Problem: You are building an installer for a remote oil rig with no internet. Evergreen requires a one-time download. Solution: Use the Bootstrapper with a local cache, or pre-install the Evergreen runtime via the official Microsoft linked EXE (available via the Visual Studio workload or direct download).
The Evergreen WebView2 Runtime is the recommended distribution model for embedding modern web content into Windows applications. Unlike traditional "Fixed Version" models that bundle a specific static engine, the Evergreen model uses a self-updating system maintained by Microsoft, ensuring your app always runs on the latest Chromium-based rendering engine. Core Architecture and Distribution
The Evergreen Runtime acts as a shared system component. In the Evergreen distribution mode, the runtime is not packaged directly with your application. Instead:
System Integration: It is pre-installed on Windows 11 and pushed to eligible Windows 10 devices through Microsoft 365 Apps.
Shared Footprint: Because multiple apps share a single Evergreen installation, it significantly reduces the disk footprint on the user's machine compared to bundling separate engines for each app.
Automated Maintenance: Microsoft manages the updates, delivering the latest security patches, bug fixes, and web standard updates (typically aligning with Microsoft Edge Stable channel releases). Performance and Security Advantages
Choosing Evergreen is often considered a "future-proofing" move for developers.
Security: Applications automatically receive the latest security improvements without requiring the developer to release a new version of the app.
Optimization: Newer versions of the runtime frequently address legacy issues like memory leaks and high CPU usage.
Feature Access: Developers can use the latest WebView2 APIs from the most recent SDK, knowing the underlying runtime will support them. Implementation Best Practices
While the Evergreen model simplifies maintenance, it introduces specific responsibilities for developers: Distribute your app and the WebView2 Runtime
In the context of modern Windows application development, the Evergreen WebView2 Runtime is the default and recommended distribution model for embedding web content into native apps. 🌐 What is Evergreen WebView2?
The "Evergreen" mode refers to a runtime that updates automatically via Microsoft Edge's update cycle. Unlike the "Fixed Version," which requires developers to package and manually update specific binaries with their app, the Evergreen version ensures:
Security: Users always have the latest patches without developer intervention.
Efficiency: Multiple apps share a single runtime on the device, saving disk space.
Performance: On modern systems, binaries are hard-linked with Microsoft Edge to reduce memory footprint. 🛠️ Key Technical Concepts
If you are writing a post or developing an app, keep these mechanics in mind:
Distribution: You can deploy it using a tiny Evergreen Bootstrapper (which downloads the runtime on the fly) or an Evergreen Standalone Installer for offline environments.
Versioning: Your app's SDK version should be compatible with the runtime version. It is best practice to use feature detection (checking if an API exists) rather than assuming a specific version is present.
Initialization: To ensure a smooth experience, apps should programmatically check for the runtime's presence before attempting to load a WebView2 control. evergreen webview2
Breaking Changes: While rare, automatic updates can occasionally cause issues. Developers are encouraged to test their apps against Microsoft Edge Preview channels (Beta, Dev, or Canary) to catch upcoming changes. ⚠️ Common Hurdles
Legacy Systems: Support for older operating systems like Windows 7 or Server 2012 R2 has ended, and newer evergreen versions may fail to install on these platforms.
Update Handling: When an update occurs while an app is running, the app continues using the old version until it is restarted or all WebView2 objects are released.
Uninstallation: Because many core Windows apps (like Teams) now rely on it, the WebView2 runtime often reinstalls itself if manually removed by a user.
Why was WebView2 re-installed after I uninstalled it? - Microsoft Q&A
What is Evergreen WebView2?
Evergreen WebView2 is a runtime environment that allows developers to embed a modern web browser, specifically Microsoft Edge, into their desktop applications. This enables the use of web technologies such as HTML, CSS, and JavaScript to build desktop applications.
Key Features:
Interesting Review:
Here's an interesting review of Evergreen WebView2:
Pros:
Cons:
Use Cases:
Evergreen WebView2 is suitable for various use cases, including:
Overall, Evergreen WebView2 offers an exciting opportunity for developers to build desktop applications using web technologies, with the benefits of a seamless, evergreen browser integration.
Would you like to know more about Evergreen WebView2 or is there a specific aspect you'd like me to expand on?
Evergreen WebView2 is a distribution mode that allows your application to use a shared, automatically updated runtime
. Unlike the "Fixed Version" mode, Evergreen ensures your app always has the latest security patches, web features, and performance improvements without requiring you to manually push updates. Microsoft Learn 🚀 Why Use Evergreen? Zero Maintenance:
Updates are handled by Microsoft, similar to how the Edge browser updates. Disk Efficiency: Problem: You are building an installer for a
Multiple apps share the same runtime binaries, significantly reducing the storage footprint compared to packaging a dedicated browser for every app.
Critical security vulnerabilities are patched automatically, reducing the risk for your end users. OS Integrated:
It is pre-installed on Windows 11 and recent versions of Windows 10. Microsoft Learn 🛠️ Implementation Steps 1. Set Up the Environment
Distribute your app and the WebView2 Runtime - Microsoft Learn
Demystifying Evergreen WebView2: The Modern Standard for Windows Hybrid Apps
Evergreen WebView2 is a control component from Microsoft that allows developers to embed modern web content (HTML, CSS, and JavaScript) directly into native Windows applications. Unlike traditional "Fixed Version" distributions that bundle a specific browser version with the app, the Evergreen model ensures the underlying web platform is always up-to-date and shared across all applications on a device. 🚀 Key Benefits of the Evergreen Model
Choosing the Evergreen distribution is the recommended path for most modern Windows applications.
