puppeteer-autoscroll-down

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puppeteer-autoscroll-down

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Handle infinite scroll on websites by puppeteer

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# Handle infinite scroll on websites with puppeteer

Small puppeteer tool which makes your parsing experience a little bit better

## Usage

**`size` - Number of pixels to scroll on each step** `[default: 250]`

**`delay` - Delay in ms after each completed scroll step** `[default: 100]`

**`stepsLimit` - Max number of steps to scroll** `[default: null]`

```js
const puppeteer = require('puppeteer')
const { scrollPageToBottom } = require('puppeteer-autoscroll-down')

const browser = await puppeteer.launch()
const page = await browser.newPage()
await page.goto('http://example.com')

const lastPosition = await scrollPageToBottom(page, {
  size: 500,
  delay: 250
})

await browser.close()
```

### Async content loading

**You can use returned value with request/response hooks to handle async content loading**

```js
const puppeteer = require('puppeteer')
const { scrollPageToBottom } = require('puppeteer-autoscroll-down')

const browser = await puppeteer.launch()
const page = await browser.newPage()
await page.goto('http://example.com')

let isLoadingAvailable = true // Your condition-to-stop

while (isLoadingAvailable) {
  await scrollPageToBottom(page, { size: 500 })
  await page.waitForResponse(
    response => response.url() === 'http://example.com' && response.status() === 200
  )
  isLoadingAvailable = false // Update your condition-to-stop value
}

await browser.close()
```

### Not only scroll to the bottom, but there is also function for scroll to the top

**`scrollPageToTop` supports same API as `scrollPageToBottom`**

```js
const puppeteer = require('puppeteer')
const { scrollPageToTop } = require('puppeteer-autoscroll-down')

const browser = await puppeteer.launch()
const page = await browser.newPage()
await page.goto('http://example.com')

const lastPosition = await scrollPageToTop(page, {
  size: 500,
  delay: 250
})

await browser.close()
```

## Install

```sh
npm i puppeteer-autoscroll-down
```

```sh
yarn add puppeteer-autoscroll-down
```

## License

MIT

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