Async Clipboard: Read and Write Images

Category: User input
Type: New or changed feature
Status: Enabled by default (Chrome 76)
Intent stage: Prepare to ship

Summary

Implements programmatic copying and pasting of images for the Async Clipboard API. This change also updates navigator.clipboard.read() and navigator.clipboard.write() to comply with the specification. Programmatic copying and pasting of images is Chromium's top starred bug.

Standards & signals

Specification: https://w3c.github.io/clipboard-apis/#async-clipboard-api
Firefox: No signal
Safari: Shipped/Shipping
Web developers: Strongly positive — The Chrome bug has over 1800 stars, making it the highest-starred bug at the time the feature is launched.
Tracking bug: https://crbug.com/150835

Docs: https://web.dev/async-clipboard/

Explainers: https://docs.google.com/document/d/1lpi3-9vBP_1b7hZc2xBs0s_HaACJ6UigZZqHlJSNeJg/ https://docs.google.com/document/d/1sMcajoYAQ_M_VOIn1RLokG1sVB7skjoeviqt9aZOcDk/

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