我尝试在ul
元素中动态生成/创建类名,并且成功获得了预期的结果,可以在代码片段的控制台中看到以供参考。
但是,如果ul
是在li
元素下生成的,我会尝试创建相同的类名。例如,有一个li
具有类名的元素,"a"
如果我们ul
在同一个元素下创建多个元素,li
则类名ul
应该与下面相同,而不是计算类。
我需要的结果:
<li class="a">
<a href="/">First</a>
<ul class="main-nav-list">
<li class="b">
<a href="/">Type of menu</a>
<ul class="main-nav-list ul-1"> //The ul-1 should be static (even after dyanmic class generated) to the next ul li example if ul-1 one come the next li with ul should also have the same class ul-1
<li class="c"><a href="/">Summer</a></li>
</ul>
</li>
<li class="b">
<a href="/">Type of menu</a>
<ul class="main-nav-list ul-1">
<li class="c"><a href="/">Summer</a></li>
</ul>
</li>
到目前为止我尝试过的代码
var ul = document.querySelectorAll(".main-nav ul");
ul.forEach((each, i) => {
each.classList.add("ul-" + i);
console.log(each)
});
<nav class="main-nav">
<ul class="main-nav-list">
<li class="a">
<a href="/">First</a>
<ul class="main-nav-list">
<li class="b">
<a href="/">Type of menu</a>
<ul class="main-nav-list">// In my case, if the class is ul-1 then next li ul is generating as ul-2 but i want it to be same in the both the li component
<li class="c"><a href="/">Summer</a></li>
</ul>
</li>
<li class="b">
<a href="/">Type of menu</a>
<ul class="main-nav-list">
<li class="c"><a href="/">Summer</a></li>
</ul>
</li>
</ul>
</li>
</ul>
</nav>
如果第一个 Ul 具有 ul-0 类,那么下一个 ul 也应该具有 ul-0 作为一个类。任何帮助将不胜感激 !!
您必须选择每个li
并为每个迭代其ul
s,然后将您想要的任何类添加到它们。
// selecting li's of main ul in the page
var lis = document.querySelectorAll(".main-nav>ul>li");
lis.forEach((each) => {
// selecting all uls inside each li
let innerUls = each.querySelectorAll(`:scope>ul`)
// adding class name to each ul
innerUls.forEach((itm, index) => {
itm.classList.add("ul-" + index);
})
});
<nav class="main-nav">
<ul class="main-nav-list">
<li class="a">
<a href="/">First</a>
<ul class="main-nav-list">
<li class="b">
<a href="/">Type of menu</a>
<ul class="main-nav-list">// In my case, if the class is ul-1 then next li ul is generating as ul-2 but i want it to be same in the both the li component
<li class="c"><a href="/">Summer</a></li>
</ul>
</li>
<li class="b">
<a href="/">Type of menu</a>
<ul class="main-nav-list">
<li class="c"><a href="/">Summer</a></li>
</ul>
</li>
</ul>
</li>
<li class="a">
<a href="/">Second</a>
<ul class="main-nav-list">
<li class="b">
<a href="/">Type of menu</a>
<ul class="main-nav-list">// In my case, if the class is ul-1 then next li ul is generating as ul-2 but i want it to be same in the both the li component
<li class="c"><a href="/">Summer</a></li>
</ul>
</li>
<li class="b">
<a href="/">Type of menu</a>
<ul class="main-nav-list">
<li class="c"><a href="/">Summer</a></li>
</ul>
</li>
</ul>
<ul class="main-nav-list">
<li class="b">
<a href="/">Type of menu</a>
<ul class="main-nav-list">// In my case, if the class is ul-1 then next li ul is generating as ul-2 but i want it to be same in the both the li component
<li class="c"><a href="/">Summer</a></li>
</ul>
</li>
<li class="b">
<a href="/">Type of menu</a>
<ul class="main-nav-list">
<li class="c"><a href="/">Summer</a></li>
</ul>
</li>
</ul>
<ul class="main-nav-list">
<li class="b">
<a href="/">Type of menu</a>
<ul class="main-nav-list">// In my case, if the class is ul-1 then next li ul is generating as ul-2 but i want it to be same in the both the li component
<li class="c"><a href="/">Summer</a></li>
</ul>
</li>
<li class="b">
<a href="/">Type of menu</a>
<ul class="main-nav-list">
<li class="c"><a href="/">Summer</a></li>
</ul>
</li>
</ul>
</li>
</ul>
</nav>
更新
以ul
递归方式将类添加到s
let classNames = ['a', 'b', 'c', 'd', 'e'];
function addClassToUls(ul, level) {
var lis = ul.querySelectorAll(':scope>li');
lis.forEach((each) => {
// selecting all uls inside each li
let innerUls = each.querySelectorAll(`:scope>ul`)
// adding class name to each ul
innerUls.forEach((itm, index) => {
itm.classList.add(`ul-${level}-${classNames[index]}`);
addClassToUls(itm, level+1);
})
})
}
let mainUls = document.querySelectorAll(".main-nav>ul");
mainUls.forEach(ul => addClassToUls(ul, 1))
<nav class="main-nav">
<ul class="main-nav-list">
<li class="a">
<a href="/">First</a>
<ul class="main-nav-list">
<li class="b">
<a href="/">Type of menu</a>
<ul class="main-nav-list">// In my case, if the class is ul-1 then next li ul is generating as ul-2 but i want it to be same in the both the li component
<li class="c"><a href="/">Summer</a></li>
</ul>
</li>
<li class="b">
<a href="/">Type of menu</a>
<ul class="main-nav-list">
<li class="c"><a href="/">Summer</a></li>
</ul>
</li>
</ul>
</li>
<li class="a">
<a href="/">Second</a>
<ul class="main-nav-list">
<li class="b">
<a href="/">Type of menu</a>
<ul class="main-nav-list">// In my case, if the class is ul-1 then next li ul is generating as ul-2 but i want it to be same in the both the li component
<li class="c"><a href="/">Summer</a></li>
</ul>
</li>
<li class="b">
<a href="/">Type of menu</a>
<ul class="main-nav-list">
<li class="c"><a href="/">Summer</a></li>
</ul>
</li>
</ul>
<ul class="main-nav-list">
<li class="b">
<a href="/">Type of menu</a>
<ul class="main-nav-list">// In my case, if the class is ul-1 then next li ul is generating as ul-2 but i want it to be same in the both the li component
<li class="c"><a href="/">Summer</a></li>
</ul>
</li>
<li class="b">
<a href="/">Type of menu</a>
<ul class="main-nav-list">
<li class="c"><a href="/">Summer</a></li>
</ul>
</li>
</ul>
<ul class="main-nav-list">
<li class="b">
<a href="/">Type of menu</a>
<ul class="main-nav-list">// In my case, if the class is ul-1 then next li ul is generating as ul-2 but i want it to be same in the both the li component
<li class="c"><a href="/">Summer</a></li>
</ul>
</li>
<li class="b">
<a href="/">Type of menu</a>
<ul class="main-nav-list">
<li class="c"><a href="/">Summer</a></li>
</ul>
</li>
</ul>
</li>
</ul>
</nav>
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