├── docs
    ├── .nojekyll
    ├── _navbar.md
    ├── favicon.ico
    ├── assets
    │   └── device
    │   │   └── checkLayoutOrientation
    │   │       └── checkLayoutOrientation-2.jpeg
    ├── _coverpage.md
    ├── _sidebar.md
    ├── other
    │   ├── _about.md
    │   ├── _start.md
    │   └── _update.md
    ├── lib
    │   ├── _delete.md
    │   ├── _other.md
    │   ├── _update.md
    │   ├── _add.md
    │   └── _query.md
    ├── index.html
    ├── js
    │   └── d-js-utils.js
    └── docsify.js
├── src
    ├── uitils
    │   ├── config.js
    │   ├── type.js
    │   ├── log.js
    │   └── Dep.js
    ├── global.js
    ├── Idb.js
    └── DB.js
├── .gitignore
├── .babelrc
├── example
    ├── index.html
    ├── db_student_config.js
    └── index.js
├── package.json
└── README.md


/docs/.nojekyll:
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1 | 


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/src/uitils/config.js:
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1 | export const NAME = 'idb-js';


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/docs/_navbar.md:
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1 | * [github](https://www.github.com/ifmiss/d-js-utils)


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/docs/favicon.ico:
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https://raw.githubusercontent.com/verybigorange/idb-js/HEAD/docs/favicon.ico


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/.gitignore:
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 1 | node_modules
 2 | .DS_Store
 3 | npm-debug.log
 4 | lerna-debug.log
 5 | npm-debug.log.*
 6 | lerna-debug.log.*
 7 | .idea
 8 | .vscode
 9 | .npmrc
10 | dist/
11 | .cache


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/docs/assets/device/checkLayoutOrientation/checkLayoutOrientation-2.jpeg:
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https://raw.githubusercontent.com/verybigorange/idb-js/HEAD/docs/assets/device/checkLayoutOrientation/checkLayoutOrientation-2.jpeg


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/.babelrc:
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 1 | {
 2 |   "presets": [
 3 |     [
 4 |       "env",
 5 |       {
 6 |         "modules": false
 7 |       }
 8 |     ]
 9 |   ],
10 |   "plugins": [
11 |     "external-helpers"
12 |   ]
13 | }


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/src/uitils/type.js:
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1 | export const isObject = data => Object.prototype.toString.call(data) === "[object Object]"
2 | export const isArray = data => Object.prototype.toString.call(data) === "[object Array]"


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/docs/_coverpage.md:
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1 | # idb-js <small>2.0.0</small>
2 | 
3 | > 基于indedb的封装，简单易用。
4 | 
5 | * 作者：verybigorange
6 | * QQ: 449732828
7 | 
8 | [GitHub](https://github.com/verybigorange/idb-js)
9 | [Get Started](/other/_about.md)


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/src/uitils/log.js:
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 1 | import { NAME } from "./config";
 2 | 
 3 | export function log_error(msg = "") {
 4 |   throw new Error(`${NAME}：${msg}`);
 5 | }
 6 | 
 7 | export function log(msg = "") {
 8 |   console.log(`${NAME}：${msg}`);
 9 | }
10 | 


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/docs/_sidebar.md:
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 1 | * 开始
 2 |   * [简介](/other/_about.md)
 3 |   * [快速开始](/other/_start.md)
 4 |   * [更新内容](/other/_update.md)
 5 |   * 
 6 | * db方法
 7 |   * [增加](/lib/_add.md)
 8 |   * [删除](/lib/_delete.md)
 9 |   * [查询](  /lib/_query.md)
10 |   * [修改](  /lib/_update.md)
11 |   * [其他](  /lib/_other.md)
12 | 


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/src/uitils/Dep.js:
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 1 | class Dep {
 2 |   constructor() {
 3 |     this.deps = [];
 4 |   }
 5 | 
 6 |   add(element) {
 7 |     this.deps.push(element);
 8 |   }
 9 | 
10 |   notify() {
11 |     for (let i = 0; i < this.deps.length; i++) {
12 |       this.deps[i]();
13 |     }
14 |     this.deps.length = 0;
15 |   }
16 | }
17 | 
18 | export default Dep;


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/src/global.js:
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1 | // 兼容
2 | export const indexedDB = window.indexedDB || window.mozIndexedDB || window.webkitIndexedDB || window.msIndexedDB;
3 | export const IDBTransaction = window.IDBTransaction || window.webkitIDBTransaction || window.msIDBTransaction;
4 | export const IDBKeyRange = window.IDBKeyRange || window.webkitIDBKeyRange || window.msIDBKeyRange;


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/docs/other/_about.md:
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 1 | # 简介
 2 | #### 产生背景
 3 | 随着前端业务的复杂以及浏览器的迭代，越来越多的网站考虑用indexdb做前端数据缓存，但是原始API使用起来相对比较麻烦，所以诞生了idb-js。
 4 | 
 5 | #### 功能描述
 6 | 主要包括建立数据库，建立表（store），以及一些增删查改的api。
 7 | 
 8 | #### 2.0与1.0的区别
 9 | 2.0较于1.0最大的改变就是更加简单、灵活。
10 | - 2.0版本支持Promise，而不再是callback
11 | - 基于奥卡姆剃刀，去掉部分不常用的API，只保留常用基本的API，化繁为简
12 | - 提供创建事务的API和获取DB的API，让用户使用更加灵活，不局限于当前库的方法


