Why does Sentry load 4 about:blank pages?

[kevinrenskers]

I started a completely blank SvelteKit project, by using npm create svelte@latest my-app and choosing the skeleton option.

The only change I made is adding this code to hooks.client.ts:

import * as SentrySvelte from "@sentry/svelte";

SentrySvelte.init({
  dsn: "https://my_dsn_here",
});

And now I can see 4 requests getting made to about:blank, and I just can't figure out why this is happening. It seems to only happen in Safari, or at least it's the only browser that shows these in the network inspector.

It's not a huge deal of course, but I just can't figure out what line of code is causing this. Creating a build of the project and grepping for about:blank doesn't give any results.

[lforst]

If you remove Sentry again do the about:blank calls disappear?

[kevinrenskers]

Yes

[lforst]

I don't know what might cause this. The SDK definitely doesn't load these pages intentionally. It might be something SvelteKit internal that does this. Maybe you can ask there if they know the cause.

[kevinrenskers]

Done: sveltejs/kit#9262. Thanks.

[lforst]

Awesome thank you! I am curious myself what might cause this.