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# perfect-debounce

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[![npm downloads][npm-downloads-src]][npm-downloads-href]
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> An improved debounce function with Promise support.

- Well tested debounce implementation
- Native Promise support
- Avoid duplicate calls while promise is being resolved
- Configurable `trailing` and `leading` behavior

## Usage

Install package:

```sh
# npm
npm install perfect-debounce

# yarn
yarn add perfect-debounce

# pnpm
pnpm add perfect-debounce
```

Import:

```js
// ESM
import { debounce } from 'perfect-debounce'

// CommonJS
const { debounce } = require('perfect-debounce')
```

Debounce function:

```js
const debounced = debounce(async () => {
  // Some heavy stuff
}, 25)
```

When calling `debounced`, it will wait at least for `25ms` as configured before actually calling our function. This helps to avoid multiple calls.

To avoid initial wait, we can set `leading: true` option. It will cause function to be immediately called if there is no other call:

```js
const debounced = debounce(async () => {
  // Some heavy stuff
}, 25, { leading: true })
```

If executing async function takes longer than debounce value, duplicate calls will be still prevented a last call will happen. To disable this behavior, we can set `trailing: false` option:

```js
const debounced = debounce(async () => {
  // Some heavy stuff
}, 25, { trailing: false })
```

## 💻 Development

- Clone this repository
- Enable [Corepack](https://github.com/nodejs/corepack) using `corepack enable` (use `npm i -g corepack` for Node.js < 16.10)
- Install dependencies using `pnpm install`
- Run interactive tests using `pnpm dev`

## License

Made with 💛

Based on [sindresorhus/p-debounce](https://github.com/sindresorhus/p-debounce).

Published under [MIT License](./LICENSE).

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