Javascript 如何使用jQuery过滤多个select组的结果？

我有两个选项，我正在尝试从现在开始筛选，但稍后将添加第三个选项，可能还会添加第四个选项（例如：现在我在价格和评论之间筛选，但希望在列表中添加更多价格，以及另一个筛选类别，如“评级”，由3、4或5颗星组成）

使用我在下面列出的逻辑可以很好地工作，但我觉得随着时间的推移，它会变得非常漫长和复杂（而且是不必要的）。我知道有一种方法可以重构代码我只是想知道最好的方法是什么？ HTML:

希望你能看到我想要什么，谢谢你的任何意见

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*EDIT:jsfiddle:

我可以想出两种不同的方法来简化代码并使其更易于维护和扩展：

您可以根据条件通过算法推导出应该隐藏或显示哪些项

您可以创建一个条件和操作表，这样添加一个新的条件和操作就是向表中添加一个新项

更改HTML，使其自我描述应该显示的内容

以下是表驱动方法的外观：

$('.reviews, .deals').change(function() {

    var allDeals = '.review-negative.deals-50, .review-positive.deals-50, .review-positive.deals-25, .review-negative.deals-25';

    var table = [
        {rv: 'reviews-all', dv: 'deals-all', show: '.review-positive, .review-negative, .deals-25, .deals-50'},
        {rv: 'reviews-positive', dv: '50', show: '.review-positive.deals-50'},
        {rv: 'reviews-negative', dv: '50', show: '.review-negative.deals-50'},
        {rv: 'reviews-positive', dv: '25', show: '.review-positive.deals-25'}
        {rv: 'reviews-negative', dv: '25', show: '.review-negative.deals-25'},
        {rv: 'reviews-positive', dv: 'deals-all', show: '.review-positive.deals-50, .review-positive.deals-25'},
        {rv: 'reviews-negative', dv: 'deals-all', show: '.review-negative.deals-50, .review-negative.deals-25'},
        {rv: 'reviews-all', dv: '50', show: '.review-negative.deals-50, .review-positive.deals-50'},
        {rv: 'reviews-all', dv: '25', show: '.review-negative.deals-25, .review-positive.deals-25'}
    ];

    var reviewsVal = $('.reviews :selected').val();
    var dealsVal = $('.deals :selected').val();

    $(allDeals).hide();

    var item, found = false;
    for (var i = 0, len = table.length; i < len; i++) {
        item = table[i];
        if (dealsVal == item.dv && reviewsVal == item.rv) {
            $(item.show).show();
            found = true;
            break;
        }
    }

    if (!found) {
        $('.review-positive, .review-negative, .deals-25, .deals-50').show();
    } 
});

---

警告：由于您没有提供代码/HTML的工作JSFIDLE示例来尝试此操作，因此未运行或检查此代码的键入错误。但是，希望您了解这两种方法。

要获得动态结果，标准化命名是最好的方法。 首先标准化条件选择器，为它们提供一个通用类，并使用id属性进行区分。还建议遵循值的命名转换。这将产生类似于

    <select id="deal" class="criteriaSelector">
      <option value="all">All deals</option>
      <option value="50">$50</option>
      <option value="25">$25</option>
    </select>

    <select id="review" class="criteriaSelector">
      <option value="all">All reviews</option>
      <option value="positive">Positive reviews</option>
      <option value="negative">Negative reviews</option>
    </select>

---

现在，只要遵循命名约定，添加新的条件选择器就不需要对这段代码进行更改。

您能为requiremnet发布JSFIDLE吗。。这可能更容易操作on@SarahM-我添加了第三个更简单的选项。在它中，您可以使选项自我描述它们应该显示/过滤的内容，这样代码就不必执行该操作。jfriend，非常感谢您的帮助和输入。两种回答都非常有效。

$('.reviews, .deals').change(function() {

    var allDeals = '.review-negative.deals-50, .review-positive.deals-50, .review-positive.deals-25, .review-negative.deals-25';

    var table = [
        {rv: 'reviews-all', dv: 'deals-all', show: '.review-positive, .review-negative, .deals-25, .deals-50'},
        {rv: 'reviews-positive', dv: '50', show: '.review-positive.deals-50'},
        {rv: 'reviews-negative', dv: '50', show: '.review-negative.deals-50'},
        {rv: 'reviews-positive', dv: '25', show: '.review-positive.deals-25'}
        {rv: 'reviews-negative', dv: '25', show: '.review-negative.deals-25'},
        {rv: 'reviews-positive', dv: 'deals-all', show: '.review-positive.deals-50, .review-positive.deals-25'},
        {rv: 'reviews-negative', dv: 'deals-all', show: '.review-negative.deals-50, .review-negative.deals-25'},
        {rv: 'reviews-all', dv: '50', show: '.review-negative.deals-50, .review-positive.deals-50'},
        {rv: 'reviews-all', dv: '25', show: '.review-negative.deals-25, .review-positive.deals-25'}
    ];

    var reviewsVal = $('.reviews :selected').val();
    var dealsVal = $('.deals :selected').val();

