我已经在线检查了不同的示例，但仍然没有运气。我目前有一个弹出菜单，可以将鼠标悬停在子菜单上，显示主菜单。我下面有html，css和我要使用的jquery库的示例。该库称为“菜单目标”，其焦点是在显示其子菜单列表时保持父子菜单的悬停状态，并且仅在单击时释放该状态。有没有更简单的方法可以用jquery做到这一点？
一段HTML 购物 苹果商店
CSS
/**
* menu-aim is a jQuery plugin for dropdown menus that can differentiate
* between a user trying hover over a dropdown item vs trying to navigate into
* a submenu's contents.
*
* menu-aim assumes that you have are using a menu with submenus that expand
* to the menu's right. It will fire events when the user's mouse enters a new
* dropdown item *and* when that item is being intentionally hovered over.
*
* __________________________
* | Monkeys >| Gorilla |
* | Gorillas >| Content |
* | Chimps >| Here |
* |___________|____________|
*
* In the above example, "Gorillas" is selected and its submenu content is
* being shown on the right. Imagine that the user's cursor is hovering over
* "Gorillas." When they move their mouse into the "Gorilla Content" area, they
* may briefly hover over "Chimps." This shouldn't close the "Gorilla Content"
* area.
*
* This problem is normally solved using timeouts and delays. menu-aim tries to
* solve this by detecting the direction of the user's mouse movement. This can
* make for quicker transitions when navigating up and down the menu. The
* experience is hopefully similar to amazon.com/'s "Shop by Department"
* dropdown.
*
* Use like so:
*
* $("#menu").menuAim({
* activate: $.noop, // fired on row activation
* deactivate: $.noop // fired on row deactivation
* });
*
* ...to receive events when a menu's row has been purposefully (de)activated.
*
* The following options can be passed to menuAim. All functions execute with
* the relevant row's HTML element as the execution context ('this'):
*
* .menuAim({
* // Function to call when a row is purposefully activated. Use this
* // to show a submenu's content for the activated row.
* activate: function() {},
*
* // Function to call when a row is deactivated.
* deactivate: function() {},
*
* // Function to call when mouse enters a menu row. Entering a row
* // does not mean the row has been activated, as the user may be
* // mousing over to a submenu.
* enter: function() {},
*
* // Function to call when mouse exits a menu row.
* exit: function() {},
*
* // Selector for identifying which elements in the menu are rows
* // that can trigger the above events. Defaults to "> li".
* rowSelector: "> li",
*
* // You may have some menu rows that aren't submenus and therefore
* // shouldn't ever need to "activate." If so, filter submenu rows w/
* // this selector. Defaults to "*" (all elements).
* submenuSelector: "*",
*
* // Direction the submenu opens relative to the main menu. Can be
* // left, right, above, or below. Defaults to "right".
* submenuDirection: "right"
* });
*
* https://github.com/kamens/jQuery-menu-aim
*/
(function($) {
$.fn.menuAim = function(opts) {
// Initialize menu-aim for all elements in jQuery collection
this.each(function() {
init.call(this, opts);
});
return this;
};
function init(opts) {
var $menu = $(this),
activeRow = null,
mouseLocs = [],
lastDelayLoc = null,
timeoutId = null,
options = $.extend(
{
rowSelector: "> li",
submenuSelector: "*",
submenuDirection: "right",
tolerance: 75, // bigger = more forgivey when entering submenu
enter: $.noop,
exit: $.noop,
activate: $.noop,
deactivate: $.noop,
exitMenu: $.noop
},
opts
);
var MOUSE_LOCS_TRACKED = 3, // number of past mouse locations to track
DELAY = 300; // ms delay when user appears to be entering submenu
/**
* Keep track of the last few locations of the mouse.
*/
var mousemoveDocument = function(e) {
mouseLocs.push({
x: e.pageX,
y: e.pageY
});
if (mouseLocs.length > MOUSE_LOCS_TRACKED) {
mouseLocs.shift();
}
};
/**
* Cancel possible row activations when leaving the menu entirely
*/
var mouseleaveMenu = function() {
if (timeoutId) {
clearTimeout(timeoutId);
}
// If exitMenu is supplied and returns true, deactivate the
// currently active row on menu exit.
if (options.exitMenu(this)) {
if (activeRow) {
options.deactivate(activeRow);
}
activeRow = null;
}
};
/**
* Trigger a possible row activation whenever entering a new row.
*/
var mouseenterRow = function() {
if (timeoutId) {
// Cancel any previous activation delays
clearTimeout(timeoutId);
}
options.enter(this);
possiblyActivate(this);
},
mouseleaveRow = function() {
options.exit(this);
};
/*
* Immediately activate a row if the user clicks on it.
