Flutter For Web An Ultimate Guide on Flutter Web Development Along with Demo

Google’s UI library- Flutter, was initially developed to build native performant mobile applications. Nonetheless, Flutter isn’t limited to just mobile applications; it has been working proactively to use the single codebase for iOS, Android, and Desktop. Are you passionate about Web Development? You should definitely try out Flutter for Web then!

In this guide, we will learn about Flutter for Web and build a small demo for the same. Without further ado, let’s get started with Flutter Web development!

What is Flutter for Web?

  • Flutter’s web support helps you develop complex standalone web applications, graphically rich and interactive content to reach end-users on a broad variety of devices.
  • Flutter for Web support offers a delivery model based on browsers for the existing Flutter mobile applications.

How does Flutter for Web work?

  • Flutter renders web apps the same way as it will render your android/iOS apps, i.e., Flutter Web will convert your project to native code (HTML, CSS, JS) when you wish to deploy. Now, keep in mind that Flutter Web creates Single Page Web Applications! You can definitely have multi-pages, but when the Flutter framework converts the web app into the native language, there will only be one HTML file, i.e., index.html.
  • So how do we have multiple pages? The answer to this question is pretty simple. If we have a closer look at how Navigator works, we will observe that it works on the Stack data structure. Hence, Flutter for Web is a single page, but it pushes multiple pages on that same single native page.
How does Flutter for Web work

How is the performance for Flutter Web, and how is it different?

  • Flutter Web works pretty smooth compared to native as it creates only a single-page application and hence creates less load on the browser. Though we can say that Flutter Web is improving, its performance is not upto the mark.
  • With Flutter, you can create some great animations very easily compared to native, hence making your web app more beautiful.
  • Flutter Web directly supports installing your website as a standalone application (Web-App) for which you need to code, if in native, separately.
  • Flutter, as it is a cross-platform framework, can add some platform-specific code without any configuration changes.

How to run your existing project on Flutter Web?

  • Flutter Web is now on the stable channel from Flutter 2.0!
  • Nevertheless, if you are not working on Flutter 2.0, you can still use it by running the below commands:
flutter channel beta
flutter upgrade
flutter config --enable-web
flutter create .
  • If you are already on Flutter 2.0 but have never run your old project on the Web, you can run the following set of commands:
flutter config --enable-web
flutter create .
  • Once the commands are successfully executed, your project is ready to set fire on the Web! You will be able to see a Web folder in your project directory.
  • Now, to run your project on the Web, simply select Chrome or Edge as your device and click Run.

How to create a new app with Web support?

  • When we create our new project with Flutter 2.0, web support is already enabled with new projects.
  • But if, for some reason, it’s not enabled, you can run the following commands:
flutter config --enable-web
flutter create .
  • Now Web has been enabled in your project, and you can run it directly.

Some key points you must consider when using Flutter Web!

When you are working with Flutter Web, you need to keep few points in mind:

  • Flutter Web creates a Single Page App!
  • As users can open your website in any screen size now, you need to make it responsive.
  • Many packages support the web, but always check the supported platforms before coding.
  • If you are from a web development background and if you feel like making any changes in native code, you are highly welcomed to do so. You can change the native code the same way we can change it for Android and iOS.
  • When you want to deploy your web app, you can simply run:
flutter build web

And you will get a folder web in your project directory that contains native codes, including index.html

Tips and Tricks to make your web app responsive!

  • The best way to make your web app responsive is to use MediaQuery to get the height and width of the screen, and based on that; you can assign font size.
  • Many other packages help you to make your app responsive. Some of the most useful packages are

responsive_framework
flutter_screenutil

Let’s make a small responsive web app for all screen sizes.

  • Create a new project and delete all code available in main.dart
  • Paste the following code in main.dart:
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Material App',
      home: HomePage(),
    );
  }
}
class HomePage extends StatefulWidget {
  const HomePage({Key? key}) : super(key: key);
@override
  _HomePageState createState() => _HomePageState();
}
class _HomePageState extends State<HomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Container(
        height: MediaQuery.of(context).size.height - 100.0,
        width: MediaQuery.of(context).size.width - 100.0,
        color: Colors.orange,
        child: Text(
          'Responsive Text',
          style: TextStyle(fontSize: MediaQuery.of(context).size.width / 10),
        ),
      ),
    );
  }
}
  • The code is pretty simple. There’s one Container whose height and width are being maintained using MediaQuery. We have Text as its child whose fontSize is maintained using MediaQuery. Now, you can check whether this project is responsive or not by simply increasing and decreasing the size of your browser!

You can find the entire source code, clone the Github Repository and run it on your system.

Conclusion

  • Flutter for Web Apps are Single Page Apps.
  • Flutter renders web apps the same as it renders Flutter Android or iOS apps by converting dart code into native code.
  • We need to check whether a particular package has Web Support before using it in our project.
  • Always make your Web App responsive as users can open it in any screen size.

Bacancy has dedicated and enthusiastic Flutter developers enriched with fundamental and advanced knowledge. If you’re looking for a helping hand for your Flutter application, contact us for profound Flutter Web Development Services.

Frequently Asked Questions (FAQs)

What are the advantages of Flutter Web?

Here are the advantages of Flutter for Web:

  • Single codebase for Mobile and Web
  • Supports PWA
  • Widgets are supported for the Web
  • Reduced Cost
  • Adaptive Layouts
  • Improved Time to Market
What are the disadvantages of Flutter Web?

Here are some disadvantages of Flutter for Web:

  • Not SEO friendly
  • Small community
  • CanvasKit initial load is large
  • Performance not as expected
  • Weak Debugging
Is Flutter good for web development?

Of course, it is! Flutter is great for both- mobile and web application development because of its compatibility with current-generation web rendered on technologies like – HTML, CSS, and JS. With the help of Flutter, you can easily compile the existing code into client experience, embed it to the browser, and later deploy it.

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