CSS property behavior

Find it in the repository

Collector source

core/signals/css/property-behavior.ts

Export

measurementModule · Signal object

Field definitions

core/definitions/css/property-behavior.ts

Capture membership

Product capture · common/capture/product.ts

Page registration

app/signals/registry.ts

Field projection

core/results/measurement.ts

Execution contract

Signal

css.property-behavior

Collector

css.property-behavior

API / surface

core/signals/css/property-behavior.ts

Timeout

1000 ms

Companion signals

None

Fixture inputs

Inline owned corpora (listed below)

• core/fixtures/css/property-behavior-inputs.ts · sha256:cc9bbda252a6bbc1390651c4e4d3e7976614c2ca85b2234203e927c003156246

[
  {
    "key": "css.property-behavior.responses",
    "inputs": {
      "corner-smoothing": {
        "property": "-electron-corner-smoothing",
        "value": "37%",
        "reset": "all:initial;box-sizing:content-box;direction:ltr;writing-mode:horizontal-tb;font:16px/normal monospace;letter-spacing:normal;word-spacing:normal;text-transform:none;",
        "realm": "owned about:blank frame"
      },
      "finite-control": {
        "property": "width",
        "value": "37px",
        "reset": "all:initial;box-sizing:content-box;direction:ltr;writing-mode:horizontal-tb;font:16px/normal monospace;letter-spacing:normal;word-spacing:normal;text-transform:none;",
        "realm": "owned about:blank frame"
      },
      "invalid-control": {
        "property": "width",
        "value": "invalid-control",
        "reset": "all:initial;box-sizing:content-box;direction:ltr;writing-mode:horizontal-tb;font:16px/normal monospace;letter-spacing:normal;word-spacing:normal;text-transform:none;",
        "realm": "owned about:blank frame"
      }
    },
    "controls": {}
  }
]

One collector runs per invocation. Results and JSON select this signal’s fields; any companions execute in the same collector.

Generated source manifest lists runtime files, fixture URLs and content digests for this build. The Source tab provides a copyable console sample.

Run and edit locally

From the repository root, start the Astro app, then open /signals/css.property-behavior. Edit the collector source and reload the page to load its new build.

pnpm run dev:web

In a browser module served by this repository’s Vite graph:

import { createCollector } from "/core/collect"
import { measurementModule } from "/core/signals/css/property-behavior"

const signal = measurementModule
const collector = createCollector()
const suite = { signals: [signal] }
const result = await collector.collect(suite)

Reuse the collector owner for repeated calls so collection can enforce cleanup. This returns the collector’s raw result; app/signals/projection.ts selects the retained fields shown on this page.

rg -n 'measurementModule' core app tests
pnpm run check
pnpm run test tests/unit/app/focused-projection.test.ts