let PouchDB = require('pouchdb');
      PouchDB.plugin(require('pouchdb-load'));
      initDB() {
      this._db = new PouchDB('product4', { adapter: 'websql' });
       var myDumpedString = [{
        "name": "Product",
        "properties":
        {
            "id":
            {
                "type": "number",
                "description": "Product identifier",
                "required": true
            },
            "name":
            {
                "description": "Name of the product",
                "type": "string",
                "required": true
            },
            "price":
            {
                "type": "number",
                "minimum": 0,
                "required": true
            },
            "tags":
            {
                "type": "array",
                "items":
                {
                    "type": "string"
                }
            }
        }
    }];
    console.log((JSON.stringify(myDumpedString)));
    this._db.load(myDumpedString).then(function () {
        console.log("Done loading!");
    }).catch(function (err) {
        console.log("error!");
    });

    window["PouchDB"] = PouchDB;
}

GET http://localhost:8100/[object%20Object] 404 (Not Found)
     error!