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How to activate smooth scrolling for href?

If you wish to scroll a user based on a click of a #hash tag, here is a snippet of code written in jQuery to help you do that. All you need to do is place it before </head> tag.

<script id="rendered-js">
// Select all links with hashes
$('a[href*="#"]')
// Remove links that don't actually link to anything
.not('[href="#"]').
not('[href="#0"]').
click(function (event) {
  // On-page links
  if (
  location.pathname.replace(/^\//, '') == this.pathname.replace(/^\//, '') &&

  location.hostname == this.hostname)
  {
    // Figure out element to scroll to
    var target = $(this.hash);
    target = target.length ? target : $('[name=' + this.hash.slice(1) + ']');
    // Does a scroll target exist?
    if (target.length) {
      // Only prevent default if animation is actually gonna happen
      event.preventDefault();
      $('html, body').animate({
        scrollTop: target.offset().top },
      1000, function () {
        // Callback after animation
        // Must change focus!
        var $target = $(target);
        $target.focus();
        if ($target.is(":focus")) {// Checking if the target was focused
          return false;
        } else {
          $target.attr('tabindex', '-1'); // Adding tabindex for elements not focusable
          $target.focus(); // Set focus again
        };
      });
    }
  }
});
      //# sourceURL=pen.js
    </script>

Here is the demo how it will function: