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Styling Items by Type

Timeline

Define reusable styles in types for consistent theming.

Styling Items by Type
View live example →

Styles can be inherited from a type.

Define the type that an item inherits from in the type property.

See also:

import { createTimeline } from "kronograph";
import data from "./data";

const timeline = createTimeline("my-timeline");

timeline.set(data);
timeline.fit();
export default {
  entityTypes: {
    person: {
      color: "#0286F2",
      labelColor: "#EEEEEE",
      lineWidth: 12,
      typeLabel: "People",
    },
    company: {
      color: "#E9B628",
      labelColor: "#FDCA40",
      lineWidth: 2,
      typeLabel: "Companies",
    },
  },
  eventTypes: {
    email: {
      lineWidth: 2,
    },
    phoneCall: {
      lineWidth: 6,
      showArrows: false,
    },
  },
  entities: {
    "smith-johnathan-151": {
      label: "John Smith",
      type: "person",
    },
    "west-josephine-126": {
      label: "Josephine West",
      type: "person",
    },
    "roberts-nathaniel-023": {
      label: "Nathan Roberts",
      type: "person",
    },
    company0375: {
      label: "Leffler Inc.",
      type: "company",
    },
    company1846: {
      label: "EDI Group",
      type: "company",
    },
  },
  events: {
    "email 1": {
      entityIds: ["smith-johnathan-151", "company0375"],
      type: "email",
      time: new Date(2026, 9, 14),
    },
    "email 2": {
      entityIds: ["west-josephine-126", "company0375"],
      type: "email",
      time: new Date(2026, 3, 15),
    },
    "email 3": {
      entityIds: ["roberts-nathaniel-023", "company0375"],
      type: "email",
      time: new Date(2027, 7, 16),
    },
    "call 1": {
      entityIds: ["west-josephine-126", "company0375"],
      type: "phoneCall",
      time: new Date(2027, 10, 14),
    },
    "email 4": {
      entityIds: ["roberts-nathaniel-023", "company0375"],
      type: "email",
      time: new Date(2026, 12, 12),
    },
    "email 5": {
      entityIds: ["smith-johnathan-151", "company0375"],
      type: "email",
      time: new Date(2028, 3, 15),
    },
    "email 6": {
      entityIds: ["smith-johnathan-151", "company1846"],
      type: "email",
      time: new Date(2025, 9, 14),
    },
    "call 2": {
      entityIds: ["west-josephine-126", "company1846"],
      type: "phoneCall",
      time: new Date(2025, 12, 15),
    },
    "email 7": {
      entityIds: ["roberts-nathaniel-023", "company1846"],
      type: "email",
      time: new Date(2028, 2, 16),
    },
    "email 8": {
      entityIds: ["west-josephine-126", "company1846"],
      type: "email",
      time: new Date(2026, 2, 24),
    },
    "email 9": {
      entityIds: ["roberts-nathaniel-023", "company1846"],
      type: "email",
      time: new Date(2028, 6, 16),
    },
    "email 10": {
      entityIds: ["smith-johnathan-151", "company1846"],
      type: "email",
      time: new Date(2028, 7, 12),
    },
  },
};
<!doctype html>
<html>
  <head>
    <link rel="stylesheet" href="@ci/theme/kg/css/examples.css" />
  </head>
  <body>
    <div id="my-timeline" style="height: 100vh"></div>
    <script type="module" src="./code.js"></script>
  </body>
</html>
import React from "react";
import { createRoot } from "react-dom/client";
import Timeline from "kronograph/react/Timeline";
import data from "./data";

export const Demo = () => (
  <Timeline
    entityTypes={data.entityTypes}
    eventTypes={data.eventTypes}
    entities={data.entities}
    events={data.events}
  />
);

const root = createRoot(document.getElementById("my-timeline"));
root.render(<Demo />);
export default {
  entityTypes: {
    person: {
      color: "#0286F2",
      labelColor: "#EEEEEE",
      lineWidth: 12,
      typeLabel: "People",
    },
    company: {
      color: "#E9B628",
      labelColor: "#FDCA40",
      lineWidth: 2,
      typeLabel: "Companies",
    },
  },
  eventTypes: {
    email: {
      lineWidth: 2,
    },
    phoneCall: {
      lineWidth: 6,
      showArrows: false,
    },
  },
  entities: {
    "smith-johnathan-151": {
      label: "John Smith",
      type: "person",
    },
    "west-josephine-126": {
      label: "Josephine West",
      type: "person",
    },
    "roberts-nathaniel-023": {
      label: "Nathan Roberts",
      type: "person",
    },
    company0375: {
      label: "Leffler Inc.",
      type: "company",
    },
    company1846: {
      label: "EDI Group",
      type: "company",
    },
  },
  events: {
    "email 1": {
      entityIds: ["smith-johnathan-151", "company0375"],
      type: "email",
      time: new Date(2026, 9, 14),
    },
    "email 2": {
      entityIds: ["west-josephine-126", "company0375"],
      type: "email",
      time: new Date(2026, 3, 15),
    },
    "email 3": {
      entityIds: ["roberts-nathaniel-023", "company0375"],
      type: "email",
      time: new Date(2027, 7, 16),
    },
    "call 1": {
      entityIds: ["west-josephine-126", "company0375"],
      type: "phoneCall",
      time: new Date(2027, 10, 14),
    },
    "email 4": {
      entityIds: ["roberts-nathaniel-023", "company0375"],
      type: "email",
      time: new Date(2026, 12, 12),
    },
    "email 5": {
      entityIds: ["smith-johnathan-151", "company0375"],
      type: "email",
      time: new Date(2028, 3, 15),
    },
    "email 6": {
      entityIds: ["smith-johnathan-151", "company1846"],
      type: "email",
      time: new Date(2025, 9, 14),
    },
    "call 2": {
      entityIds: ["west-josephine-126", "company1846"],
      type: "phoneCall",
      time: new Date(2025, 12, 15),
    },
    "email 7": {
      entityIds: ["roberts-nathaniel-023", "company1846"],
      type: "email",
      time: new Date(2028, 2, 16),
    },
    "email 8": {
      entityIds: ["west-josephine-126", "company1846"],
      type: "email",
      time: new Date(2026, 2, 24),
    },
    "email 9": {
      entityIds: ["roberts-nathaniel-023", "company1846"],
      type: "email",
      time: new Date(2028, 6, 16),
    },
    "email 10": {
      entityIds: ["smith-johnathan-151", "company1846"],
      type: "email",
      time: new Date(2028, 7, 12),
    },
  },
};
<!doctype html>
<html>
  <head>
    <link rel="stylesheet" href="@ci/theme/kg/css/examples.css" />
  </head>
  <body>
    <div id="my-timeline" style="height: 100vh"></div>
    <script type="module" src="./code.jsx"></script>
  </body>
</html>

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