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

<!--
    Licensed to the Apache Software Foundation (ASF) under one
    or more contributor license agreements.  See the NOTICE file
    distributed with this work for additional information
    regarding copyright ownership.  The ASF licenses this file
    to you under the Apache License, Version 2.0 (the
    "License"); you may not use this file except in compliance
    with the License.  You may obtain a copy of the License at

      http://www.apache.org/licenses/LICENSE-2.0

    Unless required by applicable law or agreed to in writing,
    software distributed under the License is distributed on an
    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
    KIND, either express or implied.  See the License for the
    specific language governing permissions and limitations
    under the License.
-->

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-ui/core/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).
:::