Flutter web load html

Flutter is a popular UI toolkit for developing mobile, web, and desktop applications. While the framework offers excellent support for creating beautiful and functional user interfaces, it may not have built-in features for displaying web content like HTML. However, with some additional packages, developers can add support for loading HTML content within their Flutter web applications.

Using the webview_flutter Package

The webview_flutter package can be used to load HTML web content in Flutter web applications. This package provides a WebView widget that can be embedded in a Flutter widget hierarchy to display web content.

Installation

To use the webview_flutter package, add it to the dependencies section of the pubspec.yaml file:

dependencies:
  flutter:
    sdk: flutter
  webview_flutter: ^2.0.13

After adding the package to your pubspec.yaml file, run flutter pub get to download and install the package.

Usage

To use the WebView widget, import the package and add it to your widget hierarchy. Here's an example of how to use WebView to load an HTML web page:

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

class MyWebView extends StatefulWidget {
  @override
  _MyWebViewState createState() => _MyWebViewState();
}

class _MyWebViewState extends State<MyWebView> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('My Web Page'),
      ),
      body: WebView(
        initialUrl: 'https://www.example.com',
        javascriptMode: JavascriptMode.unrestricted,
      ),
    );
  }
}

This code creates a stateful widget that displays a WebView in the body of the Scaffold. The initialUrl specifies the web page to load in the WebView, and the javascriptMode property is set to JavascriptMode.unrestricted to enable JavaScript on the web page.

Handling Navigation Events

WebView emits events whenever the user navigates to a new URL or tries to interact with the web page. Developers can listen to these events using WebView's NavigationDelegate property. For example, here's how to log navigation events:

class _MyWebViewState extends State<MyWebView> {
  final Completer<WebViewController> _controller =
      Completer<WebViewController>();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('My Web Page'),
      ),
      body: WebView(
        initialUrl: 'https://www.example.com',
        javascriptMode: JavascriptMode.unrestricted,
        onWebViewCreated: (WebViewController webViewController) {
          _controller.complete(webViewController);
        },
        navigationDelegate: (NavigationRequest request) {
          print('Navigating to ${request.url}');
          return NavigationDecision.navigate;
        },
      ),
    );
  }
}

This code creates a Completer object to wait for the WebView controller to be created. The onWebViewCreated callback is used to assign the controller instance to the _controller variable. The navigationDelegate callback handles navigation events and logs the URL of the requested web page.

Conclusion

Flutter web is an exciting technology that allows developers to create beautiful and functional web applications using Flutter. While Flutter does not provide built-in support for displaying HTML web content, developers can use the webview_flutter package to add this functionality.

The packages' API is well documented and would improve any project's web experience. The package would also work with mobile applications and not only great for web applications. With the package, developers can create hybrid apps with HTML and Flutter all in one with just a few steps.