[1] [CITE[Bug 49141 – use data uri instead of webkit-fake-url for contentEditable]]
( ([TIME[2013-06-21 05:33:33 +09:00]] 版))
<https://bugs.webkit.org/show_bug.cgi?id=49141>

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[2] [CITE[Clipboard API Improvements | WebKit]]
([TIME[2018-03-23 02:11:33 +09:00]])
<https://webkit.org/blog/8170/clipboard-api-improvements/>
]FIGCAPTION]

> Previously, sub-resources (such as image files in pasted content) used URLs of the form webkit-fake-url://<filename> where <filename> is the filename of the sub-resource. Because this is not a standard protocol the website can access, the pasted images’ data were inaccessible to websites. 

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