Javascript

Question

如何使 plus/minus 标志可点击？现在不是... 如果在单击第二个按钮时打开，如何关闭另一个按钮（下拉菜单）？

$(".dropbtn").append('<span class="adl-signs">&nbsp;+</span>');

function ctaDropMenu(e) {
  e.target.nextElementSibling.classList.toggle("show");
}

function toggleSigns(e) {
  $(e.target).find('.adl-signs').html(function(_, html) {
    return $.trim(html) == '&nbsp;+' ? '&nbsp;-' : '&nbsp;+';
  });
}

$(".dropbtn").click( function(e) {
  ctaDropMenu(e)
  toggleSigns(e)
});

// Close the dropdown if the user clicks outside of it
window.onclick = function(event) {
  if (!event.target.matches('.dropbtn')) {

    var dropdowns = document.getElementsByClassName("dropdown-content");
    var i;
    for (i = 0; i < dropdowns.length; i++) {
      var openDropdown = dropdowns[i];
      if (openDropdown.classList.contains('show')) {
        openDropdown.classList.remove('show');
      }
    }
  }
}

FIDDLE = https://jsfiddle.net/neuhaus3000/jf1zetLw/8/

Answer 1

这是更新后的 fiddle。我试图尽可能地简化您的代码，并尽可能使用 jQuery。

function changeText(text) {
  return (text.indexOf('+') >= 0) ? 'Click Me -' : 'Click Me +';
}

$(".dropbtn").click(function() {

  var $this = $(this),
    $dropdownActive = $('.dropdown-active');

  /* changing the text of the active button (if any) */
  $dropdownActive.text(changeText($dropdownActive.text()));

  /* hiding the content under the active button (if any) */
  $('.dropdown-content', $dropdownActive.parent()).toggle('show');

  if (!$this.hasClass('dropdown-active')) {

    /* changing the text of the clicked button */
    $this.text(changeText($this.text()));

    /* showing the content under the clicked button */
    $('.dropdown-content', $this.parent()).toggle('show');

    /* adding this class to the clicked button */
    $this.addClass('dropdown-active');
  }

  /* removing this class from the active button */
  $dropdownActive.removeClass('dropdown-active');
});

// Close the dropdown if the user clicks outside of it
window.onclick = function(event) {
  if (!event.target.matches('.dropbtn')) {

    var $dropdownActive = $('.dropdown-active');

    /* changing the text of the active button (if any) */
    $dropdownActive.text(changeText($dropdownActive.text()));

    /* hiding the content under the active button (if any) */
    $('.dropdown-content', $dropdownActive.parent()).toggle('show');

    /* removing this class from the active button */
    $dropdownActive.removeClass('dropdown-active');
  }
}

如果您有任何问题，请告诉我。谢谢

Javascript - 使元素可点击并关闭其他按钮

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