HTML a element reference: example cannot work, it doesn't allow download #42463
Description
MDN URL
https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements/a
What specific section or headline is this issue about?
Example painting app with save link
What information was incorrect, unhelpful, or incomplete?
'Download my painting' do not work, opening devtools it said:
Download is disallowed. The frame initiating or instantiating the download is sandboxed, but the flag ‘allow-downloads’ is not set. See https://www.chromestatus.com/feature/5706745674465280 for more details. (Edge)
Content-Security-Policy: The page’s settings blocked the loading of a resource (frame-src) at data:image/png;base64,iVBORw0KGgoAAAANSU… because it violates the following directive: “frame-src 'self' https://mdn.github.io/ https://*.mdnplay.dev https://*.mdnyalp.dev https://*.play.test.mdn.allizom.net https://v2.scrimba.com/ https://scrimba.com/ https://jsfiddle.net/ https://www.youtube-nocookie.com/ https://codepen.io/ https://survey.alchemer.com/ https://js.stripe.com/” (Firefox)
What did you expect to see?
'Download my painting' should work
Do you have any supporting links, references, or citations?
No response
Do you have anything more you want to share?
No response
MDN metadata
Page report details
- Folder:
en-us/web/html/reference/elements/a - MDN URL: https://developer.mozilla.org/en-US/docs/Web/HTML/Reference/Elements/a
- GitHub URL: https://github.com/mdn/content/blob/main/files/en-us/web/html/reference/elements/a/index.md
- Last commit: e936e72
- Document last modified: 2025-12-13T02:55:18.000Z