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/example/index.html:
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 1 | <!DOCTYPE html>
 2 | <html lang="en">
 3 | <head>
 4 |     <meta charset="UTF-8">
 5 |     <meta name="viewport" content="width=device-width, initial-scale=1.0">
 6 |     <meta http-equiv="X-UA-Compatible" content="ie=edge">
 7 |     <title>Document</title>
 8 | </head>
 9 | <body>
10 |     <script src="./index.js"></script>
11 | </body>
12 | </html>


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/docs/lib/_delete.md:
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 1 | # 删除
 2 | 删除数据库中的一条或者多条数据
 3 | 
 4 | ## delete
 5 | `delete`游标的方式删除单条或者多条数据
 6 | ##### 参数
 7 |   - `{Object}`
 8 |   
 9 | ##### 属性
10 |   - `tableName` { String } 表名
11 |   - `condition` [非必传，不传则全部数据] { Function } 匹配条件 @return { Boolean }
12 | ##### 返回值 `Promise<[]>`
13 | 
14 | ##### `Demo`:
15 | ```js
16 |   // 将grade表中，将name是小红的数据删除
17 |   const res = await IDB.delete({
18 |     tableName: "grade",
19 |     condition: (item, index) => item.name === "小红",
20 |   });
21 |   console.log("删除的数据：", res);
22 | ```


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/docs/other/_start.md:
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 1 | # 快速使用
 2 | #### 安装
 3 | 使用npm安装 `idb-js` 依赖
 4 | ```bash
 5 | npm install idb-js
 6 | ```
 7 | #### 使用
 8 | * 第一步： 引入Idb
 9 | ```
10 |     import Idb from 'idb-js'  //  引入Idb
11 | ```
12 | * 第二步： 引入数据库配置
13 | ```
14 |     import IDB_Config from './IDB_Config.js'
15 | ```
16 |   
17 | * 第三步： 载入配置，数据库开启成功拿到数据库实例进行操作
18 | ```
19 |     Idb(IDB_Config).then(IDB => {...})
20 | ```
21 | 
22 | #### 数据库配置
23 | IDB_Config.js
24 | 
25 | ```
26 | export default {
27 |   dbName: "myDB",
28 |   version: 1,
29 |   tables: [
30 |     {
31 |       tableName: "表名1",
32 |       option: { keyPath: "id" },
33 |     },
34 |   ],
35 | };
36 | ```


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/src/Idb.js:
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 1 | import DB from "./DB";
 2 | import { log } from "./uitils/log";
 3 | 
 4 | function Idb({ dbName, version = new Date().getTime(), tables = [] }) {
 5 |   const db = new DB({
 6 |     dbName,
 7 |     version
 8 |   });
 9 | 
10 |   for (let tableItem of tables) {
11 |     // tableItem<Object> @tableName,@option,@indexs
12 |     db.add_table(tableItem);
13 |   }
14 | 
15 |   return new Promise((resolve, reject) => {
16 |     db.open({
17 |       success: () => {
18 |         log(`数据库 ${dbName} 已经打开`);
19 |         resolve(db);
20 |       },
21 |       error: err => {
22 |         reject(err);
23 |       }
24 |     });
25 |   });
26 | }
27 | 
28 | export default Idb;


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/docs/lib/_other.md:
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 1 | # 其他API
 2 | 
 3 | 
 4 | ## transaction
 5 | `transaction`创建一个事务
 6 | ##### 参数
 7 |   - `string` 表名
 8 | 
 9 | ##### 返回值 `Promise<事务对象store>`
10 |  
11 | 
12 | ##### `Demo`:
13 | ```js
14 |   // 开启一个事务查询所有数据
15 |   const store = await IDB.transaction("grade");
16 |   store.getAll().onsuccess = function (event) {
17 |     console.log("开启一个事务，查询所有数据:", event.target.result);
18 |   };
19 | ```
20 | 关于事务操作的更多方法，请查看 https://developer.mozilla.org/zh-CN/docs/Web/API/IDBObjectStore
21 | 
22 | ## getDB
23 | `getDB`获取IDBDatabase对象
24 | ##### 参数
25 |   无
26 | 
27 | ##### 返回值 `Promise<事务对象store>`
28 |  
29 | 
30 | ##### `Demo`:
31 | ```js
32 |   // 关闭数据库
33 |   const db = await IDB.getDB();
34 |   db.close();
35 | ```
36 | 
37 | 关于IDBDatabase对象更多信息，请查看 https://developer.mozilla.org/zh-CN/docs/Web/API/IDBDatabase


