有没有一种方法可以使HTML5数据列表使用模糊搜索? [英] Is there a way to make an HTML5 datalist use a fuzzy search?

问题描述

我有一组要在搜索时进行模糊匹配的数据列表选项.例如，如果我输入"PHP HTML"，或"PHPAndHTML"我希望这些都与"PHP And HTML"(PHP和HTML)匹配.选项.有什么办法吗?请参见此小提琴或以下代码作为示例.

I have a set of datalist options that I would like to fuzzy match when searching. For instance, if I type "PHP HTML" or "PHPAndHTML" I would like either of those to match the "PHP And HTML" option. Is there any way to do this? Please see this fiddle or the code below for an example.

<h1>Datalist Demo</h1>
<label for="default">Pick a programming language</label>
<input type="text" id="default" list="languages">
<datalist id="languages">
    <option value="HTML">
    <option value="CSS">
    <option value="JavaScript">
    <option value="Java">
    <option value="Ruby And Go">
    <option value="PHP And HTML">
    <option value="Go">
    <option value="Erlang">
    <option value="Python And C++">
    <option value="C">
    <option value="C#">
    <option value="C++">
</datalist>

我想使用本地数据列表而不是自定义库来执行此操作.原因是，在我的实际场景中，我的页面上有数百个输入都使用相同的数据列表，而使用自定义库会占用大量CPU，而如果我将所有输入都绑定到单个数据列表，则实际上

I want to do this with a native datalist instead of a custom library. The reason being is that in my real-world scenario I have hundreds of inputs on my page that all use the same datalist, and with custom libraries it becomes very CPU intensive, whereas if I tie all inputs to a single datalist it is actually very efficient.

推荐答案

数据列表匹配行为不可自定义.

Datalist matching behavior is not customizable.

即使您尝试强制下拉菜单可见，也不会显示.

Even when you try and force the dropdown to be visible, it won't.

$(document).on('keyup', '#default', function() {
  let val = this.value.split(/[\s]+|(?=[A-Z][a-z])|(?<=[a-z])(?=[A-Z])/),
    reg = '';
  val.forEach(function(entry) {
    if (entry != '')
      reg += '.*' + entry + '.*'
  });

  var datalist = $('#languages option');
  $.each(datalist, function(i) {
    var option = datalist[i].value;
    if (!option.match(reg)) {
      $(datalist[i]).hide()
    } else {
      $(datalist[i]).show()
      $('#languages').show()
      console.log(datalist[i].value)
    }
  });
});

<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.5.1/jquery.js" integrity="sha256-QWo7LDvxbWT2tbbQ97B53yJnYU3WhH/C8ycbRAkjPDc=" crossorigin="anonymous"></script>
<h1>Datalist Demo</h1>
<label for="default">Pick a programming language</label>
<input type="text" id="default" list="languages">
<datalist id="languages" open="open">
    <option value="HTML">
    <option value="CSS">
    <option value="JavaScript">
    <option value="Java">
    <option value="Ruby And Go">
    <option value="PHP And HTML">
    <option value="Go">
    <option value="Erlang">
    <option value="Python And C++">
    <option value="C">
    <option value="C#">
    <option value="C++">
</datalist>

随时测试上面的代码，键入时，根据正则表达式显示/隐藏正确的值.但是数据列表不可见.

Feel free to test the code above, when you type, the right values are shown/hidden depending on the regex. But the datalist isn't being visible.

据说另一个答案也做了类似的事情，但即使这个答案也不能奏效，以证明我的观点. https://stackoverflow.com/questions/42592978/how-to-make-datalist-match-result-from-beginning-only

Another answer supposedly did something similar, but even that answer doesn't work, to prove my point. https://stackoverflow.com/questions/42592978/how-to-make-datalist-match-result-from-beginning-only

如果您要具有可自定义的行为，我建议在此特定用例中使用插件.

I would suggest relying on plugins for this particular use case if you want to have a customizable behavior.

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