mdbootstrap4-pro/js/modules/src/smooth-scroll.js

MDBootstrap 4 PRO

// SMOOTH SCROLL
const SMOOTH_SCROLL_DURATION = 700

$('.smooth-scroll').on('click', 'a', function() {
  const elAttr = $(this).attr('href')
  if (typeof elAttr !== typeof undefined && elAttr.indexOf('#') == 0) {
    const offset = $(this).attr('data-offset') ? $(this).attr('data-offset') : 0
    const setHash = $(this).closest('ul').attr('data-allow-hashes')
    $('body,html').animate({
      scrollTop: $(elAttr).offset().top - offset
    }, SMOOTH_SCROLL_DURATION)
    if (typeof setHash !== typeof undefined && setHash !== false) {
      history.replaceState(null, null, elAttr)
    }

    return false
  }
})