Zero-Maintenance Security: Microsoft automatically handles security patches and feature updates, ensuring your app runs on the most secure version of Chromium.
Reduced Disk Footprint: Multiple apps share a single Evergreen WebView2 Runtime installation rather than each bundling a 300MB+ browser engine.
Performance Optimization: On supported systems, the Evergreen Runtime binaries are hard-linked with Microsoft Edge, optimizing both memory usage and disk space.
Broad Compatibility: It provides a modern web view across Windows versions, from Windows 7 through Windows 11. 🛠️ Distribution and Deployment Options
For developers looking to integrate the Evergreen Runtime, there are three primary ways to ensure users have what they need: Announcing Microsoft Edge WebView2 General Availability
A common pain point for developers is handling the scenario where a user does not have the WebView2 Runtime installed.
Best Practice Strategy: Do not assume the runtime exists. Your installer should handle the dependency.
The Evergreen runtime installs to %LocalAppData% for the current user or Program Files for machine-wide. If a user has strict applocker policies, the installation may fail. Test on locked-down environments.
Imagine ten applications on a single machine, all using WebView2. With Evergreen, the runtime is installed once. With Fixed Version, you’re wasting nearly 2 GB of disk space. For enterprise IT, this is non-negotiable.
Recommended for:
Not recommended for:
Final thoughts:
The Evergreen WebView2 is the most pragmatic embedded browser on Windows today. It trades a small dependency (runtime must exist) for massive update savings. If your users have Windows 11, the runtime is already preinstalled. For Windows 10, the bootstrapper is painless. Just remember to test with await EnsureCoreWebView2Async() and handle the case where the runtime is missing. options: new CoreWebView2EnvironmentOptions()
)
Bottom line: Use it unless you’re building for a disconnected bunker.
The Evergreen WebView2 Runtime is Microsoft's recommended distribution mode for embedding web technologies into native applications. Unlike the "Fixed Version," the Evergreen runtime is shared across all applications on a device and updates automatically via Microsoft Edge, ensuring applications always have the latest security patches and features. Core Functionality & Architecture
Rendering Engine: Uses Microsoft Edge (Chromium-based) to render HTML, CSS, and JavaScript within native apps.
Process Sharing: WebView2 instances share browser, network, and GPU processes, which optimizes system resources.
Automatic Updates: The runtime is managed by the Microsoft Edge update service, requiring no manual intervention from developers once installed. Distribution & Deployment
Developers typically ensure the runtime is present on client machines through several methods:
Evergreen Bootstrapper: A small (~2MB) executable that downloads the correct runtime architecture (x86, x64, or ARM64) on-demand.
Evergreen Standalone Installer: A full installer containing all binaries, suitable for offline deployment or strictly controlled environments.
Chain Installation: Runtimes can be "chained" into application installers using tools like WiX Burn Bundle or Visual Studio Installer Projects. Key Advantages
Security: Regular, automated updates minimize exposure to known vulnerabilities.
Efficiency: Reduces disk footprint by sharing one copy of the runtime across multiple apps on a single system.
Compatibility: Apps can use the latest WebView2 APIs from the current WebView2 SDK without repackaging the app. Maintenance & Troubleshooting
While automated, certain issues may arise requiring manual intervention:
Repairing: If an app fails to initialize (e.g., throwing a COMException), users can repair the runtime via the "Add or remove programs" menu in Windows.
Forward-Compatibility Testing: Microsoft recommends developers test their apps against Edge preview channels (Canary, Dev, or Beta) to ensure future runtime updates don't break existing functionality.
Detection: Apps should programmatically check for the runtime's existence using the GetAvailableBrowserVersionString method before attempting to initialize a WebView instance. Comparison at a Glance Evergreen Runtime (Recommended) Fixed Version Runtime Update Management Automatic via Microsoft Manual by Developer Disk Footprint Shared (Smaller) Per-app (Larger) Security Always current Developer responsibility Best For Most general applications Apps with strict compatibility needs
Evergreen webView2 runtime compatability issue? #2210 - GitHub
Since "full article" implies a comprehensive guide, I have structured this as a complete technical overview covering what the Evergreen WebView2 Runtime is, how the installer works, deployment strategies, and the differences between the Bootstrapper and the Standalone Installer.
await CoreWebView2Environment.CreateAsync( browserExecutableFolder: null, // null = use Evergreen system runtime userDataFolder: "C:\\AppData\\MyApp\\WebView2", options: new CoreWebView2EnvironmentOptions() );
// Check runtime availability string version = CoreWebView2Environment.GetAvailableBrowserVersionString(); if (version == null) // Launch bootstrapper from https://go.microsoft.com/fwlink/p/?LinkId=2124703 var installer = new WebView2RuntimeInstaller(); await installer.InstallEvergreenRuntimeAsync();
The Evergreen runtime is located automatically by the WebView2 loader.