type:"object",
                properties: {
                    name: {
                        type:"string"
                    },
                    damage: {
                        type:"number"
                    }
                }
            }
        }
    },
    required: ["color"]
};

// this requires the localstorage-adapterRxDB.plugin(require('rxdb-adapter-localstorage'));// this creates a database with the localstorage-adapterRxDB.create('heroesDB', 'localstorage');

// export a single collectionmyCollection.dump()
  .then(json=> {console.dir(json);
  });// export the whole databasemyDatabase.dump()
  .then(json=> {console.dir(json);
  });// import the dump to the collectionemptyCollection.importDump(json)
  .then(() => {console.log('done');
  });// import the dump to the databaseemptyDatabase.importDump(json)
  .then(() => {console.log('done');
  });

myRxDatabase.waitForLeadership()
  .then(() => {// this will only run when the instance becomes leader.
      mySocket =createWebSocket();
  });

// when you save an object with big keysawaitmyCollection.insert({
  firstName:'foo'
  lastName:'bar'
  stupidLongKey:5
});// RxDB will internally transform it to
{'|a':'foo''|b':'bar''|c':5
}// so instead of 46 chars, the compressed-version has only 28// the compression works internally, so you can of course still access values via the original key.namesconsole.log(myDoc.firstName);// 'foo'