data-turbo-preview never added to html element

[SleeplessByte]

Version: .beta5

if (isPreview) {
  this.element.setAttribute("data-turbo-preview", "");
} else {
  this.element.removeAttribute("data-turbo-preview");
}

I've put a breakpoint at the first statement. When there is a page cached, I can see two renders:

1. when the page starts navigating, this would be the preview, but isPreview is false
2. when the page finishes navigating (after the progress bar + network request), and isPreview is false (as expected).

From the code, I think this is a bug, or I have missed additional instructions to enable the preview.

• No no-preview set (I would not expect the first render to begin with)
• No other options set via data-attributes. Just regular turbo-driven link to a cached page.

Is there anything I can provide to aid with determining what the issue is?

[SleeplessByte]

Tracked by hotwired/turbo#159; should be fixed by hotwired/turbo#162 and hotwired/turbo#169.

This issue can be closed when released.

[dhh]

Closing as its tracked at the source.