为什么js最接近的方法找不到同级元素? [英] why js closest method not find sibling element?
问题描述
注意:据我所知, closest()
方法在DOM树中搜索与指定CSS选择器匹配的最近元素.
Note: as far as i know that closest()
method searches up the DOM tree for the closest element which matches a specified CSS selector.
当我单击两个 li
元素之间的 margin
空格时..它返回null ...但是如果我用 padding-bottom
替换 margin-bottom:15px;
...一切都很好...
When i click on margin
space between two li
element .. it's return null...
but if i replace margin-bottom: 15px;
with padding-bottom
... everything is okay...
CSS代码
.amenities-filters-inner ul li{
margin-bottom: 15px;
}
图片,如果我单击红色标记区域..,则找不到同级 li
元素..
Image if i click on red mark area.. it's not found sibling li
element ..
示例代码
document.querySelectorAll(".amenities-filters-inner ").forEach(function(item){
item.addEventListener("click",function(e){
e.preventDefault();
let element = null;
element = e.target.closest(".amenity_id");
// element = e.target.querySelector(".amenity_id");
element = element.children[0].children[1];
element.checked == true ? element.checked = false : element.checked =true;
let dataId = + element.getAttribute('data-id');
console.log(element)
console.log(dataId)
})
})
.amenities-filters-inner{
border: 2px dashed royalblue;
max-width: 300px;
padding: 1rem;
}
ul{
list-style: none;
width: 100%;
margin: 0;
padding: 0;
}
li{
border: 2px solid rgb(133, 129, 129);
padding: 3px;
}
.amenities-filters-inner:last-child{
margin-bottom: 0;
}
.amenities-filters-inner ul li{
margin-bottom: 20px;
}
.amenities-filters-inner ul li:last-child{
margin-bottom: 0;
}
.check {
display: flex;
align-items: center;
justify-content: space-between;
position: relative;
padding-left: 31px;
margin-bottom: 0;
padding-right: 0;
cursor: pointer;
font-size: 14px;
color: #646464;
}
.check strong{
color: #969696;
font-size: 14px;
font-weight: 400;
}
.check input {
position: absolute;
opacity: 0;
cursor: pointer;
}
.checkmark {
position: absolute;
top: 0;
left: 0;
height: 17px;
width: 17px;
background-color: #fff ;
border-color: #646464;
border-style:solid;
border-width:1px;
border-radius: 2px;
}
.check input:checked ~ .checkmark {
background-color: #fff;
border-color: #007FEB;
}
.checkmark:after {
content: "";
position: absolute;
display: none;
}
.check input:checked ~ .checkmark:after {
display: block;
}
.check .checkmark:after {
left: 5px;
top: 1px;
width: 5px;
height: 10px;
border: solid ;
border-color:#007FEB;
border-width: 0 2px 2px 0;
-webkit-transform: rotate(45deg);
-ms-transform: rotate(45deg);
transform: rotate(45deg);
}
<div class="amenities-filters-inner">
<ul>
<li class="amenity_id">
<label class="check ">One <strong>One</strong>
<input type="checkbox" class="amenity_data" data-id="1" name="is_name">
<span class="checkmark"></span>
</label>
</li>
<li class="amenity_id">
<label class="check ">Two <strong>Two</strong>
<input type="checkbox" class="amenity_data" data-id="2"name="is_name">
<span class="checkmark"></span>
</label>
</li>
<li class="amenity_id">
<label class="check ">Three<strong>Three</strong>
<input type="checkbox" class="amenity_data" data-id="3"name="is_name">
<span class="checkmark"></span>
</label>
</li>
</ul>
</div>
推荐答案
.closest方法仅遍历父级,而不遍历子级.
.closest method only traverses parents, not children.
该区域位于.amenities-filters-inner容器中,而不位于list元素内,因此不会找到.amenities-id
That area is in container .amenities-filters-inner not inside list element, so it won't find the .amenities-id
更改容器的背景色以进行调试.
Change the background color of container to debug.
.amenities-filters-inner{
background: red;
}
如果您不希望列表项之间出现间隙,请不要使用边距.如果要制作
If you don't want gaps between list items, don't use margin. Use padding-top and padding-bottom instead, if you want to make the
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