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/docs/other/_update.md:
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 1 | # 更新内容
 2 | 
 3 | ### 2.0.0
 4 |   - `2023-08-08`
 5 |     - 增删查改全面升级
 6 |       - 支持 `promise`
 7 |       - `condition` 中注入 `index`
 8 |     - 废弃部分API
 9 |       - `close_db`
10 |       - `delete_db`
11 |       - `clear_table`
12 |       - `delete_by_primaryKey`
13 |       - `query_by_primaryKey`
14 |       - `query_by_index`
15 |     - `insert` 更改为 `add`
16 |     
17 | ### 1.3.1
18 |   - `2019-2-15` 
19 |     - `insert`方法中，底层将`add` 替换成 `put`的方式
20 | 
21 | ### 1.3.0
22 |   - `2018-12-14` 增加文档
23 | 
24 | ### 1.2.1
25 |   - `2018-12-07` 完成了基础方法
26 |     - `close_db`
27 |     - `delete_db`
28 |     - `clear_table`
29 |     - `insert`
30 |     - `query`
31 |     - `query_by_primaryKey`
32 |     - `query_by_index`
33 |     - ,`queryAll`
34 |     - `delete`
35 |     - `delete_by_primaryKey`
36 |     - `update`
37 |     - `update_by_primaryKey`
38 | 


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/docs/lib/_update.md:
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 1 | # 修改
 2 | 修改数据库中的一条或者多条数据
 3 | 
 4 | ## update
 5 | `update`游标的方式修改单条或者多条数据
 6 | ##### 参数
 7 |   - `{Object}`
 8 |   
 9 | ##### 属性
10 |   - `tableName` { String } 表名
11 |   - `condition` [非必传，不传则全部数据] { Function } 匹配条件 @return { Boolean }
12 |   - `handler` { Function } 修改方式
13 | 
14 | ##### 返回值 `Promise<[]>`
15 | ##### `Demo`:
16 | ```js
17 |   // 根据条件修改
18 |   // 将grade表中，将name是小明的全部数据的score修改为100
19 |   const res = await IDB.update({
20 |     tableName: "grade",
21 |     condition: (item, index) => item.name === '小明',
22 |     handler: (row) => {
23 |       row.score = 100;
24 |     },
25 |   });
26 |   console.log("根据条件修改的数据：", res);
27 | ```
28 | 
29 | ```js
30 | // 全部数据修改-全部数据增加新字段newField
31 | const res = await IDB.update({
32 |   tableName: "grade",
33 |   handler: (row, index) => {
34 |     row.newField = "这是新字段";
35 |   },
36 | });
37 | console.log("全部数据修改-增加新字段：", res);
38 | ```


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/docs/lib/_add.md:
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 1 | # 增加
 2 | 向数据库中插入数据
 3 | 
 4 | ## add
 5 | `add`添加单条或者多条数据
 6 | ##### 参数
 7 |   - `{Object}`
 8 |   
 9 | ##### 属性
10 |   - `tableName` { String } 表名
11 |   - `data` { Object \| Array } 数据,单个对象或者一个数组对象
12 |   
13 | ##### 返回值 `Promise`
14 | ##### `Demo`:
15 | ```js
16 |     // 插入单条数据
17 |    try {
18 |     await IDB.add({
19 |       tableName: "grade",
20 |       data: {
21 |         id: 1,
22 |         score: 98,
23 |         name: "小明",
24 |       },
25 |     });
26 |     console.log("数据添加成功");
27 |   } catch (error) {
28 |     console.log("数据添加失败", error);
29 |   }
30 | 
31 |     // 插入多条数据
32 |     await IDB.add({
33 |       tableName: "grade",
34 |       data: [
35 |         {
36 |           id: 2,
37 |           score: 99,
38 |           name: "小红",
39 |         },
40 |         {
41 |           id: 3,
42 |           score: 100,
43 |           name: "小刚",
44 |         },
45 |       ],
46 |     });
47 | ```


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/example/db_student_config.js:
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 1 | export default {
 2 |   dbName: "student",
 3 |   version: 1,
 4 |   tables: [
 5 |     {
 6 |       tableName: "grade",
 7 |       option: { keyPath: "id" },
 8 |     },
 9 |     // {
10 |     //   tableName: "info",
11 |     //   option: { keyPath: "id" },
12 |     //   indexs: [  // 创建索引 https://developer.mozilla.org/en-US/docs/Web/API/IDBObjectStore/createIndex
13 |     //     {
14 |     //       key: "id",
15 |     //       option: {
16 |     //         unique: true,
17 |     //       },
18 |     //     },
19 |     //     {
20 |     //       key: "name",
21 |     //       option: {
22 |     //         unique: false,
23 |     //       },
24 |     //     },
25 |     //     {
26 |     //       key: "age",
27 |     //       option: {
28 |     //         unique: false,
29 |     //       },
30 |     //     },
31 |     //     {
32 |     //       key: "sex",
33 |     //       option: {
34 |     //         unique: false,
35 |     //       },
36 |     //     },
37 |     //   ],
38 |     // },
39 |   ],
40 | };
41 | 


