奇怪的按字母顺序排序复选框列表

Question

我有4个复选框，每个复选框代表一个区域。点击其中任何一个显示与该地区相关的3个国家/地区。单击区域复选框的组合可以显示所有相关的国家/地区，但我想要 国家/地区复选框列表，始终按字母顺序显示。

奇怪的是，我的jquery似乎适用于3个区域复选框，但似乎并不适用于4.我只是看不出我犯了什么愚蠢的错误，并开始怀疑更多的东西险恶。这是我的小提琴：https://jsfiddle.net/m5v7v6kv/

感谢您的帮助。

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function sortByText(a, b) {
    return $.trim($(a).text()) > $.trim($(b).text());
}

var li = $(".CountryWrapper").children("label").detach().sort(sortByText)
$(".CountryWrapper").append(li)

$('input[type="checkbox"]').click(function() {
    $('.my' + $(this).attr("id")).slideToggle(200)
})

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.CountryWrapper {
    border: 1px solid blue;
    height: 150px;
    width: 480px;
    border: 1px solid blue;
}
.myEuropeCountries {
    display: none;
}
.myNAMCountries {
    display: none;
}
.mySAMCountries {
    display: none;
}
.myAfricaMECountries {
    display: none;
}

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<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<label><input type="checkbox" id="EuropeCountries" />Europe</label>
<label><input type="checkbox" id="NAMCountries" />North America</label>
<label><input type="checkbox" id="SAMCountries" />South America</label>
<label><input type="checkbox" id="AfricaMECountries" />Africa and Middle East</label>

<div class="CountryWrapper">
    <br>
    <label class="myEuropeCountries"><input type="checkbox" value="Spain" />Spain</label>
    <label class="myEuropeCountries"><input type="checkbox" value="Germany" />Germany</label>
    <label class="myEuropeCountries"><input type="checkbox" value="Austria" />Austria</label>
    
    <label class="myNAMCountries"><input type="checkbox" value="USA" />USA</label>
    <label class="myNAMCountries"><input type="checkbox" value="Mexico" />Mexico</label>
    <label class="myNAMCountries"><input type="checkbox" value="Canada" />Canada</label>

    <label class="mySAMCountries"><input type="checkbox" value="Brazil" />Brazil</label>
    <label class="mySAMCountries"><input type="checkbox" value="Argentina" />Argentina</label>
    <label class="mySAMCountries"><input type="checkbox" value="Chile" />Chile</label>

    <label class="myAfricaMECountries"><input type="checkbox" value="SouthAfrica" />South Africa</label>
    <label class="myAfricaMECountries"><input type="checkbox" value="Egypt" />Egypt</label>
    <label class="myAfricaMECountries"><input type="checkbox" value="SaudiArabia" />Saudi Arabia</label>
</div>

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Answer 1

看起来你的比较函数应该返回1或-1。除非两个国家/地区具有相同的名称，否则没有理由在您的情况下返回0。

return $.trim($(a).text()) > $.trim($(b).text()) ? 1 : -1;

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function sortByText(a, b) {
  return $.trim($(a).text()) > $.trim($(b).text()) ? 1 : -1;
}

var li = $(".CountryWrapper").children("label").detach().sort(sortByText)
$(".CountryWrapper").append(li)

$('input[type="checkbox"]').click(function() {
  $('.my' + $(this).attr("id")).slideToggle(200)
})

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.CountryWrapper {
  border: 1px solid blue;
  height: 150px;
  width: 480px;
  border: 1px solid blue;
}

.myEuropeCountries {
  display: none;
}

.myNAMCountries {
  display: none;
}

.mySAMCountries {
  display: none;
}

.myAfricaMECountries {
  display: none;
}

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<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<label>
  <input type="checkbox" id="EuropeCountries" />Europe</label>

<label>
  <input type="checkbox" id="NAMCountries" />North America</label>

<label>
  <input type="checkbox" id="SAMCountries" />South America</label>

<label>
  <input type="checkbox" id="AfricaMECountries" />Africa and Middle East</label>

<!-------------------------------------------------------------------->

<div class="CountryWrapper">

  <br>
  <label class="myEuropeCountries">
    <input type="checkbox" value="Spain" />Spain</label>
  <label class="myEuropeCountries">
    <input type="checkbox" value="Germany" />Germany</label>
  <label class="myEuropeCountries">
    <input type="checkbox" value="Austria" />Austria</label>

  <label class="myNAMCountries">
    <input type="checkbox" value="USA" />USA</label>
  <label class="myNAMCountries">
    <input type="checkbox" value="Mexico" />Mexico</label>
  <label class="myNAMCountries">
    <input type="checkbox" value="Canada" />Canada</label>

  <label class="mySAMCountries">
    <input type="checkbox" value="Brazil" />Brazil</label>
  <label class="mySAMCountries">
    <input type="checkbox" value="Argentina" />Argentina</label>
  <label class="mySAMCountries">
    <input type="checkbox" value="Chile" />Chile</label>

  <label class="myAfricaMECountries">
    <input type="checkbox" value="SouthAfrica" />South Africa</label>
  <label class="myAfricaMECountries">
    <input type="checkbox" value="Egypt" />Egypt</label>
  <label class="myAfricaMECountries">
    <input type="checkbox" value="SaudiArabia" />Saudi Arabia</label>

</div>

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