Description

The amp-tiktok docs state:

Avoiding Layout shift

Prevent layout shift by matching the width and height attributes on the amp-tiktok element to the size of the video player.

By default, the width of the amp-tiktok iframe is 325px, resulting in a hight of roughly 575px. The default height of the embedded TikTok video player depends on the length and content of the TikTok caption. To show the entire video, the amp-tiktok component resizes to match the player height. You can avoid this by defining the width and height to match the video player.

I tried following this advice and obtaining the exact height of the element after the page has loaded:

<amp-tiktok height="721" layout="fixed-height" data-src="https://www.tiktok.com/@countingprimes/video/6988237085899574533"></amp-tiktok>

Nevertheless, there is layout shift that is happening when the video loads:

While the page ends up with the same initial layout, there is a moment when the amp-tiktok grows too tall before shrinking back down.

Reproduction Steps

Try example on AMP Playground.

Relevant Logs

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Browser(s) Affected

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OS(s) Affected

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Device(s) Affected

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AMP Version Affected

2108052321001