The bar, Shopify's way: three elements

# The bar, Shopify's super-compact way (docs/CONTRACT.md §15): exactly three elements, the view chip, the search
# box and the Display button (views="dropdown" promote=""); every setting lives in Display. Selecting rows lays the bulk
# band over the column headers (Shopify's "N selected"). Four of the toolbar-bar case's views over robotparts' 1,149
# actuators. Check it: node bin/data-ui.mjs check <this file>
data: ../robotparts-actuators/actuators.json
facets:
  - brand
  - form
  - drivetrain
  - buses
  - level
  - { property: peak_torque, as: range }
  - { property: mass, as: range }
  - { property: price, as: range }
  - { property: torque_density, as: has }
properties:
  model: { displayName: Model }
  brand: { displayName: Brand }
  form: { displayName: Form }
  drivetrain: { displayName: Drivetrain }
  peak_torque: { displayName: Peak torque }
  rated_torque: { displayName: Rated torque }
  max_speed: { displayName: Max speed }
  mass: { displayName: Mass }
  gear_ratio: { displayName: Ratio }
  voltage: { displayName: Voltage }
  od: { displayName: OD }
  length: { displayName: Length }
  buses: { displayName: Bus }
  torque_density: { displayName: Peak N·m/kg }
  price: { displayName: Price from }
  sellers: { displayName: Sellers }
  level: { displayName: Level }
views:
  - type: table
    name: Rows
    order: [model, brand, form, drivetrain, peak_torque, rated_torque, mass, price, buses]
    sort:
      - { property: peak_torque, direction: DESC }
  - type: cards
    name: Gallery
    order: [model, brand, peak_torque, mass, price]
    image: photo
    imageFit: contain
    imageAspectRatio: 0.8
    cardSize: 190
  - type: chart
    name: Torque vs mass
    chart:
      mark: point
      encoding:
        x: { field: mass, type: quantitative }
        y: { field: peak_torque, type: quantitative }
        color: { field: brand, type: nominal }
  - type: table
    name: By brand
    order: [model, form, peak_torque, rated_torque, max_speed, mass, gear_ratio, voltage, od, length, buses, price]
    groupBy: { property: brand, direction: ASC }
    sort:
      - { property: peak_torque, direction: DESC }
    summaries: { peak_torque: Max, mass: Min, price: Min }

// ../robotparts-actuators/actuators.json: 1,149 rows, 608 KB; the first 3
{
 "id": "actuators",
 "title": "Actuators",
 "titleProperty": "name",
 "linkProperty": "url",
 "source": "robotparts dist/site/v2/catalog.json, release 2026.10.25 (lane/tables @ ab5ba92); mass from each spec's own unit; photo: robotparts media/photos.jsonl, 150 of 1725 copied at 240 px",
 "properties": {
  "name": {
   "type": "text",
   "hidden": true
  },
  "model": {
   "type": "text",
   "width": 190
  },
  "brand": {
   "type": "text",
   "width": 120
  },
  "form": {
   "type": "text",
   "width": 140,
   "display": "badge"
  },
  "drivetrain": {
   "type": "text",
   "width": 104
  },
  "buses": {
   "type": "list",
   "width": 120
  },
  "level": {
   "type": "number",
   "width": 58
  },
  "url": {
   "type": "text",
   "hidden": true
  },
  "torque_density": {
   "type": "number",
   "unitText": "N·m/kg",
   "width": 130,
   "derived": "peak torque / mass, by robotparts"
  },
  "price": {
   "type": "number",
   "unitText": "USD",
   "decimals": 0,
   "width": 120
  },
  "sellers": {
   "type": "number",
   "width": 70
  },
