This package provides Blazor applications with access to the browser's Clipboard API

1. In your Blazor app, add the CurrieTechnologies.Razor.Clipboard NuGet package

   Install-Package CurrieTechnologies.Razor.Clipboard

2. In your Blazor app's Startup.cs, register the 'ClipboardService'.

   public void ConfigureServices(IServiceCollection services)
   {
       ...
       services.AddClipboard();
       ...
   }

3. Add this script tag in your root html file (Likely _Host.cshtml for Blazor Server Apps or index.html for Blazor WebAssembly Apps), right under the framework script tag. (i.e <script src="_framework/blazor.server.js"></script> for Blazor Server Apps or <script src="_framework/blazor.webassembly.js"></script> for Blazor WebAssembly Apps)

   <script src="_content/CurrieTechnologies.Razor.Clipboard/clipboard.min.js"></script>

4. Now you can inject the ClipboardService into any Blazor page and use it like this:

   @using CurrieTechnologies.Razor.Clipboard
   @inject ClipboardService clipboard
   
   <input @bind="textValue" />
   <button @onclick="(async e => await clipboard.WriteTextAsync(textValue))">Copy To Clipboard</button>
   <button @onclick="(async e => textValue = await clipboard.ReadTextAsync())">Paste From Clipboard</button>
   
   @code
   {
       string textValue = string.Empty;
   }

* Firefox does support the clipboard API, but in a very restricted way that Blazor doesn't support.

The Clipboard API is a relatively new API and presents some security concerns, so keep these in mind.

1. Clipboard events can only be raised in response to user input.
2. Focus must be on the DOM window. (not the debugger, or another window)
3. The page must be served over HTTPS

Unblocking Clipboard Access

Clipboard API