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Indexed DB - N-Dimensional Selection

The problem

We have an index with keys of the form:

[ dim1, dim2, dim3, ... ]

e.g. created with:

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This demonstrates the implementation of full text search for documents in Indexed DB.

• Word-breaking and stemming is used to create a list of terms for each document.
• Document records are annotated with the list of terms when added to the database.
• A multi-entry index on the list of terms is populated.
• A query is similarly processed into a list of terms.
• A join over the terms is implemented using multiple cursors on the index.

The necessity of annotating records with the word list to populate the index is a limitation of the current Indexed DB API. A feature request to support custom

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WHATWG-style logos for W3C/WICG specs - just because I like logos and a consistent iconography.

• Cookie Store API
• Indexed Database API
• File System
• File and Directory Entries API
• Local Font Access
• Idle Detection
• Web Locks API
• Multi-Screen Window Placement

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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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URLs into Indexed DB, via Service Workers

Let's say you're using Indexed DB for the offline data store for a catalog. One of the object stores contains product images. Wouldn't it be great if you could just have something like this in your catalog page?

<img src="indexeddb/database/store/id">

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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 [[], [[]]].

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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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Indexed DB - N-Dimensional Selection (V2)

This is a redo of the solution over in Indexed DB - N-Dimensional Selection but with a revised "API". The sample here takes a query in the form of an array of IDBKeyRange instances (or null), e.g.

select(index, [IDBKeyRange.bound(5, 7), null, IDBKeyRange.lowerBound(15000)], callback, complete);

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Following proposal by @littledan

THIS NO LONGER MATCHES THE PROPOSED API AND SHOULD NOT BE USED

• Proposal
• Slides

Just proof-of-concept. Do not use in production.

Caveats:

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