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Programming language: JavaScript
License: Apache License 2.0
Tags: Storage    

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README

Dexie.js

NPM Version Build StatusTested with Browserstack

Dexie.js is a wrapper library for indexedDB - the standard database in the browser. https://dexie.org

Why?

Dexie solves three main issues with the native IndexedDB API:

  1. Ambiguous error handling
  2. Poor queries
  3. Code complexity

Dexie provides a neat database API with a well thought-through API design, robust error handling, extendability, change tracking awareness and extended KeyRange support (case insensitive search, set matches and OR operations).

Hello World
<!doctype html>
<html>
 <head>
  <script src="https://unpkg.com/dexie@latest/dist/dexie.js"></script>
  <script>
   //
   // Declare Database
   //
   var db = new Dexie("FriendDatabase");
   db.version(1).stores({
     friends: "++id,name,age"
   });

   //
   // Manipulate and Query Database
   //
   db.friends.add({name: "Josephine", age: 21}).then(function() {
       return db.friends.where("age").below(25).toArray();
   }).then(function (youngFriends) {
       alert ("My young friends: " + JSON.stringify(youngFriends));
   }).catch(function (e) {
       alert ("Error: " + (e.stack || e));
   });
  </script>
 </head>
</html>

Yes, it's that simple.

An equivalent modern version (works in all modern browsers):

<!doctype html>
<html>
 <head>
  <script type="module">
   import Dexie from "https://unpkg.com/dexie@latest/dist/modern/dexie.mjs";
   //
   // Declare Database
   //
   const db = new Dexie("FriendDatabase");
   db.version(1).stores({
     friends: "++id,name,age"
   });

   //
   // Manipulate and Query Database
   //
   try {
     await db.friends.add({name: "Josephine", age: 21});
     const youngFriends = await db.friends.where("age").below(25).toArray();
     alert (`My young friends: ${JSON.stringify(youngFriends)}`);
   } catch (e) {
     alert (`Error: ${e}`);
   }
  </script>
 </head>
</html>

Tutorial

API Reference

Samples

Performance

Dexie has kick-ass performance. Its bulk methods take advantage of a lesser-known feature in IndexedDB that makes it possible to store stuff without listening to every onsuccess event. This speeds up the performance to a maximum.

Supported operations
above(key): Collection;
aboveOrEqual(key): Collection;
add(item, key?): Promise;
and(filter: (x) => boolean): Collection;
anyOf(keys[]): Collection;
anyOfIgnoreCase(keys: string[]): Collection;
below(key): Collection;
belowOrEqual(key): Collection;
between(lower, upper, includeLower?, includeUpper?): Collection;
bulkAdd(items: Array): Promise;
bulkDelete(keys: Array): Promise;
bulkPut(items: Array): Promise;
clear(): Promise;
count(): Promise;
delete(key): Promise;
distinct(): Collection;
each(callback: (obj) => any): Promise;
eachKey(callback: (key) => any): Promise;
eachPrimaryKey(callback: (key) => any): Promise;
eachUniqueKey(callback: (key) => any): Promise;
equals(key): Collection;
equalsIgnoreCase(key): Collection;
filter(fn: (obj) => boolean): Collection;
first(): Promise;
get(key): Promise;
inAnyRange(ranges): Collection;
keys(): Promise;
last(): Promise;
limit(n: number): Collection;
modify(changeCallback: (obj: T, ctx:{value: T}) => void): Promise;
modify(changes: { [keyPath: string]: any } ): Promise;
noneOf(keys: Array): Collection;
notEqual(key): Collection;
offset(n: number): Collection;
or(indexOrPrimayKey: string): WhereClause;
orderBy(index: string): Collection;
primaryKeys(): Promise;
put(item: T, key?: Key): Promise;
reverse(): Collection;
sortBy(keyPath: string): Promise;
startsWith(key: string): Collection;
startsWithAnyOf(prefixes: string[]): Collection;
startsWithAnyOfIgnoreCase(prefixes: string[]): Collection;
startsWithIgnoreCase(key: string): Collection;
toArray(): Promise;
toCollection(): Collection;
uniqueKeys(): Promise;
until(filter: (value) => boolean, includeStopEntry?: boolean): Collection;
update(key: Key, changes: { [keyPath: string]: any }): Promise;

This is a mix of methods from WhereClause, Table and Collection. Dive into the API reference to see the details.

Hello World (Typescript)
import Dexie, { Table } from 'dexie';

interface Friend {
    id?: number;
    name?: string;
    age?: number;
}

//
// Declare Database
//
class FriendDatabase extends Dexie {
    public friends!: Table<Friend, number>; // id is number in this case

    public constructor() {
        super("FriendDatabase");
        this.version(1).stores({
            friends: "++id,name,age"
        });
    }
}

const db = new FriendDatabase();

db.transaction('rw', db.friends, async() => {

    // Make sure we have something in DB:
    if ((await db.friends.where({name: 'Josephine'}).count()) === 0) {
        const id = await db.friends.add({name: "Josephine", age: 21});
        alert (`Addded friend with id ${id}`);
    }

    // Query:
    const youngFriends = await db.friends.where("age").below(25).toArray();

    // Show result:
    alert ("My young friends: " + JSON.stringify(youngFriends));

}).catch(e => {
    alert(e.stack || e);
});

Samples

https://dexie.org/docs/Samples

https://github.com/dexie/Dexie.js/tree/master/samples

Knowledge Base

https://dexie.org/docs/Questions-and-Answers

Website

https://dexie.org

Install over npm

npm install dexie

Download

For those who don't like package managers, here's the download links:

Legacy:

https://unpkg.com/dexie@latest/dist/dexie.min.js

https://unpkg.com/dexie@latest/dist/dexie.min.js.map

Modern:

https://unpkg.com/dexie@latest/dist/modern/dexie.min.mjs

https://unpkg.com/dexie@latest/dist/modern/dexie.min.mjs.map

Typings:

https://unpkg.com/dexie@latest/dist/dexie.d.ts

Contributing

See [CONTRIBUTING.md](CONTRIBUTING.md)

Build

pnpm install
pnpm run build

Test

pnpm test

Watch

pnpm run watch