currency-formatter.html

<script>
  var Webflow = Webflow || [];

  // DOMready has fired - may now use jQuery and Webflow api
  Webflow.push(function () {
    // We create an instance of a number formatter to format our currency
    // We've used 'pt-BR' as our instance locale. Here's a exhaustive list of existing
    // locales: http://download1.parallels.com/SiteBuilder/Windows/docs/3.2/en_US/sitebulder-3.2-win-sdk-localization-pack-creation-guide/30801.htm
    //
    // Also, if you want more fine grained control over your formatter, just check out MDN docs here: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/NumberFormat
    const currencyFormatter = Intl.NumberFormat('pt-BR', {
      style : 'currency',
      currency: 'BRL',
      minimumFractionDigits: 0,
      maximumFractionDigits: 2
    })

    // We iterate through all of our currency elements and update them with our format
    // It's important that their contents must be composed of numbers only, otherwise this script will throw an error
    function updateCurrencies() {
    // Here you should change ".currency" class with yours
      const currencyElements = document.querySelectorAll(".currency")

      currencyElements.forEach(element => {
        const currencyNumber = Number(element.innerHTML)
        element.innerHTML = currencyFormatter.format(currencyNumber)
      })
    }
    
    updateCurrencies()
  })
</script>