Blazor: Provide common callback mechanism for when Blazor starts

Is your feature request related to a problem? Please describe.

We can currently set autostart=“false” on the the Blazor <script> tag and then use the JavaScript Blazor.start({}).then(.........) to execute JavaScript we need to run as soon as Blazor starts.

Using this approach is not suitable for library developers, because Blazor.start can only be called once.

Describe the solution you’d like

Please provide a new Blazor.onStarted function that accepts a callback to execute once Blazor has started. It should be possible to call this function more than once so many scripts can be notified. If Blazor has already started, the callback should be executed immediately.

Or

Allow us to call Blazor.start() without any parameters which will complete the promise when Blazor has finished starting up, or immediately if it has already initialized.

[analogrelay]

This is the bug I mentioned in Teams earlier that is fixed. The Needs: Author Feedback label was applied but not properly removed when @mrpmorris responded. It’s all fixed now.

[javiercn]

@anurse can you take a look? The bot is doing bot things 😵