jb_responsive_breakpoints 5.0.0

  • README.md
  • Example
  • Installing
  • Versions
  • 0


An Angular Dart Service to register a listener function to media query updates without dealing with matchMedia.

Notice: Package renamed

The Version 5.0 will be the latest version with the package name jb_responsive_breakpoints. The new package name is jb_media_query_service.

How to use

Declare JbMediaQueryService as provider, inject it into your component (called mqService in example) and call
mqService.register(callbackFunction, minWidth: 300)
mqService.registerStringQuery(callbackFunction, '(minWidth:600px)'.

The register method provides a shortcut for the most used media queries, currently min-width and min-height media queries. If both are given, they will be connected by and. The registerStringQuery method allows you to register an arbitrary mediaQuery which is accepted by window.matchMedia.


Please look at the example folder in the Github Repository.

Build 'System'

The build system consists of a script system with the 'scripts' package for dart. This works analoguous to the npm scripts feature.

Activate Scripts

pub global activate scripts

Basic Scripts Commands

  • scripts get
  • scripts install <package>
  • scripts clean
  • scripts <customScriptName> (see pubspec.yaml)

Custom Scripts Commands

  • check-pkg - checks package health for pub.dartlang.org with the pana package
  • format-src - format sources with dartfmt



  • moved content from./web to ./example
  • changed architecture to be a more simple media query service instead of a big component with unnecessary complicated bindings
  • adjusted example to fit new JbMediaQueryService


  • added two dev dependencies back to normal dependencies because of transformer


  • moves some dependencies to dev_dependencies


  • updates to angular 4.0.0
  • introduces strong mode & checked dart2js (dartdevc not compatible with angular currently)


  • updated dependencies, mainly angular2 to 2.2.0
  • removed test folder and entry_point from test folder in angular transformer in pubspec.yaml


  • upgraded dependencies again - angular2 Beta 20
  • added consumer component example to test injecting activeBreakpoints inside components
  • changed onBreakpointChange EventEmitter to emit new list references on every breakpoint change


-downgraded dependencies - angular2 Beta 17


  • updated dependencies - angular2 Beta 19


  • emits now change events instead of refreshing the whole component tree on media queries


  • updated syntax to Angular 2


  • changed internals to use window.matchMedia
  • problem with TwoWayBinding in AngularDart likely broken in version 1.16 of the dart sdk, maybe caused by some code generation issues


  • Initial version


library jb_responsive_breakpoints.app_init;

import 'package:angular/angular.dart';
import 'package:logging/logging.dart';
import 'package:logging_handlers/logging_handlers_shared.dart';
import 'package:jb_responsive_breakpoints/jb_responsive_breakpoints.dart';

final Logger _libLogger = new Logger("jb_responsive_breakpoints");

void main() {
  //init logging
  hierarchicalLoggingEnabled = true;
  Logger.root.onRecord.listen(new LogPrintHandler());

  Logger.root.level = Level.OFF;
  _libLogger.level = Level.ALL;
  //could be customized with _libLogger.level =  Level.INFO or Level.OFF and
  // then add specific logger
  //_logger.level = Level.All


    selector: 'app-root',
    templateUrl: 'app_component.html',
    directives: const [CORE_DIRECTIVES],
    providers: const [JbMediaQueryService])
class AppComponent implements OnInit {
  JbMediaQueryService mqService;

  Map<String, String> colors = {
    'default': '#aaaaaa',
    'min300': '#aaaa00',
    'min600': '#00aaaa',

  String color = "#aaaaaa";

  List<String> activeBreakpoints = [];

  AppComponent(this.mqService) {}

  ngOnInit() {
    mqService.register(min300, minWidth: 300);
    mqService.registerStringQuery(min600, '(min-width: 600px)');

  min300(bool matches) {
    if (matches) {
      color = colors['min300'];
    } else {
      color = colors['default'];


  min600(bool matches) {
    if (matches) {
      color = colors['min600'];
    } else {
      color = colors['min300'];


Use this package as a library

1. Depend on it

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

  jb_responsive_breakpoints: ^5.0.0

2. Install it

You can install packages from the command line:

with pub:

$ pub get

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

3. Import it

Now in your Dart code, you can use:

import 'package:jb_responsive_breakpoints/jb_responsive_breakpoints.dart';
Version Uploaded Documentation Archive
5.0.0 Jan 25, 2018 Go to the documentation of jb_responsive_breakpoints 5.0.0 Download jb_responsive_breakpoints 5.0.0 archive
4.0.3 Jan 18, 2018 Go to the documentation of jb_responsive_breakpoints 4.0.3 Download jb_responsive_breakpoints 4.0.3 archive
4.0.2 Jan 17, 2018 Go to the documentation of jb_responsive_breakpoints 4.0.2 Download jb_responsive_breakpoints 4.0.2 archive
4.0.1 Jan 17, 2018 Go to the documentation of jb_responsive_breakpoints 4.0.1 Download jb_responsive_breakpoints 4.0.1 archive
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The package version is not analyzed, because it does not support Dart 2. Until this is resolved, the package will receive a health and maintenance score of 0.

Analysis issues and suggestions

Support Dart 2 in pubspec.yaml.

The SDK constraint in pubspec.yaml doesn't allow the Dart 2.0.0 release. For information about upgrading it to be Dart 2 compatible, please see https://www.dartlang.org/dart-2#migration.

Maintenance issues and suggestions

Running dartdoc failed. (-10 points)

Make sure dartdoc runs without any issues.


Package Constraint Resolved Available
Direct dependencies
Dart SDK >=1.24.0 <2.0.0