我将如何定位香草 JS 中点击区域的最近子元素方面？

Question

基于，我又提出了一个问题。虽然这两个问题几乎相似，但它们是不同的。

我将如何定位香草 js 中点击区域最近的子元素方面意味着： 我将点击 li 元素的外侧和 ul 元素和最近的 li 将成为目标..在示例代码下面..

注意：Jqueryfind方法无法解决问题。我试过了，但它一直重复相同的元素。

我努力实现的目标

如下图红色标记区域：当我点击最近的红色标记区域时li将是目标元素。这就是我想要的......我没有解决问题。我认为一切皆有可能.. css & js...

中有如此多的选择器可用

示例代码

$(".amenities-filters-inner").each(function(i, el) {
  $(el).on("click", function(event) {
    event.preventDefault()
    var element = null;
    element = $(event.target).closest(".amenity_id");
    element = $(element).children().children().next();

    if ($(element).checked == true)
      $(element).checked = false;
    else {
      $(element).checked = true;
    }

    let dataId = null;
    if (element.hasClass('amenity_data')) {
      dataId = $(element).data('index');

    } else {
      element = $(event.target).find(".amenity_id");
      element = $(element).children().children().next();
      dataId = $(element).data('index');

    }

    console.log('$ el:' + element)
    console.log('$ index:' + dataId)
  })
});

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-index');
    console.log('js el' + element)
    console.log('js index ' + 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 {
  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);
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<div class="amenities-filters-inner">
  <ul>
    <li class="amenity_id">
      <label class="check ">One <strong>One</strong>
        <input type="checkbox" class="amenity_data" data-index="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-index="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-index="3" name="is_name">
        <span class="checkmark"></span>
      </label>
    </li>
  </ul>
</div>

Answer 1

有两种方法。

首先是检测点击发生的位置：

window.onclick = function(event)
{
 if (event.which && event.which==1)
 {
  console.log(event.clientX);
  console.log(event.clientY);
 }
}

然后你可以在这个古怪的尝试中迭代

var label = document.getElementsByTagName('label');

for (var i = 0; i < label.length; i++)
{
 console.log(label[i].getBoundingClientRect());
}

然而那将毫无意义，因为：

您只是猜测用户可能打算选择一个选项。
它忽略了 GUI（图形用户界面）的样式不适合可用性这一事实。
可能没有问“这对客户有帮助吗？”

表单字段之间有一些 margin 是可以接受的。如果您觉得人们很难点击它们，请添加 padding、增加 font-size 或 两者都做 。

Answer 2

我认为这可以实现您所追求的目标：

请注意，单击关闭一个复选框然后关闭另一个复选框将选中两个复选框，但您当然可以更改它。

document.querySelectorAll(".amenities-filters-inner").forEach(function(item) {
  item.addEventListener("click", function(e) {
    e.preventDefault();
    let element = null;
    var lis = document.getElementsByClassName("amenity_id");
    for (var i = 0; i < lis.length; i++) {
        var current = lis[i];
      var next = lis[i+1];
      var currentBox = current.getBoundingClientRect();
      var nextBox = next && next.getBoundingClientRect();
      if (clickedBeforeFirstCheckbox(e, i == 0, currentBox) ||  
            clickedAfterLastCheckbox(e, i == lis.length-1, currentBox) ||
          clickedInBetween(e, currentBox, nextBox)) {
          setCheckboxByDistance(e, current, next, currentBox, nextBox);
            break;
      }
    }
  })
});

function clickedBeforeFirstCheckbox(e, isFirst, currentBox) {
    return isFirst && e.clientY < currentBox.y;
}
function clickedAfterLastCheckbox(e, isLast, currentBox) {
    return isLast && e.clientY > currentBox.y;
}
function clickedInBetween(e, currentBox, nextBox) {
    return e.clientY > currentBox.y && 
          e.clientY < nextBox.y;
}

function setCheckboxByDistance(e, current, next, currentBox, nextBox) {
  var diffToCurrent = 
    Math.abs(e.clientY - (currentBox.y + (currentBox.height / 2)));
  var diffToNext =  nextBox ? 
    Math.abs(e.clientY - (nextBox.y + (nextBox.height / 2))) : 
    Number.MAX_SAFE_INTEGER;
  if (diffToCurrent < diffToNext) {
    var checkbox = current.querySelector('input');
    checkbox.checked = !checkbox.checked;
  } else {
    var checkbox = next.querySelector('input');
    checkbox.checked = !checkbox.checked;
  }
}

.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 {
  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-index="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-index="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-index="3" name="is_name">
        <span class="checkmark"></span>
      </label>
    </li>
  </ul>
</div>

我将如何定位香草 JS 中点击区域的最近子元素方面？

How will I target the nearest child element aspect of on click area in vanilla JS?

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