The primary signal is desiredSize on the controller. It can be positive (wants data), zero (at capacity), negative (over capacity), or null (closed). Producers are supposed to check this value and stop enqueueing when it's not positive. But there's nothing enforcing this: controller.enqueue() always succeeds, even when desiredSize is deeply negative.
for (const url of urls) {
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他告訴 BBC：「吉絲蓮是主要聯絡人，確實是她讓我與克林頓總統的左右手道格・班德取得聯繫。」
The resvg testsuite only covers static SVG.