How would I prevent redirecting of a href during touchmove and mousemove?

i think i figured out little solution for you. enable the preventDefault and afterwards enable the draggable for the a tag. Let me know if this works for you.

 start(e) {
  e.preventDefault();
  ...//rest of the code
 apply() {
  $el.draggable("enable");
  ...//rest of the code

I think I found the solution about this. I add this code for some people in the future who are trying hard to search the same problem such as me.

    function start(event, etype, condition) {
      console.log(etype); // track the type of event
      if (!condition) event.preventDefault(); // compare etype(eventType). Set preventDefault if condition is falsy.
      items.off('click');
      items.on({
        ['touchmove mousemove']: (event) => move(event, etype, condition),
        ['touchend mouseup']: end
      });
    }

    function move(event, etype, cnd) {
      if (cnd) event.preventDefault();
      console.log(cnd); // track the type of event from the condition
      items.on('click', function(event) {event.preventDefault();});
    }

    function end(event) {
      items.off('touchmove mousemove touchend mouseup');
    }
    var items = $('.item a');
    items.on('touchstart mousedown', function() {
      var eventType = event.type;
      var condition = (eventType === 'touchstart' || eventType === 'mousedown');
      start(event, eventType, condition);
    });
    #anchor {
      display: block;
      width: 100px;
      height: 100px;
      background-color: orange;
    }
    .item {
    background-color: gray;
    }

    .item + .item {
        margin-top: 10px;
    }

    .item a {
        cursor: pointer;
        display: inline-block;
        background-color: blue;
        color: white;
        padding: 9px;
        width: 100%;
        height: 100%;
    }
    <div id="items" class="items">
      <div class="item">
          <a target="_blank" href="https://google.com">Anchor</a>
      </div>
      <div class="item">
          <a target="_blank" href="https://google.com">Anchor</a>
      </div>
    </div>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>