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优化 nav 代码书写规范

pull/1407/head
贤心 2023-10-25 09:15:58 +08:00
parent 1a4a68a1d2
commit 0e233970e7
1 changed files with 76 additions and 64 deletions
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64
src/modules/element.js
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@ -359,48 +359,57 @@ layui.define('jquery', function(exports){
// 导航菜单
,nav: function(){
var TIME = 200, timer = {}, timerMore = {}, timeEnd = {}, NAV_TITLE = 'layui-nav-title'
var TIME = 200;
var timer = {};
var timerMore = {};
var timeEnd = {};
var NAV_TITLE = 'layui-nav-title';
// 滑块跟随
,follow = function(bar, nav, index){
var othis = $(this), child = othis.find('.'+NAV_CHILD);
var follow = function(bar, nav, index) {
var othis = $(this);
var child = othis.find('.'+NAV_CHILD);
// 是否垂直导航菜单
if (nav.hasClass(NAV_TREE)) {
// 无子菜单时跟随
if (!child[0]) {
var thisA = othis.children('.'+ NAV_TITLE);
bar.css({
top: othis.offset().top - nav.offset().top
,height: (thisA[0] ? thisA : othis).outerHeight()
,opacity: 1
top: othis.offset().top - nav.offset().top,
height: (thisA[0] ? thisA : othis).outerHeight(),
opacity: 1
});
}
} else {
child.addClass(NAV_ANIM);
// 若居中对齐
if(child.hasClass(NAV_CHILD_C)) child.css({
if (child.hasClass(NAV_CHILD_C)) {
child.css({
left: -(child.outerWidth() - othis.width()) / 2
});
}
// 滑块定位
if (child[0]) { // 若有子菜单，则滑块消失
bar.css({
left: bar.position().left + bar.width()/2
,width: 0
,opacity: 0
left: bar.position().left + bar.width() / 2,
width: 0,
opacity: 0
});
} else { // bar 跟随
bar.css({
left: othis.position().left + parseFloat(othis.css('marginLeft'))
,top: othis.position().top + othis.height() - bar.height()
left: othis.position().left + parseFloat(othis.css('marginLeft')),
top: othis.position().top + othis.height() - bar.height()
});
}
// 渐显滑块并适配宽度
timer[index] = setTimeout(function() {
bar.css({
width: child[0] ? 0 : othis.width()
,opacity: child[0] ? 0 : 1
width: child[0] ? 0 : othis.width(),
opacity: child[0] ? 0 : 1
});
}, device.ie && device.ie < 10 ? 0 : TIME);
@ -418,23 +427,24 @@ layui.define('jquery', function(exports){
// 遍历导航
$(NAV_ELEM + elemFilter).each(function(index) {
var othis = $(this)
,bar = $('<span class="'+ NAV_BAR +'"></span>')
,itemElem = othis.find('.'+NAV_ITEM);
var othis = $(this);
var bar = $('<span class="'+ NAV_BAR +'"></span>');
var itemElem = othis.find('.'+NAV_ITEM);
// hover 滑动效果
if (!othis.find('.'+NAV_BAR)[0]) {
othis.append(bar);
( othis.hasClass(NAV_TREE)
? itemElem.find('dd,>.'+ NAV_TITLE)
: itemElem).on('mouseenter', function(){
: itemElem
).on('mouseenter', function() {
follow.call(this, bar, othis, index);
}).on('mouseleave', function() { // 鼠标移出
// 是否为垂直导航
if (othis.hasClass(NAV_TREE)) {
bar.css({
height: 0
,opacity: 0
height: 0,
opacity: 0
});
} else {
// 隐藏子菜单
@ -445,14 +455,16 @@ layui.define('jquery', function(exports){
}, 300);
}
});
// 鼠标离开当前菜单时
othis.on('mouseleave', function() {
clearTimeout(timer[index])
timeEnd[index] = setTimeout(function() {
if (!othis.hasClass(NAV_TREE)) {
bar.css({
width: 0
,left: bar.position().left + bar.width()/2
,opacity: 0
width: 0,
left: bar.position().left + bar.width() / 2,
opacity: 0
});
}
}, TIME);
@ -461,9 +473,9 @@ layui.define('jquery', function(exports){
// 展开子菜单
itemElem.find('a').each(function() {
var thisA = $(this)
,parent = thisA.parent()
,child = thisA.siblings('.'+NAV_CHILD);
var thisA = $(this);
var parent = thisA.parent();
var child = thisA.siblings('.'+ NAV_CHILD);
// 输出小箭头
if (child[0] && !thisA.children('.'+ NAV_MORE)[0]) {