按价格、升序和降序排序时向标签添加动态文本

Question

我设法在我的商店网站上添加了一个按价格对产品进行分类的按钮（不太了解 javascript）。

我希望它更新按钮中的文本以向用户传达按价格排序是升序还是降序，例如：“按价格排序：升序”

这是排序按钮的 html：

    <button type="button" class="btn btn-outline-secondary">
      <a class="sortByPrice" href="#art-for-sale">Sort by Price</a>
    </button>

这是第一个产品的html：

  <div class="row results">
    <div class="col-md-4 product">
      <div class="card mb-4 shadow-sm">
        <img src='images_organised_small/for_sale_small/3opera_house_night_500.jpg'>
        <div class="card-body">
          <span class="card-text title">Opera House Night</span>
          <p class="card-text price">$500</p>
          <p class="card-text description">insert artwork description here not too long but not too short!</p>
          <div class="d-flex justify-content-between align-items-center">
            <div class="btn-group">
              <button type="button" onClick="window.open('https://www.paypal.me/meredithscott4/500');" class="btn btn-sm btn-outline-secondary">Buy</button>
              <button type="button" onClick="window.open('images_organised_large/for_sale_large/3opera_house_night_500.jpg');" class="btn btn-sm btn-outline-secondary">View</button>
            </div>
            <small class="text-muted">9 mins</small>
          </div>
        </div>
      </div>
    </div>

这是 javascript

var ascending = false;

$('.tab-content').on('click', '.sortByPrice', function() {

  var sorted = $('.product').sort(function(a, b) {
    return (ascending ==
      (convertToNumber($(a).find('.price').html()) <
        convertToNumber($(b).find('.price').html()))) ? 1 : -1;
  });
  ascending = ascending ? false : true;

  $('.results').html(sorted);
});

var convertToNumber = function(value) {
  return parseFloat(value.replace('$', ''));
}

Answer 1

使用 jQuery 的.html() ：

var ascending = false;

$('.tab-content').on('click', '.sortByPrice', function() {

  var sorted = $('.product').sort(function(a, b) {
    return (ascending ==
      (convertToNumber($(a).find('.price').html()) <
        convertToNumber($(b).find('.price').html()))) ? 1 : -1;
  });

  if(ascending){
    ascending = false;
    $(".sortByPrice").html("Sort by Price: descending");
  }else{
    ascending = true;
    $(".sortByPrice").html("Sort by Price: ascending");
  }


  $('.results').html(sorted);
});

var convertToNumber = function(value) {
  return parseFloat(value.replace('$', ''));
}