摘要：簡介離線存儲，提供強大的封裝專業封裝給封裝類似類似接口如果你熟悉那一定會用使用類似的接口操作基于的瀏覽器端數據庫基于的瀏覽器端數據庫小型數據庫，瀏覽器端基于風格的接口，讓它非常可愛

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有些安全性不太重要的數據，我不想花大力氣搞一臺服務器，再安裝mysql或者 monogdb，再寫點rest接口。這也太麻煩了，瀏覽器里本來就有很好用的數據庫。你為什么不嘗試一下呢？

如果要使用localStorage，那么存儲量比較小。如果是用indexDB，那么最好找點開源庫，直接封裝友好的API, 來方便我們使用indexDB。

下面介紹一些很好用的的庫。

離線存儲， 提供強大的API封裝IndexedDB,WebSQL,localStorage

12073 star

https://github.com/localForag...

localforage.setItem("key", "value", function (err) {
  // if err is non-null, we got an error
  localforage.getItem("key", function (err, value) {
    // if err is non-null, we got an error. otherwise, value is the value
  });
});

專業封裝 IndexedDB

3040 star

https://github.com/dfahlander...

    const db = new Dexie("MyDatabase");

    // Declare tables, IDs and indexes
    db.version(1).stores({
        friends: "++id, name, age"
    });

      // Find some old friends
    await db.friends
        .where("age")
        .above(75)
        .toArray();

    // or make a new one
    await db.friends.add({
        name: "Camilla",
        age: 25,
        street: "East 13:th Street",
        picture: await getBlob("camilla.png")
    });

給HTML5 IndexedDB 封裝類似mongodb類似接口, 如果你熟悉mongodb, 那一定會用zangodb

688 star

https://github.com/erikolson1...

let db = new zango.Db("mydb", { people: ["age"] });
let people = db.collection("people");

let docs = [
    { name: "Frank", age: 20 },
    { name: "Thomas", age: 33 },
    { name: "Todd", age: 33 },
    { name: "John", age: 28 },
    { name: "Peter", age: 33 },
    { name: "George", age: 28 }
];

people.insert(docs).then(() => {
    return people.find({
        name: { $ne: "John" },
        age: { $gt: 20 }
    }).group({
        _id: { age: "$age" },
        count: { $sum: 1 }
    }).project({
        _id: 0,
        age: "$_id.age"
    }).sort({
        age: -1
    }).forEach(doc => console.log("doc:", doc));
}).catch(error => console.error(error));

使用類似 sql的接口操作 indexDB

74 star

https://github.com/ujjwalgupt...

var value = {
    column1: value1,
    column2: value2,
    column3: value3,
    ...
    columnN: valueN
};

connection.insert({
    into: "TABLE_NAME",
    values: [Value], //you can insert multiple values at a time

}).then(function(rowsAffected) {
    if (rowsAffected > 0) {
        alert("Successfully Added");
    }
}).catch(function(error) {
    alert(error.message);
});

基于localstorage的瀏覽器端mongodb數據庫

697 star

https://github.com/mWater/min...

// Require minimongo
var minimongo = require("minimongo");

var LocalDb = minimongo.MemoryDb;

// Create local db (in memory database with no backing)
db = new LocalDb();

// Add a collection to the database
db.addCollection("animals");

doc = { species: "dog", name: "Bingo" };

// Always use upsert for both inserts and modifies
db.animals.upsert(doc, function() {
    // Success:

    // Query dog (with no query options beyond a selector)
    db.animals.findOne({ species:"dog" }, {}, function(res) {
        console.log("Dog"s name is: " + res.name);
    });
});

基于indexDB的CouchDB-style瀏覽器端數據庫

10599 star

https://github.com/pouchdb/po...

var db = new PouchDB("dbname");

db.put({
  _id: "dave@gmail.com",
  name: "David",
  age: 69
});

db.changes().on("change", function() {
  console.log("Ch-Ch-Changes");
});

db.replicate.to("http://example.com/mydb");

小型json數據庫，瀏覽器端基于localStorage, lodash風格的接口，讓它非常可愛