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/docs/lib/_query.md:
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 1 | # 查询
 2 | 查询数据库中的一条或者多条数据
 3 | 
 4 | ## query
 5 | `query`游标的方式查询单条或者多条数据
 6 | ##### 参数
 7 |   - `{Object}`
 8 |   
 9 | ##### 属性
10 |   - `tableName` { String } 表名
11 |   - `condition` [非必传，不传则全部数据] { Function } 匹配条件 @return { Boolean }
12 | 
13 | ##### 返回值 `Promise<[]>`
14 |  
15 | 
16 | ##### `Demo`:
17 | ```js
18 |   // 按条件查询
19 |   // 将grade表中，将score是100的数据查询出来
20 |   const res = await IDB.query({
21 |     tableName: "grade",
22 |     condition: (item, index) => item.score == 100,
23 |   });
24 |   console.log(`按条件查询：`, res);
25 | ```
26 | 
27 | ```js
28 |   // 查询全部数据
29 |   const res = await IDB.query({
30 |     tableName: "grade",
31 |   });
32 |   console.log(`查询全部数据:`, res);
33 | ```
34 | 
35 | ```js
36 |   // 按分页查询
37 |   const res = await IDB.query({
38 |     tableName: "grade",
39 |     condition: (item, index) => {
40 |       const page = 2;
41 |       const pageSize = 2;
42 |       const min = (page - 1) * pageSize;
43 |       const max = page * pageSize;
44 |       return index >= min && index < max;
45 |     },
46 |   });
47 |   console.log(`按分页查询`, res);
48 | ```


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/package.json:
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 1 | {
 2 |   "name": "idb-js",
 3 |   "version": "2.0.0",
 4 |   "description": "Simple to use indexdb",
 5 |   "main": "dist/Idb.js",
 6 |   "scripts": {
 7 |     "test": "echo \"Error: no test specified\" && exit 1",
 8 |     "start": "parcel  --port 3001 example/index.html",
 9 |     "build": "node build.js",
10 |     "publish": "npm publish --access public",
11 |     "doc": "docsify serve docs"
12 |   },
13 |   "files": [
14 |     "src",
15 |     "dist/*.js",
16 |     "example/**"
17 |   ],
18 |   "author": "zhoucheng",
19 |   "license": "ISC",
20 |   "bugs": {
21 |     "url": "https://github.com/verybigorange/indexDB_easy/issues"
22 |   },
23 |   "repository": {
24 |     "type": "git",
25 |     "url": "https://github.com/verybigorange/indexDB_easy.git"
26 |   },
27 |   "keywords": [
28 |     "indexdb",
29 |     "database",
30 |     "indexDB"
31 |   ],
32 |   "devDependencies": {
33 |     "ansi-styles": "^3.2.1",
34 |     "babel-core": "^6.26.3",
35 |     "babel-plugin-external-helpers": "^6.22.0",
36 |     "babel-preset-env": "^1.7.0",
37 |     "chalk": "^2.4.1",
38 |     "parcel-bundler": "^1.12.5",
39 |     "rmrf": "^2.0.0",
40 |     "rollup": "^0.67.3",
41 |     "rollup-plugin-babel": "^3.0.7",
42 |     "rollup-plugin-node-resolve": "^3.4.0",
43 |     "rollup-plugin-uglify": "^6.0.0"
44 |   }
45 | }
46 | 


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/docs/index.html:
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 1 | <!DOCTYPE html>
 2 | <html lang="en">
 3 | <head>
 4 |   <meta charset="UTF-8">
 5 |   <title>idb-js</title>
 6 |   <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" />
 7 |   <meta name="description" content="d-js-utils">
 8 |   <link rel="shortcut icon" href="./favicon.ico">
 9 |   <meta name="viewport" content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
10 |   <link rel="stylesheet" href="//unpkg.com/docsify/lib/themes/vue.css" title="vue">
11 |   <link rel="stylesheet" href="//unpkg.com/docsify/lib/themes/dark.css" title="dark" disabled>
12 |   <link rel="stylesheet" href="//unpkg.com/docsify/lib/themes/buble.css" title="buble" disabled>
13 |   <link rel="stylesheet" href="//unpkg.com/docsify/lib/themes/pure.css" title="pure" disabled>
14 |   <!-- gitalk -->
15 |   <!-- <link rel="stylesheet" href="//unpkg.com/gitalk/dist/gitalk.css"> -->
16 |   <!-- <link rel="stylesheet" href="//unpkg.com/docsify-copy-code/styles.css" > -->
17 | </head>
18 | <body>
19 |   <div id="app">
20 |     加载中
21 |   </div>
22 |   <script>
23 |     window.$docsify = {
24 |       coverpage: true,
25 |       name: 'idb-js',
26 |       loadSidebar: true,
27 |       alias: {
28 |         '/.*/_sidebar.md': '/_sidebar.md'
29 |       },
30 |       repo: 'https://github.com/verybigorange/idb-js',
31 |       maxLevel: 4,
32 |       subMaxLevel: 2,
33 |       search: {
34 |         maxAge: 86400000, // 过期时间，单位毫秒，默认一天
35 |         paths: 'auto', // or 'auto'
36 |         placeholder: 'Type to search',
37 | 
38 |         // 支持本地化
39 |         placeholder: {
40 |           '/zh-cn/': '搜索',
41 |           '/': 'Type to search'
42 |         },
43 | 
44 |         noData: 'No Results!',
45 | 
46 |         // 支持本地化
47 |         noData: {
48 |           '/zh-cn/': '找不到结果',
49 |           '/': 'No Results'
50 |         },
51 | 
52 |         // 搜索标题的最大程级, 1 - 6
53 |         depth: 3
54 |       },
55 |       
56 |     }
57 |   </script>
58 |   <script src="//unpkg.com/docsify-edit-on-github@1.0.1/index.js"></script>
59 |   <script src="./docsify.js"></script>
60 |   <script src="./js/d-js-utils.js"></script>
61 |   <script src="//unpkg.com/docsify/lib/plugins/search.js"></script>
62 | 
63 |   <!-- 图片缩放 - Zoom image -->
64 |   <script src="//unpkg.com/docsify/lib/plugins/zoom-image.js"></script>
65 | 
66 | </body>
67 | </html>
68 | 


