如何过滤多个元素/项目 [英] How to filter multiple elements/items

问题描述

我正在尝试一次过滤多个项目.例如水果和动物，甚至3+.到目前为止，只能一次选择一项来完成，如何选择一项以上呢?我也尝试过 https://wch.io/static/tagsort/demo-stacks/index.html ，但是它一直被错误地显示文本，但是在javascript中应该是这样吗?

I'm trying to filter multiple items at once. For example fruits and animals or even 3+. So far it only does it by selecting one item at a time.How can I select more than one? I have also tried https://wch.io/static/tagsort/demo-stacks/index.html but it was bugged keept showing the text but this how it should be but in javascript?

filterSelection("all")
function filterSelection(c) {
  var x, i;
  x = document.getElementsByClassName("filterDiv");
  if (c == "all") c = "";
  for (i = 0; i < x.length; i++) {
    w3RemoveClass(x[i], "show");
    if (x[i].className.indexOf(c) > -1) w3AddClass(x[i], "show");
  }
}

function w3AddClass(element, name) {
  var i, arr1, arr2;
  arr1 = element.className.split(" ");
  arr2 = name.split(" ");
  for (i = 0; i < arr2.length; i++) {
    if (arr1.indexOf(arr2[i]) == -1) {element.className += " " + arr2[i];}
  }
}

function w3RemoveClass(element, name) {
  var i, arr1, arr2;
  arr1 = element.className.split(" ");
  arr2 = name.split(" ");
  for (i = 0; i < arr2.length; i++) {
    while (arr1.indexOf(arr2[i]) > -1) {
      arr1.splice(arr1.indexOf(arr2[i]), 1);     
    }
  }
  element.className = arr1.join(" ");
}

.filterDiv {
  float: left;
  background-color: #2196F3;
  color: #ffffff;
  width: 100px;
  line-height: 100px;
  text-align: center;
  margin: 2px;
  display: none;
}

.show {
  display: block;
}

.container {
  margin-top: 20px;
  overflow: hidden;
}

<h2>Filter DIV Elements</h2>

<input type="radio" onclick="filterSelection('all')" name="category" checked> Show all<br>
<input type="radio" onclick="filterSelection('cars')" name="category"> Cars<br>
<input type="radio" onclick="filterSelection('animals')" name="category"> Animals<br>
<input type="radio" onclick="filterSelection('fruits')" name="category"> Fruits<br>
<input type="radio" onclick="filterSelection('colors')" name="category"> Colors<br>

<div class="container">
  <div class="filterDiv cars">BMW</div>
  <div class="filterDiv colors fruits">Orange</div>
  <div class="filterDiv cars">Volvo</div>
  <div class="filterDiv colors">Red</div>
  <div class="filterDiv cars animals">Mustang</div>
  <div class="filterDiv colors">Blue</div>
  <div class="filterDiv animals">Cat</div>
  <div class="filterDiv animals">Dog</div>
  <div class="filterDiv fruits">Melon</div>
  <div class="filterDiv fruits animals">Kiwi</div>
  <div class="filterDiv fruits">Banana</div>
  <div class="filterDiv fruits">Lemon</div>
  <div class="filterDiv animals">Cow</div>
</div>

推荐答案

输入中缺少属性 ID .

属性 name 将收音机分组，并且一次只能检查一个收音机，但它本身不能帮助通过Submit或javascript处理输入.

the attribute name groups the radio and allows only one to be checked at once but it will not help on its own to treat the inputs via a submit or javascript.

您可以使用CSS :checked 选择接下来要使用的兄弟姐妹，如果它们仅与视觉有关(无需提交或通过js处理)，但仍需要一个ID才能正常工作.

You can use CSS :checked to select siblings coming next if its only about visual(nothing submit or to treat via js) but it will still require an id in order to work as expected.

带有复选框的示例:

#all:checked  ~ .container .filterDiv{
  display: block;
}


.filterDiv, :not(#all):checked ~ .container  .filterDiv{
  float: left;
  background-color: #2196F3;
  color: #ffffff;
  width: 100px;
  line-height: 100px;
  text-align: center;
  margin: 2px;
  display: none;
}

#cars:checked ~ .container .cars,
#animals:checked ~ .container .animals,
#fruits:checked ~ .container .fruits,
#color:checked ~ .container .colors{
  display: block;
}

.container {
  margin-top: 20px;
  overflow: hidden;
}

<h2>Filter DIV Elements</h2>

<input type="checkbox"  id="all"  checked> Show all<br>
<input type="checkbox" id="cars"> Cars<br>
<input type="checkbox"  id="animals"> Animals<br>
<input type="checkbox"  id="fruits"  > Fruits<br>
<input type="checkbox" id="color" > Colors<br>

<div class="container">
  <div class="filterDiv cars">BMW</div>
  <div class="filterDiv colors fruits">Orange</div>
  <div class="filterDiv cars">Volvo</div>
  <div class="filterDiv colors">Red</div>
  <div class="filterDiv cars animals">Mustang</div>
  <div class="filterDiv colors">Blue</div>
  <div class="filterDiv animals">Cat</div>
  <div class="filterDiv animals">Dog</div>
  <div class="filterDiv fruits">Melon</div>
  <div class="filterDiv fruits animals">Kiwi</div>
  <div class="filterDiv fruits">Banana</div>
  <div class="filterDiv fruits">Lemon</div>
  <div class="filterDiv animals">Cow</div>
</div>

这是我的老笔通过 radio对画廊进行分类 input 和 label 位于 form 中，因此可以在服务器端或通过javascript提交和处理选择.您可以从使用表单和广播的链接的Codepen中激发自己的灵感.

Here is an old pen of mine sorting gallerie via radio input and labels inside a form , so selection can be submited and treated on server side or via javascript. You can inspire yourself from the linked codepen where form and radio are used.

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