*/
var hoverRow = function() {
activate(this);
};
/**
* Activate a menu row.
*/
var activate = function(row) {
if (row == activeRow) {
return;
}
if (activeRow) {
options.deactivate(activeRow);
}
options.activate(row);
activeRow = row;
};
/**
* Possibly activate a menu row. If mouse movement indicates that we
* shouldn't activate yet because user may be trying to enter
* a submenu's content, then delay and check again later.
*/
var possiblyActivate = function(row) {
var delay = activationDelay();
if (delay) {
timeoutId = setTimeout(function() {
possiblyActivate(row);
}, delay);
} else {
activate(row);
}
};
/**
* Return the amount of time that should be used as a delay before the
* currently hovered row is activated.
*
* Returns 0 if the activation should happen immediately. Otherwise,
* returns the number of milliseconds that should be delayed before
* checking again to see if the row should be activated.
*/
var activationDelay = function() {
if (!activeRow || !$(activeRow).is(options.submenuSelector)) {
// If there is no other submenu row already active, then
// go ahead and activate immediately.
return 0;
}
var offset = $menu.offset(),
upperLeft = {
x: offset.left,
y: offset.top - options.tolerance
},
upperRight = {
x: offset.left + $menu.outerWidth(),
y: upperLeft.y
},
lowerLeft = {
x: offset.left,
y: offset.top + $menu.outerHeight() + options.tolerance
},
lowerRight = {
x: offset.left + $menu.outerWidth(),
y: lowerLeft.y
},
loc = mouseLocs[mouseLocs.length - 1],
prevLoc = mouseLocs[0];
if (!loc) {
return 0;
}
if (!prevLoc) {
prevLoc = loc;
}
if (
prevLoc.x < offset.left ||
prevLoc.x > lowerRight.x ||
prevLoc.y < offset.top ||
prevLoc.y > lowerRight.y
) {
// If the previous mouse location was outside of the entire
// menu's bounds, immediately activate.
return 0;
}
if (lastDelayLoc && loc.x == lastDelayLoc.x && loc.y == lastDelayLoc.y) {
// If the mouse hasn't moved since the last time we checked
// for activation status, immediately activate.
return 0;
}
// Detect if the user is moving towards the currently activated
// submenu.
//
// If the mouse is heading relatively clearly towards
// the submenu's content, we should wait and give the user more
// time before activating a new row. If the mouse is heading
// elsewhere, we can immediately activate a new row.
//
// We detect this by calculating the slope formed between the
// current mouse location and the upper/lower right points of
// the menu. We do the same for the previous mouse location.
// If the current mouse location's slopes are
// increasing/decreasing appropriately compared to the
// previous's, we know the user is moving toward the submenu.
//
// Note that since the y-axis increases as the cursor moves
// down the screen, we are looking for the slope between the
// cursor and the upper right corner to decrease over time, not
// increase (somewhat counterintuitively).
function slope(a, b) {
return (b.y - a.y) / (b.x - a.x);
}
var decreasingCorner = upperRight,
increasingCorner = lowerRight;
// Our expectations for decreasing or increasing slope values
// depends on which direction the submenu opens relative to the
// main menu. By default, if the menu opens on the right, we
// expect the slope between the cursor and the upper right
// corner to decrease over time, as explained above. If the
// submenu opens in a different direction, we change our slope
// expectations.
if (options.submenuDirection == "left") {
decreasingCorner = lowerLeft;
increasingCorner = upperLeft;
} else if (options.submenuDirection == "below") {
decreasingCorner = lowerRight;
increasingCorner = lowerLeft;
} else if (options.submenuDirection == "above") {
decreasingCorner = upperLeft;
increasingCorner = upperRight;
}
var decreasingSlope = slope(loc, decreasingCorner),
increasingSlope = slope(loc, increasingCorner),
prevDecreasingSlope = slope(prevLoc, decreasingCorner),
prevIncreasingSlope = slope(prevLoc, increasingCorner);
if (
decreasingSlope < prevDecreasingSlope &&
increasingSlope > prevIncreasingSlope
) {
// Mouse is moving from previous location towards the
// currently activated submenu. Delay before activating a
// new menu row, because user may be moving into submenu.
lastDelayLoc = loc;
return DELAY;
}
lastDelayLoc = null;
return 0;
};
/**
* Hook up initial menu events
*/
$menu
.mouseleave(mouseleaveMenu)
.find(options.rowSelector)
.mouseenter(mouseenterRow)
.mouseleave(mouseleaveRow)
.hover(hoverRow);
$(document).mousemove(mousemoveDocument);
}
})(jQuery);
jQuery插件菜单目标
<table class="table table-striped table-bordered <?php echo !empty($rows) ? 'data-table-display-class' : ''; ?>">