Question

我的以下工作示例显示了一个基本的菜单/导航系统，它在悬停事件中使用大于480px的屏幕宽度，并且单击/展开事件的宽度小于480px：

如果您将屏幕尺寸从大于480px缩小，您将看到我没有获得所需的效果，因此触发了悬停和点击事件。

我是jQuery的新手，所以任何有关如何防止这种情况的帮助都会很棒!!!!

我的代码到目前为止：

var next_move = "show";

$(document).ready(function () {

    $("#show-investment-type-nav").click(function() {

        if (Modernizr.mq('screen and (max-width: 480px)')) {
            $('#sub-menu').slideToggle(100);
            if (next_move === "show") {
                $("body").addClass("nav-active");
                $("#site-nav #icon").empty().html("&#59236;");
                $("#site-nav #nav-margin-down").animate({"margin-top": "163"}, 100);
                next_move = "hide";
            } else {
                $("body").removeClass("nav-active");
                $("#site-nav #icon").empty().html("&#59238;");
                $("#site-nav #nav-margin-down").animate({"margin-top": "0"}, 100);
                next_move = "show";
            }
        }
    });

    function doneResizing() {
        if (Modernizr.mq('screen and (min-width: 481px)')) {

            // Hide submenu
            $("#sub-menu").hide();

             // Reset margin for li tags if screen expanded whilst nav open
            $("#site-nav #nav-margin-down").css("margin-top","0");

            $("#show-investment-type-nav").hover(function() {
                $(this).find("#sub-menu").stop(true, true).slideDown("fast");
            }, function () {
                $(this).find("#sub-menu").stop(true, true).fadeOut("fast");
            });
        } else if (Modernizr.mq('screen and (max-width: 480px)')) {
            $("#sub-menu").hide();  
            next_move = "show";
        }
    }

    var id;
    $(window).resize(function () {
        clearTimeout(id);
        id = setTimeout(doneResizing, 0);
    });

    doneResizing();
});

Answer 1

这似乎解决了这个问题，但无疑更像是一个黑客攻击：

var next_move = "show";

$(document).ready(function () {

  // Touch device fix to prevent submenu being shown during initial load
  $('#sub-menu').css("display","block");

    $("#show-investment-type-nav").click(function() {

      if (Modernizr.mq('screen and (max-width: 480px)')) {
        $('#sub-menu').slideToggle(100);
        if (next_move === "show") {
          $("body").addClass("nav-active");
          $("#site-nav #icon").empty().html("&#59236;");
          $("#site-nav #nav-margin-down").animate({"margin-top": "163"}, 100);
          next_move = "hide";
        } else {
          $("body").removeClass("nav-active");
          $("#site-nav #icon").empty().html("&#59238;");
          $("#site-nav #nav-margin-down").animate({"margin-top": "0"}, 100);
          next_move = "show";
        }
      }
    });

  function doneResizing() {
    if (Modernizr.mq('screen and (min-width: 481px)')) {

      // Hide submenu
      $("#sub-menu").hide();

      // Reset margin for li tags if screen expanded whilst nav open
      $("#site-nav #nav-margin-down").css("margin-top","0");

      $("#show-investment-type-nav").hover(function() {
          $(this).find("#sub-menu").stop(true, true).slideDown("fast");
      }, function () {
          $(this).find("#sub-menu").stop(true, true).fadeOut("fast");
      });
    } else if (Modernizr.mq('screen and (max-width: 480px)')) {

      // Fixes issue on touch device when you touch away from expanded submenu...this took forever!!!
      $('#sub-menu').slideUp(100);
      $("#site-nav #nav-margin-down").animate({"margin-top": "0"}, 100);

      // To make sure if nav expanded, so next_move ="hide", hover event doesn't hide() submenu
      if (!Modernizr.touch) {
        $("#show-investment-type-nav").hover(function() {
          $("#sub-menu").hide();
          if (next_move === "hide") {
            $("#sub-menu").show();
          }
        });
      }

      next_move = "show";
    }
  }

  var id;
  $(window).resize(function () {
    clearTimeout(id);
    id = setTimeout(doneResizing, 0);
  });

  doneResizing();
});

在特定媒体查询时阻止jQuery悬停事件

1 个答案: