Function mouse

explainshell/web/static/js/d3.v3.js:7636–7639

()

      brushmove();
      d3_eventCancel();
      function mouse() {
        var touches = d3.event.changedTouches;
        return touches ? d3.touches(target, touches)[0] : d3.mouse(target);
      }
      function keydown() {
        if (d3.event.keyCode == 32) {
          if (!dragging) {