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/example/index.js:
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  1 | import Idb from "../src/Idb";
  2 | import db_student_config from "./db_student_config";
  3 | 
  4 | (async function () {
  5 |   const IDB = await Idb(db_student_config);
  6 |   console.log(IDB);
  7 | 
  8 |   try {
  9 |     // 添加一条数据
 10 |     await IDB.add({
 11 |       tableName: "grade",
 12 |       data: {
 13 |         id: 1,
 14 |         score: 98,
 15 |         name: "小明",
 16 |       },
 17 |     });
 18 |     console.log("数据添加成功");
 19 |   } catch (error) {
 20 |     console.log("数据添加失败", error);
 21 |   }
 22 | 
 23 |   // 添加多条数据
 24 |   try {
 25 |     await IDB.add({
 26 |       tableName: "grade",
 27 |       data: [
 28 |         {
 29 |           id: 2,
 30 |           score: 99,
 31 |           name: "小红",
 32 |         },
 33 |         {
 34 |           id: 3,
 35 |           score: 100,
 36 |           name: "小刚",
 37 |         },
 38 |         {
 39 |           id: 4,
 40 |           score: 67,
 41 |           name: "小刚刚",
 42 |         },
 43 |         {
 44 |           id: 5,
 45 |           score: 100,
 46 |           name: "小李",
 47 |         },
 48 |         {
 49 |           id: 6,
 50 |           score: 100,
 51 |           name: "小高",
 52 |         },
 53 |       ],
 54 |     });
 55 |   } catch (error) {}
 56 | 
 57 |   // 按分页查询
 58 |   const res = await IDB.query({
 59 |     tableName: "grade",
 60 |     condition: (item, index) => {
 61 |       const page = 2;
 62 |       const pageSize = 2;
 63 |       const min = (page - 1) * pageSize;
 64 |       const max = page * pageSize;
 65 |       return index >= min && index < max;
 66 |     },
 67 |   });
 68 |   console.log(`按分页查询`, res);
 69 | 
 70 |   // 按条件查询
 71 |   const res1 = await IDB.query({
 72 |     tableName: "grade",
 73 |     condition: (item, index) => item.score == 100,
 74 |   });
 75 |   console.log(`按条件查询：`, res1);
 76 | 
 77 |   // 查询全部
 78 |   const res2 = await IDB.query({
 79 |     tableName: "grade",
 80 |   });
 81 |   console.log(`查询全部:`, res2);
 82 | 
 83 |   // 根据条件修改
 84 |   const res3 = await IDB.update({
 85 |     tableName: "grade",
 86 |     condition: (item, index) => item.score == 100,
 87 |     handler: (row) => {
 88 |       row.name = "新名字";
 89 |     },
 90 |   });
 91 |   console.log("根据条件修改的数据：", res3);
 92 | 
 93 |   // 全部数据修改-增加新字段
 94 |   const res4 = await IDB.update({
 95 |     tableName: "grade",
 96 |     handler: (row, index) => {
 97 |       row.newField = "这是新字段";
 98 |     },
 99 |   });
100 |   console.log("全部数据修改-增加新字段：", res4);
101 | 
102 |   // 删除数据
103 |   const res5 = await IDB.delete({
104 |     tableName: "grade",
105 |     condition: (item, index) => item.name === "小红",
106 |   });
107 |   console.log("删除的数据：", res5);
108 | 
109 |   // 开启一个事务
110 |   const store = await IDB.transaction("grade");
111 |   store.getAll().onsuccess = function (event) {
112 |     console.log("开启一个事务，查询所有数据:", event.target.result);
113 |   };
114 | 
115 |   // 获取IDBDatabase对象
116 |   const db = await IDB.getDB();
117 |   console.log("getDB", db);
118 | })();
119 | 


