To use BitBswup, please follow these steps:

1. Install the Bit.Bswup nuget package
2. Disable static file caching.You can follow below code in Startup.cs file

app.UseStaticFiles(new StaticFileOptions
{
    OnPrepareResponse = ctx =>
    {
        ctx.Context.Response.GetTypedHeaders().CacheControl = new CacheControlHeaderValue()
        {
            NoCache = true
        };
    }
});

4. In the default document (_Host.cshtml, index.html or _Layout.cshtml), add an autostart = "false" attribute and value to the <script> tag for the Blazor script.

<script src="_framework/blazor.webassembly.js" autostart="false"></script>

5. In the default document (_Host.cshtml, index.html or _Layout.cshtml), add the Bit.Bswup reference after the <script> tag for the Blazor script.

<script src="_content/Bit.Bswup/bit-bswup.js"
        scope="/"
        log="verbose"
        sw="service-worker.js"
        handler="bitBswupHandler"></script>

• scope: The scope of the service worker determines which files the service worker controls. You need more about that read it.
• log: The log level for log provider. log options: info, verbose, debug, error
• sw: The sw is name and path service worker file.
• handler: The name of handler for the service worker events

You can not specify the values of the attributes, and use the default values which are equal to the above values.

6. Add a handler in the simplest way possible, like the below code. or you can add a handler with a progress process bar like the bitBswupHandler on the sample in the index.html file of the demo project in this repo.

function bitBswupHandler(type, data) {
    switch (type)
    {
        case 'updatefound':
            return console.log('new version is downloading...');
        case 'statechange':
            return console.log('new version state has changed to:', data.currentTarget.state);
        case 'controllerchange':
            return console.log('sw controller changed:', data);
        case 'installing':
            return console.log('installing new version:', data.version);
        case 'installed':
            console.log('new version installed:', data.version)
            data.reload();
            return;
        case 'progress':
            return console.log('asset downloaded:', data);
        case 'activate':
            return console.log('new version activated:', data.version);
    }
}

7. Configure additional settings in the service worker file (based on the sample shown in the service-worker.js file of the demo project)

• self.assetsInclude: The list of files or regex of files to be cached.
• self.assetsExclude: The list of files or regex of files that should not be cached.
• self.defaultUrl: The default page url. Use / for _Host.cshtml
• self.prohibitedUrls: The list of files or regex of files that should not be accessed.
• self.assetsUrl: The url address of service worker assets.
• self.externalAssets: The list of external assets. If you're not using index.html for default url, then you should add this { "url": "/" } item.
• self.caseInsensitiveUrl: If set true you can check case insensitive url in the cache process.
• self.serverHandledUrls: The list of urls or regex that do not enter the service worker process. ex. api, swagger, ...
• self.serverRenderedUrls: The list of urls or regex that should be cached by the server after rendering. ex. about.html