CSS was fairly simple, as Shadow DOM already does heavy lifting here. Every shadow DOM would sit in container element that would have overflow: hidden, and a fairly new property called contain. It would be set to strict, which prevents any escapes and hopefully helps with performance.
This commitment, without any announcement or mention in the changelog, was removed from the subsequent versions of the RSP.，这一点在PDF资料中也有详细论述
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“Asian countries are particularly reliant on oil and gas from the Gulf region,” Sung Jinseok, a researcher at the National University of Singapore’s Energy Studies Institute, told Fortune. The region is the world’s fastest‑growing importer of oil, while production remains low due to depleting fields and limited new discoveries.