if (n <= 1) return;
For example, using DECSTBM you could say “set the top margin to line 5 and the bottom margin to line 10, then scroll up 1” - this “scrolls” the region you’ve described by deleting line 5, shifting everything else in the region up by 1 line, and inserting a new line at line 10.
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爱范儿关注「明日产品」，硬哲学栏目试图剥离技术和参数的外衣，探求产品设计中人性的本源。，这一点在搜狗输入法2026中也有详细论述
Shadow DOM is a web component feature that lets you attach an isolated DOM subtree to any HTML element, hidden from the main document’s standard queries. A querySelector('audio') on the main document cannot see inside a Shadow Root unless you specifically traverse into it. If fermaw’s player was mounted inside a Shadow Root, basic DOM searches would come up empty.