To ensure a smooth user experience, developers should follow these Development Best Practices from Microsoft Runtime Detection
While the binaries are shared globally, the runtime forces your app to specify a unique User Data Folder (UDF) . This ensures that your app’s cookies, local storage, and cache remain strictly isolated from Microsoft Edge and other third-party apps using WebView2. Implementing Evergreen WebView2: Best Practices
[Native Desktop App] │ ▼ 1. Checks Registry/System for Evergreen Runtime │ ├───► Found? ───► 2. Launches Chromium Processes (Independent Setup) │ └───► Missing? ─► 3. Triggers Bootstrapper / Prompt to Download
Pin the runtime to specific enterprise-safe updates. evergreen webview2
| Feature | Evergreen Bootstrapper | Evergreen Standalone | Fixed Version | | :--- | :--- | :--- | :--- | | | Small (~2MB) | Large (~120MB) | Large (Self-managed) | | Internet Required? | Yes (to download runtime) | No | No | | Updates | Automatic (via Windows Update) | Automatic (via Windows Update) | Manual (Developer controls) | | Target Audience | Consumer Apps, Web Download | Enterprise, Offline Machines | Strict Environment Control |
Microsoft pushes updates directly to the client machine independently of your application.
The mode is the recommended default for most applications because it reduces the developer’s burden to ship security updates and ensures users always have a compliant, up-to-date web platform. To ensure a smooth user experience, developers should
Here is a comprehensive look at how Evergreen WebView2 works, why it is the preferred choice for most modern applications, and how to implement it effectively. 1. What is Evergreen WebView2?
, which includes the full runtime for environments without internet access. MSIX/App Installer
Keep your native desktop code (C#, C++, Electron, etc.) strictly separated from your frontend web code. Use secure communication bridges like PostWebMessageAsJson and window.chrome.webview.addEventListener to pass data safely. ─► 3
Software vendors package a specific, immutable version of the Chromium binaries directly within their application installer.
Choosing the Evergreen model over the Fixed Version model offers distinct architectural and operational advantages for enterprise and consumer software alike. 1. Minimal Application Footprint
Postpone Evergreen runtime updates for a specific window to allow internal QA testing.
If the runtime isn't found, you can trigger a "Bootstrapper" during your app's installation. This is a tiny file that downloads and installs the correct runtime for the user’s architecture (x64, ARM, etc.) automatically. Evergreen vs. Fixed Version: Which is right for you?
The Evergreen WebView2 model represents a best-in-class solution for embedding web content in Windows desktop applications. By shifting runtime management to the operating system and Microsoft’s update infrastructure, developers gain security, reliability, and reduced app complexity. While not suitable for all offline or locked-down environments, Evergreen is the correct default choice for most modern Windows applications needing a web view.