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STATUS: Obsolete - see this updated proposal instead.

Extend IDBDatabase with:

interface IDBDatabase {
  IDBExplicitTransaction explicitTransaction(scope, mode);
};

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// http://cautionsingularityahead.blogspot.com/2012/07/resource-using-in-javascript.html

// Say you have a heavy-weight resource that you can explicitly finalize - either through
// some API or just by dropping a reference when you're done even if you want to hold onto
// the wrapper:
function Resource(a) {
  var res = "a resource of " + a;

  this.get = function() {
    return res;

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#!/usr/bin/env bash

# Usage:
#     echo -e "... $(text-style style ...) ..."
#     echo -e "... $(text-reset) ..."
#     echo -e "... $(text-color r g b) ..."
#     echo -e "... $(background-color r g b) ..."
#
# Where:
#     styles:

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IndexedDB with Promises

This is a hacky prototype of what IDB-on-Promises could look like.

STATUS: See this updated proposal instead.

See also:

https://github.com/slightlyoff/Promises/tree/master/historical_interest/reworked_APIs/IndexedDB

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// Copyright 2019 Google LLC.
// SPDX-License-Identifier: Apache-2.0

var name = 'db' + Date.now();
var openReq = indexedDB.open(name, 1);
openReq.onupgradeneeded = function() {
  var db = openReq.result;
  var store = db.createObjectStore('store');
  for (var i = 0; i < 100; i += 10)
    store.put("record-" + i, i);

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// Copyright 2019 Google LLC.
// SPDX-License-Identifier: Apache-2.0

// Basic p(r)olyfill for proposed feature

// This defines no successor of empty arrays, so the range for prefix
// [] or [[],[]] has no upper bound.
// An alternate definition would preclude adding additional nesting,
// so the range for prefix [] would have upper bound [[]] and the
// range for prefix [[], []] would have upper bound [[], [[]]].