Test2

test2.js

;(function companyNameFromEmail(emailElement, companyElement, $) {
  const DEBOUNCE_TIME = 250
  const COMPANY_REGEX = /(?<=@).+(?=\.)/

  const $companyField = $(companyElement)
  const $companyParagraph = $companyField.closest('p')

  $companyParagraph.hide()

  const toTitleCase = (string) => (
    string.replace(/\w\S*/g, (word) => (
      word.charAt(0).toUpperCase() + word.substr(1).toLowerCase()
    ))
  )

  const companyInput = () => {
    const email = $(emailElement).val()
    const companyMatch = email.match(COMPANY_REGEX)
    
    if(companyMatch) {
      const rawCompanyName = companyMatch[0].replace(/\./g,' ')
      const companyName = toTitleCase(rawCompanyName)
      $companyField.val(companyName)
      $companyParagraph.show('slow')
    }
  }

  const debounce = (func, wait, immediate) => {
    let timeout

    return function() {
      const context = this
      const args = arguments

      const later = () => {
        timeout = null
        if(!immediate) func.apply(context, args)
      }

      const callNow = immediate && !timeout
      clearTimeout(timeout)
      timeout = setTimeout(later, wait)
      if(callNow) func.apply(context, args)
    }
  }

  $(emailElement).keyup( 
    debounce(companyInput, DEBOUNCE_TIME)
  )

})('[name=your-work-email]', '[name=your-company]', jQuery);