Blazor JavaScript Isolation | Blazor JavaScript Interop
🎉In this Blazor JavaScript Isolation Tutorial, we dive deep into Blazor JavaScript Interop to show you how to load a JavaScript module on demand from a Blazor component. This is the essential, modern way to use JavaScript in a Blazor C# app, keeping your code clean, maintainable, and efficient.
📌We'll walk you through the entire process, starting from a new Blazor WebAssembly project. This video is perfect for Blazor developers looking to correctly and cleanly integrate JavaScript functionality without polluting the global namespace.
In this tutorial, you will learn:
✅How to create a dedicated JavaScript module and export functions.
✅How to inject IJSRuntime into your Blazor component.
✅The correct way to import your JS module using import inside the OnAfterRenderAsync lifecycle method.
✅How to store the module reference in an IJSObjectReference.
✅How to call your JavaScript function from C# using InvokeVoidAsync (for example, to show an alert).
✅Why IAsyncDisposable is crucial for cleaning up your JS module reference and preventing memory leaks.
✅The key benefits of Blazor JavaScript Isolation, such as preventing naming conflicts and creating a local scope.
✅The difference in file paths when using a Blazor app vs. a Razor Class Library.
TIMESTAMPS / CHAPTERS:
[00:07] What is Blazor JavaScript Isolation?
[00:21] Creating the Blazor WebAssembly Project
[00:39] Creating the JavaScript Module (my-module.js)
[01:14] Creating the Razor Component
[01:46] Injecting IJSRuntime
[02:45] Importing the Module inside OnAfterRenderAsync
[04:50] Calling the JavaScript Function from C#
[05:17] Disposing the Module with IAsyncDisposable
[05:49] The Benefits of JavaScript Isolation (Namespace & Maintenance)
So, by the end of this video, you will have learned how to implement JavaScript isolation in Blazor JS Interop.
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