  "peak_torque": {
   "type": "number",
   "unitText": "N·m",
   "width": 126
  },
  "rated_torque": {
   "type": "number",
   "unitText": "N·m",
   "width": 126
  },
  "max_speed": {
   "type": "number",
   "unitText": "rpm",
   "width": 126
  },
  "mass": {
   "type": "number",
   "unitText": "g",
   "width": 126
  },
  "gear_ratio": {
   "type": "number",
   "unitText": ":1",
   "width": 126
  },
  "voltage": {
   "type": "number",
   "unitText": "V",
   "width": 126
  },
  "od": {
   "type": "number",
   "unitText": "mm",
   "width": 126
  },
  "length": {
   "type": "number",
   "unitText": "mm",
   "width": 126
  },
  "photo": {
   "type": "text",
   "hidden": true,
   "display": "image",
   "note": "robotparts' primary photo, resized; only the parts this case copied have one"
  },
  "step_up": {
   "type": "text",
   "hidden": true,
   "derived": "the next photographed part of the same brand up in peak torque (build_examples.py)",
   "note": "an edge for the graph view: among the parts with a photo here, the brand's next one up in peak torque"
  }
 },
 "rows": [
  {
   "id": "aifitlab-8541438771336",
   "name": "Steadywin GIM4305-10",
   "brand": "Steadywin",
   "model": "GIM4305-10",
   "form": "integrated actuator",
   "drivetrain": "geared",
   "buses": [
    "can",
    "rs485"
   ],
   "level": 4,
   "url": "https://robotparts.dev/actuator/aifitlab-8541438771336/",
   "peak_torque": {
    "value": 3.82,
    "basis": "seller",
    "source": "aifitlab.com"
   },
   "rated_torque": 1.05,
   "max_speed": 402,
   "mass": {
    "value": 150,
    "basis": "seller",
    "source": "aifitlab.com"
   },
   "gear_ratio": 10,
   "voltage": 24,
   "od": 53,
   "length": 26,
   "torque_density": 25.467,
   "price": 70,
   "sellers": 1,
   "photo": "photos/aifitlab-8541438771336.webp",
   "step_up": "aifitlab-8542347853960"
  },
  {
   "id": "aifitlab-8542347853960",
   "name": "Steadywin GIM6010-8",
   "brand": "Steadywin",
   "model": "GIM6010-8",
   "form": "integrated actuator",
   "drivetrain": "geared",
   "buses": [
    "can",
    "rs485"
   ],
   "level": 1,
   "url": "https://robotparts.dev/actuator/aifitlab-8542347853960/",
   "peak_torque": {
    "value": 11,
    "basis": "seller",
    "source": "aifitlab.com"
   },
   "rated_torque": 5,
   "max_speed": 420,
   "mass": {
    "value": 388,
    "basis": "seller",
    "source": "aifitlab.com"
   },
   "gear_ratio": 8,
   "voltage": 24,
   "od": 80,
   "length": 40,
   "torque_density": 28.351,
   "price": 70,
   "sellers": 1,
   "photo": "photos/aifitlab-8542347853960.webp",
   "step_up": "aifitlab-8542620287112"
  },
  {
   "id": "aifitlab-8542620287112",
   "name": "Steadywin GIM8108-8",
   "brand": "Steadywin",
   "model": "GIM8108-8",
   "form": "integrated actuator",
   "drivetrain": "geared",
   "buses": [
    "can",
    "rs485"
   ],
   "level": 1,
   "url": "https://robotparts.dev/actuator/aifitlab-8542620287112/",
   "peak_torque": {
    "value": 22,
    "basis": "seller",
    "source": "aifitlab.com"
   },
   "rated_torque": 7.5,
   "max_speed": 320,
   "mass": {
    "value": 396,
    "basis": "seller",
    "source": "aifitlab.com"
   },
   "gear_ratio": 8,
   "voltage": 48,
   "od": 92,
   "length": 55,
   "torque_density": 55.556,
   "price": 85,
   "sellers": 1,
   "photo": "photos/aifitlab-8542620287112.webp",
   "step_up": null
  }
 ],
 "imageProperty": "photo"
}