How do you call a .NET function from JavaScript using JavaScript Interop?
There are two methods to call a method from JavaScript: DotNet.invokeMethod DotNet.invokeMethodAsync The syntax of calling a C# method from JavaScript is as follows. Add the .NET function invoke statement to a script in the head of Pages/_Host.cshtml file. Here we are defining a JavaScript function “CSMethod”. This function will have a callback to our .NET function “CSCallBackMethod” which is defined in index.razor. To invoke C# method from JavaScript, The method must be decorated with “JSInvokable” attribute. The method must be public. The method may either be static or instance-level (this is only supported by Blazor 0.5.0 and above). The Identifier for the method must be unique. The method must be nongeneric. Reference LinkReference link https://www.freecodecamp.org/news/how-to-implement-javascript-interop-in-blazor-9f91d263ec51/
How do you render a Blazor page after the parameter is updated?
Blazor updates the UI every time a parameter updates. Invoking an external StateHasChanged() might be required when updating parameters as a result of any async operation. [Counter.razor] StateHasChanged tells Blazor to update the UI when it is called. https://stackoverflow.com/questions/55809117/blazor-page-not-rerendering-after-parameter-updated
How do you call a JavaScript function from .NET using JavaScript Interop?
In Blazor, IJSRuntime interface is used to invoke a JavaScript function from .NET. Using the InvokeAsync<T> method of IJSRuntime abstraction, we can call the JavaScript function. This method takes the function name and function parameters as the argument. The JavaScript function should always be written in the index.html file. Open the wwwroot/index.html file and put in the following code. Open JSInterop.cshtmland put in the following code. The method CallJSMethod will call JS function JSMethod by using the JSRuntime.InvokeAsync method. Important notes Do not write your JS code in the .cshtml file. This is not allowed in Blazor and the compiler will throw an error. Always put your JS code in the wwwroot/index.html file. Always add your custom <script> tag after “<script src=”_framework/blazor.webassembly.js”> </script>” in the <body> section of the index.html file. This is to ensure that your custom script will execute after loading the “blazor.webassembly.js” script. Reference link https://www.freecodecamp.org/news/how-to-implement-javascript-interop-in-blazor-9f91d263ec51/
Does ASP.NET Core Blazor work in the Internet Explorer (IE) browser?
WebAssembly is not supported in the IE browser, so client-side Blazor is not supported in IE. But server-side Blazor can be used instead in IE 11 with polyfills. For more information on browser compatibility, check this link.
Will Blazor be unsupported on outdated browsers that lack WebAssembly support?
Yes, Blazor client-side applications will not be supported on outdated browsers that lack WebAssembly support.