jsonplaceholder_offline 1.0.3

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jsonplaceholder_offline #

A simple package that allows you to get data for your project on the go without relying on the network

Installation #

Add this to your package's pubspec.yaml file

    jsonplaceholder_offline: 1.0.3

and run

flutter packages get

How it work #

The package is offline version ofJsonPlaceholder Jsonplaceholder has 6 different data categories:

  • User
  • Post
  • Comment
  • Album
  • Photo
  • Todo

you can get data in two format either object or json.

  • to get object data you will need to call getData<T>(length:1) method with length as a parameter
  • to get json data you will need to call getJsonData<T>(length:1) method with length as a parameter


  • length is number of data you wish to return. from (min 1 - max 100)

  • T is the generic reference of your category.

    Usage #

    Getting Object data #

list of Users #

JsonPlaceholder jsonPlaceholder = JsonPlaceholder();
List<User> users = jsonPlaceholder.getData<User>(length: 20);

a single User object #

JsonPlaceholder jsonPlaceholder = JsonPlaceholder();
User user = jsonPlaceholder.getData<User>(length:1);

Getting Json data #

list of users data #

JsonPlaceholder jsonPlaceholder = JsonPlaceholder();
List<Map<String, dynamic>> users = jsonPlaceholder.getJsonData<User>(length: 20);

a single User json #

JsonPlaceholder jsonPlaceholder = JsonPlaceholder();
Map<String, dynamic> user = jsonPlaceholder.getJsonData<User>(length:1);

Get UserPost by userId #

 JsonPlaceholder jsonPlaceholder = JsonPlaceholder();
 List<dynamic> comments = jsonPlaceholder.getUserPosts(userId: 1, toJson: false);

*NB: toJson property can be set to true if you want the return data to be in JSON format*

Get PostComment by postId #

JsonPlaceholder jsonPlaceholder = JsonPlaceholder();
List<dynamic> comments = jsonPlaceholder.getUserPosts(postId: 1, toJson: false);

*NB: toJson property can be set to true if you want the return data to be in JSON format*

Mocking HTTP Request #

if you want to get your data in HTTP Request behaviour, you can mock the behaviour using mockHttp<T>({RESTMETHOD httpMethod, int delay, int length})

JsonPlaceholder jsonPlaceholder = JsonPlaceholder();
Map<String, dynamic> data = await jsonPlaceholder.mockHttp<User>(httpMethod: RESTMETHOD.GET, length: 10, delay: 20);


  • httpMethod: {GET,POST,PUT,DELETE}
  • delay: This is the number of seconds you want your request to take before it return data.
  • length: This is the number of data you want to return

Data credit: https://jsonplaceholder.typicode.com/

[0.0.1] #

  • Initial version of the library

[1.0.0] #

  • Update the documentation
  • Add object to json feature

[1.0.1] #

  • Update the documentation
  • Add get PostComments feature
  • Add get UserPosts feature

[1.0.2] #

  • Bug fix
  • Improved documentation

[1.0.3] #

  • Add mockHttp feature
  • updated the documentation


import 'package:flutter/material.dart';
import 'package:jsonplaceholder_offline/jsonplaceholder_offline.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        // This is the theme of your application.
        // Try running your application with "flutter run". You'll see the
        // application has a blue toolbar. Then, without quitting the app, try
        // changing the primarySwatch below to Colors.green and then invoke
        // "hot reload" (press "r" in the console where you ran "flutter run",
        // or simply save your changes to "hot reload" in a Flutter IDE).
        // Notice that the counter didn't reset back to zero; the application
        // is not restarted.
        primarySwatch: Colors.blue,
      home: MyHomePage(title: 'Flutter Demo Home Page'),

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  // This widget is the home page of your application. It is stateful, meaning
  // that it has a State object (defined below) that contains fields that affect
  // how it looks.

  // This class is the configuration for the state. It holds the values (in this
  // case the title) provided by the parent (in this case the App widget) and
  // used by the build method of the State. Fields in a Widget subclass are
  // always marked "final".

  final String title;

  _MyHomePageState createState() => _MyHomePageState();

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;

  void _incrementCounter() {
    //JsonPlaceholderOffline placeholderOffline = JsonPlaceholderOffline();
    // print(placeholderOffline);

  Widget build(BuildContext context) {
    // This method is rerun every time setState is called, for instance as done
    // by the _incrementCounter method above.
    // The Flutter framework has been optimized to make rerunning build methods
    // fast, so that you can just rebuild anything that needs updating rather
    // than having to individually change instances of widgets.
    return Scaffold(
      appBar: AppBar(
        // Here we take the value from the MyHomePage object that was created by
        // the App.build method, and use it to set our appbar title.
        title: Text(widget.title),
      body: Center(
        // Center is a layout widget. It takes a single child and positions it
        // in the middle of the parent.
        child: Column(
          // Column is also a layout widget. It takes a list of children and
          // arranges them vertically. By default, it sizes itself to fit its
          // children horizontally, and tries to be as tall as its parent.
          // Invoke "debug painting" (press "p" in the console, choose the
          // "Toggle Debug Paint" action from the Flutter Inspector in Android
          // Studio, or the "Toggle Debug Paint" command in Visual Studio Code)
          // to see the wireframe for each widget.
          // Column has various properties to control how it sizes itself and
          // how it positions its children. Here we use mainAxisAlignment to
          // center the children vertically; the main axis here is the vertical
          // axis because Columns are vertical (the cross axis would be
          // horizontal).
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
              'You have pushed the button this many times:',
              style: Theme.of(context).textTheme.display1,
      floatingActionButton: FloatingActionButton(
        onPressed: _incrementCounter,
        tooltip: 'Increment',
        child: Icon(Icons.add),
      ), // This trailing comma makes auto-formatting nicer for build methods.

Use this package as a library

1. Depend on it

Add this to your package's pubspec.yaml file:

  jsonplaceholder_offline: ^1.0.3

2. Install it

You can install packages from the command line:

with Flutter:

$ flutter pub get

Alternatively, your editor might support flutter pub get. Check the docs for your editor to learn more.

3. Import it

Now in your Dart code, you can use:

import 'package:jsonplaceholder_offline/jsonplaceholder_offline.dart';
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Learn more about scoring.

We analyzed this package on Apr 3, 2020, and provided a score, details, and suggestions below. Analysis was completed with status completed using:

  • Dart: 2.7.1
  • pana: 0.13.6
  • Flutter: 1.12.13+hotfix.8

Health issues and suggestions

Document public APIs. (-0.67 points)

89 out of 90 API elements have no dartdoc comment.Providing good documentation for libraries, classes, functions, and other API elements improves code readability and helps developers find and use your API.


Package Constraint Resolved Available
Direct dependencies
Dart SDK >=2.1.0 <3.0.0
flutter 0.0.0
Transitive dependencies
collection 1.14.11 1.14.12
meta 1.1.8
sky_engine 0.0.99
typed_data 1.1.6
vector_math 2.0.8
Dev dependencies
test any