Why ReconnectModal.razor.js is loaded twice ?

[tossnet]

Hello,
when I create a new Blazor Web App project (server and global) and without making any changes, I publish it and notice that the file ReconnectModal.xxxxxxxxxxxx.razor.js is present twice.
Can anyone explain this to me? thanks

[engineering87]

Hello @tossnet,
this is expected, with a Blazor Web App using Server interactivity and prerendering, the page is rendered once on the server and again when interactivity boots, so you observe double work loads. If you want to avoid that, disable prerendering for the component or page, like @rendermode @(new InteractiveServerRenderMode(prerender: false))