I looked at some similar posts, but haven't found the solution I'm looking for. I am attempting to append div#dropdownmenu
only once. However, it continues to occur as I hover over the div. Any help would be greatly appreciated.
$(function () {
if ($('div#dropmenu').length == 0) {
$('#site_nav > ul > a').live('mouseenter', function () {
$(this).append("<div></div>");
$('#site_nav > ul > li a div').attr('id', 'dropmenu');
$('div#dropmenu').html("<ul></ul>");
$('div#dropmenu ul').html("<li><a>Mission</a></li><li><a>Story</a></li><li><a>Quality</a></li><li><a>Pledge</a></li><li><a>Bio</a></li>");
});
} else {
$('#site_nav > ul > li > a').append("");
}
});
You can remove the function handler after it's been executed. I gave the anonymous function a name for easier reference.
$(function () {
if ($('div#dropmenu').length == 0) {
$('#site_nav > ul > a').live('mouseenter', function f() {
$(this).append("<div></div>");
$('#site_nav > ul > li a div').attr('id', 'dropmenu');
$('div#dropmenu').html("<ul></ul>");
$('div#dropmenu ul').html("<li><a>Mission</a></li><li><a>Story</a></li><li><a>Quality</a></li><li><a>Pledge</a></li><li><a>Bio</a></li>");
$(this).die('mouseenter', f);
});
} else {
$('#site_nav > ul > li > a').append("");
}
});
You can also use the .one()
jQuery method to ensure that the event handler is executed only once.
$(function () {
if ($('div#dropmenu').length == 0) {
$('#site_nav > ul > a').one('mouseenter', function () {
$(this).append("<div></div>");
$('#site_nav > ul > li a div').attr('id', 'dropmenu');
$('div#dropmenu').html("<ul></ul>");
$('div#dropmenu ul').html("<li><a>Mission</a></li><li><a>Story</a></li><li><a>Quality</a></li><li><a>Pledge</a></li><li><a>Bio</a></li>");
});
} else {
$('#site_nav > ul > li > a').append("");
}
});
You are checking $('div#dropmenu').length == 0)
before you attach the event listener, after that, the listener is attached and will always execute. You can move the check inside the event listener.
$(function () {
$('#site_nav > ul > a').live('mouseenter', function () {
if ($('div#dropmenu').length == 0) {
$(this).append("<div></div>");
$('#site_nav > ul > li a div').attr('id', 'dropmenu');
$('div#dropmenu').html("<ul></ul>");
$('div#dropmenu ul').html("<li><a>Mission</a></li><li><a>Story</a></li><li><a>Quality</a></li><li><a>Pledge</a></li><li><a>Bio</a></li>");
} else {
$('#site_nav > ul > li > a').append("");
}
});
});
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