Although Blazor lets programmers create web apps using .NET and C#, there can be situations when they have to engage with current JavaScript libraries or APIs. 

 

Blazor's JavaScript interop features offer a seamless approach to obtain JavaScript compatibility. 

Using the IJSRuntime service, which is injected into Blazor components or services, developers can call JavaScript methods from .NET code. This service lets you call JavaScript functions, send parameters, and get back return values. On the other hand, 

 

Blazor lets JavaScript code call .NET methods. By annotating .NET methods or classes with the [JSInvokable] attribute, developers can make them available to JavaScript. 

JavaScript code running inside the browser can then call these functions. Blazor's JavaScript interop features let developers use current JavaScript libraries, engage with browser APIs, or connect with third-party services offering JavaScript SDKs, all while reaping the benefits of working in the .NET ecosystem.