use-debounced-value

Debounce value changes

Import

Source

View source code

Docs

Edit this page

Package

@mantine/hooks

Usage

Use hook to debounce value change. This can be useful in case you want to perform a heavy operation based on react state, for example, send search request.

Enter value to see debounce effect

Value: [empty string]

Debounced value: [empty string]

import { useState } from 'react';
import { useDebouncedValue } from '@mantine/hooks';
import { TextInput, Text } from '@mantine/core';

export function Demo() {
  const [value, setValue] = useState('');
  const [debounced] = useDebouncedValue(value, 200);

  return (
    <>
      <TextInput
        label="Enter value to see debounce"
        value={value}
        style={{ flex: 1 }}
        onChange={(event) => setValue(event.currentTarget.value)}
      />

      <Text>Value: {value}</Text>
      <Text>Debounced value: {debounced}</Text>
    </>
  );
}

Leading update

You can remove immediately update value with first call with { leading: true } options:

Enter value to see debounce effect

Value: [empty string]

Debounced value: [empty string]

import { useState } from 'react';
import { useDebouncedValue } from '@mantine/hooks';
import { TextInput, Text } from '@mantine/core';

export function Demo() {
  const [value, setValue] = useState('');
  const [debounced] = useDebouncedValue(value, 200, { leading: true });

  return (
    <>
      <TextInput
        label="Enter value to see debounce"
        value={value}
        style={{ flex: 1 }}
        onChange={(event) => setValue(event.currentTarget.value)}
      />

      <Text>Value: {value}</Text>
      <Text>Debounced value: {debounced}</Text>
    </>
  );
}

Cancel update

Hook provides cancel callback, you can use it to cancel update. Update cancels automatically on component unmount.

In this example, type in some text and click cancel button within a minute to cancel debounced value change:

Enter value to see debounce effect

Value: [empty string]

Debounced value: [empty string]

import { useState } from 'react';
import { useDebouncedValue } from '@mantine/hooks';
import { TextInput, Text, Button } from '@mantine/core';

export function Demo() {
  const [value, setValue] = useState('');
  const [debounced, cancel] = useDebouncedValue(value, 1000);

  return (
    <>
      <TextInput
        label="Enter value to see debounce"
        value={value}
        style={{ flex: 1 }}
        onChange={(event) => setValue(event.currentTarget.value)}
      />
      <Button onClick={cancel} size="lg" style={{ marginLeft: 15 }}>
        Cancel
      </Button>

      <Text>Value: {value}</Text>
      <Text>Debounced value: {debounced}</Text>
    </>
  );
}

Definition

function useDebouncedValue<T = any>(
  value: T,
  wait: number,
  options?: {
    leading: boolean;
  }
): readonly [T, () => void];

Build fully functional accessible web applications with ease

Project

Contribute to Mantine Changelog Releases

Community

Join Discord community Follow on Twitter Email newsletter Github discussions

Feedback

Your feedback is most valuable contribution to the project, please share how you use Mantine, what features are missing and what is done good

Leave feedback

Built by Vitaly Rtishchev and these awesome people

Join Discord community

Follow Mantine on Twitter