whatwg/html

createImageBitmap's note is wrong

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#3,552 opened on Mar 10, 2018

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good first issuetopic: canvas

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

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
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.
createImageBitmap's note is wrong · whatwg/html#3552 | Good First Issue