--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
  1 | # idb-js
  2 | 基于indexdb本地数据库的封装, 简单易用.
  3 | 
  4 | [文档地址](https://verybigorange.github.io/idb-js/)
  5 | 
  6 | #### 安装
  7 | 使用npm安装 `idb-js` 依赖
  8 | ```bash
  9 | npm install idb-js
 10 | ```
 11 | #### 使用
 12 | * 第一步： 引入Idb
 13 | ```
 14 |     import Idb from 'idb-js'  //  引入Idb
 15 | ```
 16 | * 第二步： 引入数据库配置
 17 | ```
 18 |     import IDB_Config from './IDB_Config.js'
 19 | ```
 20 |   
 21 | * 第三步： 载入配置，数据库开启成功拿到数据库实例进行操作
 22 | ```
 23 |     Idb(IDB_Config).then(IDB => {...})
 24 | ```
 25 | 
 26 | #### 数据库配置
 27 | IDB_Config.js
 28 | 
 29 | ```
 30 | export default {
 31 |   dbName: "myDB",
 32 |   version: 1,
 33 |   tables: [
 34 |     {
 35 |       tableName: "表名1",
 36 |       option: { keyPath: "id" },
 37 |     },
 38 |   ],
 39 | };
 40 | ```
 41 | 
 42 | 
 43 | ### add
 44 | 添加单条或者多条数据
 45 | 
 46 | ##### `Demo`:
 47 | ```js
 48 |     // 插入单条数据
 49 |    try {
 50 |     await IDB.add({
 51 |       tableName: "grade",
 52 |       data: {
 53 |         id: 1,
 54 |         score: 98,
 55 |         name: "小明",
 56 |       },
 57 |     });
 58 |     console.log("数据添加成功");
 59 |   } catch (error) {
 60 |     console.log("数据添加失败", error);
 61 |   }
 62 | 
 63 |     // 插入多条数据
 64 |     await IDB.add({
 65 |       tableName: "grade",
 66 |       data: [
 67 |         {
 68 |           id: 2,
 69 |           score: 99,
 70 |           name: "小红",
 71 |         },
 72 |         {
 73 |           id: 3,
 74 |           score: 100,
 75 |           name: "小刚",
 76 |         },
 77 |       ],
 78 |     });
 79 | ```
 80 | 
 81 | ### delete
 82 | 删除数据库中的一条或者多条数据
 83 | 
 84 | ##### `Demo`:
 85 | ```js
 86 |   // 将grade表中，将name是小红的数据删除
 87 |   const res = await IDB.delete({
 88 |     tableName: "grade",
 89 |     condition: (item, index) => item.name === "小红",
 90 |   });
 91 |   console.log("删除的数据：", res);
 92 | ```
 93 | 
 94 | ### qeury
 95 | 查询数据库中的一条或者多条数据
 96 | 
 97 | ##### `Demo`:
 98 | ```js
 99 |   // 按条件查询
100 |   // 将grade表中，将score是100的数据查询出来
101 |   const res = await IDB.query({
102 |     tableName: "grade",
103 |     condition: (item, index) => item.score == 100,
104 |   });
105 |   console.log(`按条件查询：`, res);
106 | ```
107 | ```js
108 |   // 查询全部数据
109 |   const res = await IDB.query({
110 |     tableName: "grade",
111 |   });
112 |   console.log(`查询全部数据:`, res);
113 | ```
114 | 
115 | ```js
116 |   // 按分页查询
117 |   const res = await IDB.query({
118 |     tableName: "grade",
119 |     condition: (item, index) => {
120 |       const page = 2;
121 |       const pageSize = 2;
122 |       const min = (page - 1) * pageSize;
123 |       const max = page * pageSize;
124 |       return index >= min && index < max;
125 |     },
126 |   });
127 |   console.log(`按分页查询`, res);
128 | ```
129 | 
130 | ### update
131 | 修改数据库中的一条或者多条数据
132 | 
133 | ##### `Demo`:
134 | ```js
135 |   // 根据条件修改
136 |   // 将grade表中，将name是小明的全部数据的score修改为100
137 |   const res = await IDB.update({
138 |     tableName: "grade",
139 |     condition: (item, index) => item.name === '小明',
140 |     handler: (row) => {
141 |       row.score = 100;
142 |     },
143 |   });
144 |   console.log("根据条件修改的数据：", res);
145 | ```
146 | 
147 | ```js
148 | // 全部数据修改-全部数据增加新字段newField
149 | const res = await IDB.update({
150 |   tableName: "grade",
151 |   handler: (row, index) => {
152 |     row.newField = "这是新字段";
153 |   },
154 | });
155 | console.log("全部数据修改-增加新字段：", res);
156 | ```
157 | 
158 | ### transaction
159 | 创建一个事务
160 | 
161 | ##### `Demo`:
162 | ```js
163 |   // 开启一个事务查询所有数据
164 |   const store = await IDB.transaction("grade");
165 |   store.getAll().onsuccess = function (event) {
166 |     console.log("开启一个事务，查询所有数据:", event.target.result);
167 |   };
168 | ```
169 | 关于事务操作的更多方法，请查看 https://developer.mozilla.org/zh-CN/docs/Web/API/IDBObjectStore
170 | 
171 | ### getDB
172 | 获取IDBDatabase对象
173 | 
174 | ##### `Demo`:
175 | ```js
176 |   // 关闭数据库
177 |   const db = await IDB.getDB();
178 |   db.close();
179 | ```
180 | 
181 | 关于IDBDatabase对象更多信息，请查看 https://developer.mozilla.org/zh-CN/docs/Web/API/IDBDatabase
182 | 
183 | 
184 | ### TODO
185 | - 增加单元测试
186 | - 支持Typescript
187 | 


