The design of Web streams predates async iteration in JavaScript. The for await...of syntax didn't land until ES2018, two years after the Streams Standard was initially finalized. This timing meant the API couldn't initially leverage what would eventually become the idiomatic way to consume asynchronous sequences in JavaScript. Instead, the spec introduced its own reader/writer acquisition model, and that decision rippled through every aspect of the API.
Norfolk Museums Service
，这一点在heLLoword翻译官方下载中也有详细论述
Finding the closest point，详情可参考safew官方版本下载
set pixel as candidate
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