blockscout/apps/explorer_web/assets/js/pages/address.js

import $ from 'jquery'
import humps from 'humps'
import socket from '../socket'
import router from '../router'

function batch(func) {
  let timeout
  let batch = []
  return function(...args) {
    const context = this
    batch.push(args)
    let later = function() {
      timeout = null
      func.apply(context, [batch])
      batch = []
    }
    clearTimeout(timeout)
    timeout = setTimeout(later, 1000)
  }
}

router.when('/addresses/:addressHash').then(({ addressHash, blockNumber, filter }) => {
  const channel = socket.channel(`addresses:${addressHash}`, {})
  const $channelDisconnected = $('[data-selector="channel-disconnected-message"]')
  channel.join()
    .receive('ok', resp => { console.log('Joined successfully', `addresses:${addressHash}`, resp) })
    .receive('error', resp => { console.log('Unable to join', `addresses:${addressHash}`, resp) })
  channel.onError(() => {
    $channelDisconnected.show()
  })

  if (!blockNumber) {
    const $emptyTransactionsList = $('[data-selector="empty-transactions-list"]')
    if ($emptyTransactionsList.length) {
      channel.on('transaction', () => {
        window.location.reload()
      })
    }

    const $transactionsList = $('[data-selector="transactions-list"]')
    if ($transactionsList.length) {
      channel.on('transaction', batch((argsArray) => {
        if ($channelDisconnected.is(':visible')) {
          return
        }

        let msgs = humps.camelizeKeys(argsArray).map(args=>args[0])

        if (filter === 'to') {
          msgs = msgs.filter(({toAddressHash})=>toAddressHash===addressHash)
        }
        if (filter === 'from') {
          msgs = msgs.filter(({fromAddressHash})=>fromAddressHash===addressHash)
        }

        const transactionsHtml = msgs.map(({transactionHtml})=>transactionHtml).join('')
        $transactionsList.prepend(transactionsHtml)
      }))
    }
  }
})