whatwg/html

createImageBitmap's note is wrong

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#3,552 opened on Mar 10, 2018

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 (4 comments) (0 reactions) (0 assignees)HTML (2,520 forks)batch import
good first issuetopic: canvas

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Description

https://html.spec.whatwg.org/multipage/imagebitmap-and-animations.html#images-2:dom-createimagebitmap

Rejects the promise with a "SecurityError" DOMException if the script is not allowed to access the image data of the source image (e.g. a video that is CORS-cross-origin, or a canvas being drawn on by a script in a worker from another origin).

Creating Bitmap image from CORS-cross-origin source shouldn't be an issue. Especially there's a origin-clean logic in createImageBitmap

Contributor guide

Research direction
Review the spec section at the linked URL. Investigate the origin clean logic in createImageBitmap to verify that the note is incorrect. Propose a fix to the note by submitting a PR to the whatwg/html repository.
Tech stack
html
Domain
documentation
Issue type
Documentation
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Under 1 hour
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
CORS conceptHTML spec understanding
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
80