Calling javascript on blazor server side

Question

How can i call javascript in a blazor server application? I am trying to follow this document

http://www.binaryintellect.net/articles/aede436b-4c57-4551-a7b4-a005f2aed499.aspx

On my ui.razor file i created the following code

@inject IJSRuntime JsRuntime;
...
private async void callWidgetApplication()
{
    var fetched = await JSRuntime.InvokeAsync<bool>("fetchComponenent", DotNetObjectReference.Create(this));
}

I create a file on my wwwroot call Widget.js. this is what i have for the moment

function fetchComponenent() {
    return true;
}

But i keep getting an error on my invokeasync.

CS1503  Argument 2: cannot convert from 'Microsoft.JSInterop.DotNetObjectReference<InfoAccessBlz.Pages.InfoAccess>' to 'object?[]?'

The whole reason in using javascript is to call an other website using ajax. So maybe if there is a better way, this is not an api, but its to retrieve an html site.

Itachi Uchiha · Accepted Answer · 2021-08-05 17:53:29Z

1

 await JsRuntime.InvokeVoidAsync("fetchComponenent");

Your JavaScript Function doesn't accept any parameter and add the JavaScript file to the _Host.cshtml like this

<script src="~/Widget.js"></script>

edited Aug 5, 2021 at 17:53

answered Aug 5, 2021 at 17:48

Itachi Uchiha

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