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Add standalone mode for HTML artifact downloads

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When downloading HTML artifacts, the generated HTML now works standalone
without requiring the extension runtime.

Changes:
- Add PrepareHtmlOptions config object to SandboxedIframe.prepareHtmlDocument()
- Add isStandalone flag to skip runtime bridge and navigation interceptor
- When isStandalone=true:
  - window.sendRuntimeMessage is NOT defined
  - Navigation interceptor is NOT injected
  - Artifact runtime providers fall back to embedded data
- HtmlArtifact download button now uses isStandalone: true

This fixes the issue where downloaded HTML artifacts would:
- Try to call window.sendRuntimeMessage (which would fail silently)
- Try to postMessage to non-existent parent window
- Not work when opened via file:// protocol

Now downloaded artifacts work completely standalone with embedded data.
This commit is contained in:
Mario Zechner 2025-10-12 00:39:26 +02:00
parent 63bfe95c18
commit 26b774bb04
3 changed files with 66 additions and 24 deletions
Download patch file Download diff file Expand all files Collapse all files

5
packages/web-ui/src/tools/artifacts/HtmlArtifact.ts
View file

@ -48,7 +48,10 @@ export class HtmlArtifact extends ArtifactElement {
const sandbox = this.sandboxIframeRef.value;
const sandboxId = `artifact-${this.filename}`;
const downloadContent =
sandbox?.prepareHtmlDocument(sandboxId, this._content, this.runtimeProviders || [], true) || this._content;
sandbox?.prepareHtmlDocument(sandboxId, this._content, this.runtimeProviders || [], {
isHtmlArtifact: true,
isStandalone: true, // Skip runtime bridge and navigation interceptor for standalone downloads
}) || this._content;
return html`
<div class="flex items-center gap-2">