    $(allDeals).hide();

    var item, found = false;
    for (var i = 0, len = table.length; i < len; i++) {
        item = table[i];
        if (dealsVal == item.dv && reviewsVal == item.rv) {
            $(item.show).show();
            found = true;
            break;
        }
    }

    if (!found) {
        $('.review-positive, .review-negative, .deals-25, .deals-50').show();
    } 
});

$('.reviews, .deals').change(function() {
    var deals = ['25', '50'];

    function addAllDeals(base, prefix) {
        for (var i = 0; i < deals.length; i++) {
            if (base) base += ", ";
            base += prefix + deals[i];
        }
        return(base);
    }

    function addSingleDeal(prefixes, deal) {
        var sel = [];
        for (var i = 0; i < prefixes.length; i++) {
            sel.push(prefixes[i] + deal);
        }
        return(sel.join(", ");
    }

    var reviewsVal = $('.reviews :selected').val();
    var dealsVal = $('.deals :selected').val();
    var itemsToShow = "";

    // hide everything to start
    var initialHide = addAllDeals("", ".review-positive.deals-");
    initialHide = addAllDeals(initialHide, ".review-negative.deals-");
    $(initialHide).hide();

    if (reviewsVal == 'reviews-all') {
        if (dealsVal == 'deals-all') {
            itemsToShow = addAllDeals(".review-positive, .review-negative", ".deals-");
        } else {
            itemsToShow = addSingleDeal([".review-negative.deals-", ".review-negative.deals-"], dealsVal);
        }
    } else if (reviewsVal == 'reviews-positive') {
        itemsToShow = '.review-positive.deals-' + dealsVal;
    } else if (reviewVal == 'reviews-negative') {
        itemsToShow = '.review-negative.deals-' + dealsVal;
    } else {
        itemsToShow = addAllDeals(".review-positive, .review-negative", ".deals-");
    }
});

  <select class="deals">
    <option value="deals-all" data-base=".review-positive, .review-negative">All deals</option>
    <option value="50" data-base=".deals-50">$50</option>
    <option value="25" data-base=".deals-25">$25</option>
  </select>

  <select class="reviews">
    <option value="reviews-all" data-filter="">All reviews</option>
    <option value="reviews-positive" data-filter=".review-positive">Positive reviews</option>
    <option value="reviews-negative" data-filter=".review-negative">Negative reviews</option>
  </select>

 $('.reviews, .deals').change(function() {

    var dealsBase = $('.deals :selected').data("base");
    var reviewsFilter = $('.reviews :selected').data("filter");

     // hide all
     $(".review-negative, .review-positive").hide();

     // show the desired ones
     var base = $(dealsBase);
     if (reviewsFilter) {
         base = base.filter(reviewsFilter);
     }
     base.show();
});

    <select id="deal" class="criteriaSelector">
      <option value="all">All deals</option>
      <option value="50">$50</option>
      <option value="25">$25</option>
    </select>

    <select id="review" class="criteriaSelector">
      <option value="all">All reviews</option>
      <option value="positive">Positive reviews</option>
      <option value="negative">Negative reviews</option>
    </select>

    <div class="item review-positive deal-25"></div>
    <div class="item review-negative deal-50"></div>

    $('.criteriaSelector').change(function() {
      // Initialize criteria string
      var criteria = '';
      // Set value for all selector
      var showAll = true;

      // Iterate over all criteriaSelectors
      $('.criteriaSelector').each(function(){
        // Get value
        var val = $(this).children(':selected').val();
        // Check if this limits our results
        if(val !== 'all'){
          // Append selector to criteria
          criteria += '.' + $(this).attr('id') + '-' + val;
          // We don't want to show all results anymore
          showAll = false;
        }
      });
      // Check if results are limited somehow
      if(showAll){
        // No criterias were set so show all
        $('.item').show();
      } else {
        // Hide all items
        $('.item').hide();
        // Show the ones that were selected
        $(criteria).show();
      }

    });