What would this composition show?

Free; cached by composition content.

Per visible element (named by data-tc-anchor, data-wire-id, id, or tag.class plus its text): box on the composition canvas, fraction in frame, clipping by an overflow:hidden ancestor (and which), text overflow, glyph px when the frame is shown 360 px wide, contrast against the CSS paint underneath (null over an image), what covers it and which text it overlaps. Plus a sampled visibility timeline, fonts that failed to load, tc-wire conformance when a wire spec is present, and grouped one-line findings.

For a draft you hold: times are on its own clock.

curl -X POST "https://example.com/compositions/frame-report" \  -H "Content-Type: application/json" \  -d '{    "html": "string",    "times": [      0    ]  }'

{
  "data": {
    "property1": null,
    "property2": null
  }
}

{
  "error": {
    "type": "string",
    "code": "string",
    "message": "string"
  }
}

{
  "error": {
    "type": "string",
    "code": "string",
    "message": "string"
  }
}

{
  "error": {
    "type": "string",
    "code": "string",
    "message": "string"
  }
}

{
  "error": {
    "type": "string",
    "code": "string",
    "message": "string"
  }
}

{
  "error": {
    "type": "string",
    "code": "string",
    "message": "string"
  }
}