--------------------------------------------------------------------------------
/src/DB.js:
--------------------------------------------------------------------------------
  1 | import Dep from "./uitils/Dep.js";
  2 | import { log_error } from "./uitils/log";
  3 | import { indexedDB, IDBTransaction, IDBKeyRange } from "./global";
  4 | import { isArray, isObject } from "./uitils/type.js";
  5 | import { NAME } from "./uitils/config.js";
  6 | 
  7 | class DB {
  8 |   constructor({ dbName, version }) {
  9 |     this.dbName = dbName;
 10 |     this.version = version;
 11 |     this.db = null;
 12 |     this.idb = null;
 13 |     this.tables = [];
 14 |     this._status = false; // 是否先添加了表
 15 |     this._dep_ = new Dep();
 16 |   }
 17 | 
 18 |   /**
 19 |    * 打开数据库
 20 |    * @success 成功的回调，返回db，非必传
 21 |    * @error 失败的回调，返回错误信息，非必传
 22 |    * */
 23 |   open(ops) {
 24 |     let success = () => {},
 25 |       error = () => {};
 26 | 
 27 |     if (ops) {
 28 |       success = ops.success ? ops.success : success;
 29 |       error = ops.error ? ops.error : error;
 30 |     }
 31 | 
 32 |     // 打开前要先添加表
 33 |     if (this.tables.length == 0 && !this._status) {
 34 |       log_error("打开前要先用add_table添加表");
 35 |       return;
 36 |     }
 37 | 
 38 |     if (typeof success !== "function") {
 39 |       log_error("open中success必须是一个function类型");
 40 |       return;
 41 |     }
 42 | 
 43 |     const request = indexedDB.open(this.dbName, this.version);
 44 | 
 45 |     request.onerror = (e) => {
 46 |       error(e.currentTarget.error.message);
 47 |     };
 48 | 
 49 |     request.onsuccess = (e) => {
 50 |       this.db = e.target.result;
 51 |       success(this.db);
 52 |       this._dep_.notify();
 53 |     };
 54 | 
 55 |     request.onupgradeneeded = (e) => {
 56 |       this.idb = e.target.result;
 57 | 
 58 |       for (let i = 0; i < this.tables.length; i++) {
 59 |         this.__create_table(this.idb, this.tables[i]);
 60 |       }
 61 |     };
 62 |   }
 63 | 
 64 |   /**
 65 |    * 添加一张表
 66 |    * @param tableOption<Object>
 67 |    * @tableName 表名
 68 |    * @option 表配置
 69 |    * @index 索引配置
 70 |    * */
 71 |   add_table(tableOption = {}) {
 72 |     this._status = false;
 73 |     this.tables.push(tableOption);
 74 |   }
 75 | 
 76 |   /**
 77 |    * 开启一个事务
 78 |    * @param tableName 表名
 79 |    * @param mode 模式 readonly | readwrite
 80 |    * @return promise<store>
 81 |    * */
 82 |   transaction(tableName, mode = "readwrite") {
 83 |     return this.__action(() =>
 84 |       this.db.transaction(tableName, mode).objectStore(tableName)
 85 |     );
 86 |   }
 87 | 
 88 |   /**
 89 |    * 返回IDBDatabase对象
 90 |    * @return promise<IDBDatabase>
 91 |    * */
 92 |   getDB() {
 93 |     return this.__action(() => this.db);
 94 |   }
 95 | 
 96 |   /**
 97 |    * @method 查询
 98 |    * @param {Object}
 99 |    *   @property {String} tableName 表名
100 |    *   @property {Function} condition 查询的条件,如果不传，默认查询全部数据
101 |    *      @arg {Object} 遍历每条数据，和filter类似
102 |    *      @arg {number} 索引index，从0开始
103 |    *      @return 条件
104 |    *  @return Promise<[]>
105 |    * */
106 |   query({ tableName, condition = () => true }) {
107 |     return this.__action(() =>
108 |       this.__create_transaction(
109 |         tableName,
110 |         (store) => {
111 |           return new Promise(async (resolve, reject) => {
112 |             try {
113 |               const res = [];
114 |               let index = 0;
115 |               this.__openCursor(store, async (cursor) => {
116 |                 if (cursor) {
117 |                   if (await condition(cursor.value, index)) {
118 |                     res.push(cursor.value);
119 |                   }
120 |                   cursor.continue();
121 |                   index++;
122 |                 } else {
123 |                   resolve(res);
124 |                 }
125 |               });
126 |             } catch (error) {
127 |               reject(error);
128 |             }
129 |           });
130 |         },
131 |         "readonly"
132 |       )
133 |     );
134 |   }
135 | 
136 |   /**
137 |    * @method 增加数据
138 |    * @param {Object}
139 |    *   @property {String} tableName 表名
140 |    *   @property {Object} data 插入的数据
141 |    *   @property {Function} [success] 插入成功的回调
142 |    *  @return {Promise}
143 |    * */
144 |   add({ tableName, data }) {
145 |     if (!(isArray(data) || isObject(data))) {
146 |       log_error("in insert，data type is Object or Array");
147 |       return;
148 |     }
149 | 
150 |     return this.__action(() =>
151 |       this.__create_transaction(
152 |         tableName,
153 |         (store) => {
154 |           isArray(data) ? data.forEach((v) => store.add(v)) : store.add(data);
155 |         },
156 |         "readwrite"
157 |       )
158 |     );
159 |   }
160 | 
161 |   /**
162 |    * @method 删除数据
163 |    * @param {Object}
164 |    *   @property {String} tableName 表名
165 |    *   @property {Function} condition 查询的条件，遍历，与filter类似,默认全部数据
166 |    *      @arg {Object} 每个元素
167 |    *      @arg {Number} 索引index，从0开始
168 |    * */
169 |   delete({ tableName, condition = () => true }) {
170 |     return this.__action(() =>
