02-opening-a-database

Opening an IndexedDB database

/application.js

(function() {
  var db;

  databaseOpen()
    .then(function() {
      alert("The database has been opened");
    });

  function databaseOpen() {
    return new Promise(function(resolve, reject) {
      var version = 1;
      var request = indexedDB.open('todos', version);
      request.onsuccess = function(e) {
        db = e.target.result;
        resolve();
      };
      request.onerror = reject;
    });
  }

}());

All this code does is create a database with indexedDB.open and then shows the user an old-fashioned alert if it is successful. Every IndexedDB database needs a name (in this case, todos) and a version number (which I’ve set to 1).

But how can we check that this has actually worked?

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