Index
@page "/"
@inject IJSRuntime js
<input type="checkbox" @bind="isGranted" /> Some Permission
@(isGranted?"granted":"not granted")
@code {
bool isGranted;
protected override async Task OnInitAsync() {
await js.InvokeAsync<object>(
"foo.bar",
DotNetObjectRef.Create(this),
nameof(BarCallback)
);
}
[JSInvokable]
public void BarCallback(bool result) {
Console.WriteLine($"BarCallback(result: {result})");
isGranted = result;
}
protected override bool ShouldRender() {
Console.WriteLine("Blazor is checking for re-rendering...");
return true;
}
}
namespace BlazorFiddleProject
{
using Microsoft.AspNetCore.Components.Builder;
using Microsoft.Extensions.DependencyInjection;
public class Startup
{
public void ConfigureServices(IServiceCollection services)
{
}
public void Configure(IComponentsApplicationBuilder app)
{
app.AddComponent<App>("app");
}
}
}
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<meta name="viewport" content="width=device-width">
<title>BlazorFiddleProject</title>
<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">
<style>
app { }
</style>
<script type="text/javascript">
</script>
</head>
<body>
<app>Loading...</app>
<script src="_framework/blazor.webassembly.js"></script>
<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>
<script>
window.foo = {
bar: (dotnetObjRef, callback) => {
navigator.storage.persist()
.then(result => {
dotnetObjRef.invokeMethodAsync(callback, result)
.catch(reason => console.warn('Failed to call .NET method.', reason));
})
.catch(reason => console.warn('Failed to get permission.', reason));
}
}
</script>
</body>
</html>
Add component
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