171 |       this.__create_transaction(
172 |         tableName,
173 |         (store) => {
174 |           return new Promise(async (resolve, reject) => {
175 |             try {
176 |               const res = [];
177 |               let index = 0;
178 |               this.__openCursor(store, async (cursor) => {
179 |                 if (cursor) {
180 |                   let curValue = cursor.value;
181 |                   if (await condition(curValue, index)) {
182 |                     cursor.delete(curValue);
183 |                     res.push(curValue);
184 |                   }
185 |                   cursor.continue();
186 |                   index++;
187 |                 } else {
188 |                   resolve(res);
189 |                 }
190 |               });
191 |             } catch (error) {
192 |               reject(error);
193 |             }
194 |           });
195 |         },
196 |         "readwrite"
197 |       )
198 |     );
199 |   }
200 | 
201 |   /**
202 |    * @method 修改数据
203 |    * @param {Object}
204 |    *   @property {String} tableName 表名
205 |    *   @property {Function} condition 查询的条件，遍历，与filter类似,默认全部数据
206 |    *      @arg {Object} 每个元素
207 |    *      @arg {Number} 索引index，从0开始
208 |    *   @property {Function} handler 处理函数，接收本条数据的引用，对其修改
209 |    * */
210 |   update({ tableName, handler, condition = () => true }) {
211 |     return this.__action(() =>
212 |       this.__create_transaction(
213 |         tableName,
214 |         (store) => {
215 |           return new Promise(async (resolve, reject) => {
216 |             try {
217 |               const res = [];
218 |               let index = 0;
219 |               this.__openCursor(store, async (cursor) => {
220 |                 if (cursor) {
221 |                   let curValue = cursor.value;
222 |                   if (await condition(curValue, index)) {
223 |                     await handler(curValue);
224 |                     cursor.update(curValue);
225 |                     res.push(curValue);
226 |                   }
227 |                   cursor.continue();
228 |                   index++;
229 |                 } else {
230 |                   resolve(res);
231 |                 }
232 |               });
233 |             } catch (error) {
234 |               reject(error);
235 |             }
236 |           });
237 |         },
238 |         "readwrite"
239 |       )
240 |     );
241 |   }
242 | 
243 |   /**
244 |    * @method 开启游标
245 |    * @param  Store
246 |    * @param  callback {游标}
247 |    * */
248 |   __openCursor(store, callback) {
249 |     const request = store.openCursor();
250 | 
251 |     request.onsuccess = (e) => {
252 |       const cursor = e.target.result;
253 |       callback(cursor);
254 |     };
255 |   }
256 | 
257 |   /**
258 |    * @method 开启事务
259 |    * @param {String} 表名
260 |    * @param {String} 事务权限
261 |    * @return {Promise}
262 |    * */
263 |   __create_transaction(tableName, handler, mode = "readwrite") {
264 |     return new Promise(async (resolve, reject) => {
265 |       if (!tableName || !mode) {
266 |         reject();
267 |         throw new Error(
268 |           "in __create_transaction,tableName and mode is required"
269 |         );
270 |       }
271 |       const transaction = this.db.transaction(tableName, mode);
272 | 
273 |       const store = transaction.objectStore(tableName);
274 | 
275 |       let data = null;
276 |       try {
277 |         data = await handler(store);
278 |       } catch (error) {
279 |         reject(error);
280 |       }
281 | 
282 |       transaction.oncomplete = (event) => {
283 |         resolve({ data, event });
284 |       };
285 |       transaction.onerror = (event) => {
286 |         reject({
287 |           name: NAME,
288 |           msg: event.target.error,
289 |           event,
290 |         });
291 |       };
292 |     });
293 |   }
294 | 
295 |   // db是异步的,保证fn执行的时候db存在
296 |   __action(handler) {
297 |     return new Promise((resolve, reject) => {
298 |       const action = async () => {
299 |         try {
300 |           const result = await handler();
301 |           resolve(result);
302 |         } catch (error) {
303 |           reject(error);
304 |         }
305 |       };
306 |       // 如果db不存在，加入依赖
307 |       if (!this.db) {
308 |         this._dep_.add(action);
309 |       } else {
310 |         action();
311 |       }
312 |     });
313 |   }
314 | 
315 |   /**
316 |    * 创建table
317 |    * @option<Object>  keyPath指定主键 autoIncrement是否自增
318 |    * @index 索引配置
319 |    * */
320 |   __create_table(idb, { tableName, option, indexs = [] }) {
321 |     if (!idb.objectStoreNames.contains(tableName)) {
322 |       let store = idb.createObjectStore(tableName, option);
323 |       for (let indexItem of indexs) {
324 |         this.__create_index(store, indexItem);
325 |       }
326 |     }
327 |   }
328 | 
329 |   /**
330 |    * 创建索引
331 |    * @option<Object> unique是否是唯一值
332 |    * */
333 |   __create_index(store, { key, option }) {
334 |     store.createIndex(key, key, option);
335 |   }
336 | }
337 | 
338 | export default DB;
339 | 


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/docs/js/d-js-utils.js:
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