javascript - Show more/Show less 在刷新时停留在页面上

Question

因此，在实现上一个问题的 jQuery 代码后，我注意到以下内容，每当人们添加位于显示较少/显示更多菜单中的产品时，系统会刷新页面，因为它会重新计算价格，因此也会刷新页面。但是当发生这种情况时，菜单会关闭，然后他们需要再次单击“显示更多”按钮。如何解决？

//this will execute on page load(to be more specific when document ready event occurs)
if ($('.ty-compact-list').length > 3) {
  $('.ty-compact-list:gt(2)').hide();
  $('.show-more').show();
}

$('.show-more').on('click', function() {
  //toggle elements with class .ty-compact-list that their index is bigger than 2
  $('.ty-compact-list:gt(2)').toggle();
  //change text of show more element just for demonstration purposes to this demo
  $(this).text() === 'Show more' ? $(this).text('Show less') : $(this).text('Show more');
});

.ty-compact-list {
  padding: 5px 5px 5px 0px;
  float: left;
  width: 100%;
}
.show-more {
  display: none;
  cursor: pointer;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="wrapper">
  <div class="ty-compact-list">Product 1</div>
  <div class="ty-compact-list">Product 2</div>
  <div class="ty-compact-list">Product 3</div>
  <div class="ty-compact-list">Product 4</div>
  <div class="ty-compact-list">Product 5</div>
  <div class="ty-compact-list">Product 6</div>
  <div class="show-more">Show more</div>
</div>

提前致谢!

Answer 1

正如 Mohit 所说，您可以使用 localStorage，您的代码将如下所示:

var isCompactListOpen = localStorage.getItem('isCompactListOpen') || false;

function setButtonText() {
  if (isCompactListOpen) {
    $(this).text('Show less');
  } else {
    $(this).text('Show more');
  }
}

if ($('.ty-compact-list').length > 3) {
  setButtonText();
  $('.show-more').show();
  if (!isCompactListOpen) {
    $('.ty-compact-list:gt(2)').hide();
  }
}

$('.show-more').on('click', function() {
  //toggle elements with class .ty-compact-list that their index is     bigger than 2
  $('.ty-compact-list:gt(2)').toggle();
  //change text of show more element just for demonstration purposes to this demo
  isCompactListOpen = !isCompactListOpen;
  localStorage.setItem('isCompactListOpen', isCompactListOpen);
  setButtonText();
});