docs/developer_docs/components/ui/timer.mdx

---
title: Timer
sidebar_label: Timer
---

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import { StoryWithControls } from '../../../src/components/StorybookWrapper';

# Timer

A live elapsed-time display that counts up from a given start time. Used to show query and dashboard load durations. Requires a startTime timestamp to function.

## Live Example

<StoryWithControls
  component="Timer"
  props={{
  isRunning: true,
  status: "success",
  startTime: 1737936000000
}}
  controls={[
  {
    name: "isRunning",
    label: "Is Running",
    type: "boolean",
    description: "Whether the timer is actively counting. Toggle to start/stop."
  },
  {
    name: "status",
    label: "Status",
    type: "select",
    options: [
      "success",
      "warning",
      "danger",
      "info",
      "default",
      "primary",
      "secondary"
    ],
    description: "Visual status of the timer badge."
  }
]}
/>

## Try It

Edit the code below to experiment with the component:

```tsx live
function Demo() {
  const [isRunning, setIsRunning] = React.useState(true);
  const [startTime] = React.useState(Date.now());
  return (
    <div style={{ display: 'flex', alignItems: 'center', gap: 16 }}>
      <Timer
        startTime={startTime}
        isRunning={isRunning}
        status="success"
      />
      <Button onClick={() => setIsRunning(r => !r)}>
        {isRunning ? 'Stop' : 'Start'}
      </Button>
    </div>
  );
}
```

## Status Variants

```tsx live
function StatusVariants() {
  const [startTime] = React.useState(Date.now());
  return (
    <div style={{ display: 'flex', flexDirection: 'column', gap: 12 }}>
      {['success', 'warning', 'danger', 'info', 'default', 'primary', 'secondary'].map(status => (
        <div key={status} style={{ display: 'flex', alignItems: 'center', gap: 12 }}>
          <span style={{ width: 80 }}>{status}</span>
          <Timer startTime={startTime} isRunning status={status} />
        </div>
      ))}
    </div>
  );
}
```

## Completed Timer

```tsx live
function CompletedTimer() {
  const start = Date.now() - 5230;
  const end = Date.now();
  return (
    <div style={{ display: 'flex', alignItems: 'center', gap: 12 }}>
      <Timer
        startTime={start}
        endTime={end}
        isRunning={false}
        status="success"
      />
      <span style={{ color: '#999' }}>Query completed in ~5.2 seconds</span>
    </div>
  );
}
```

## Start and Stop

```tsx live
function StartStop() {
  const [isRunning, setIsRunning] = React.useState(false);
  const [startTime, setStartTime] = React.useState(null);
  const handleToggle = () => {
    if (!isRunning && !startTime) {
      setStartTime(Date.now());
    }
    setIsRunning(r => !r);
  };
  return (
    <div style={{ display: 'flex', alignItems: 'center', gap: 16 }}>
      <Timer
        startTime={startTime}
        isRunning={isRunning}
        status={isRunning ? 'warning' : 'success'}
      />
      <Button onClick={handleToggle}>
        {isRunning ? 'Pause' : startTime ? 'Resume' : 'Start'}
      </Button>
    </div>
  );
}
```

## Props

| Prop | Type | Default | Description |
|------|------|---------|-------------|
| `isRunning` | `boolean` | `true` | Whether the timer is actively counting. Toggle to start/stop. |
| `status` | `string` | `"success"` | Visual status of the timer badge. |
| `startTime` | `number` | `1737936000000` | - |

## Import

```tsx
import { Timer } from '@superset/components';
```

---

:::tip[Improve this page]
This documentation is auto-generated from the component's Storybook story.
Help improve it by [editing the story file](https://github.com/apache/superset/edit/master/superset-frontend/packages/superset-ui-core/src/components/Timer/Timer.stories.tsx).
:::