javascript - 从被点击的元素image src中放入image src并更新数据

Question

我不知道如何解释这个，因为我是一个业余爱好者。

我有一个包含 6 种语言的语言菜单:Es, Br, Fr, It, De, En

所以，我选择了默认语言 EN 和一个包含其余图像的下拉菜单。

问题是:当我点击它时如何更新文本和图像(例如)。

我的结构是这样的:

$(".dropbtn, .burger").click(function() {
  $(this).next(".dropdown-content, .items").stop().slideToggle(500);
  //$(this).find(".arrow-up, .arrow-down").toggle();
});

// If you click outside dropdown - close dropdown
var $menu = $('.dropdown');
$(document).mouseup(function(e) {
  if (!$menu.is(e.target) && $menu.has(e.target).length === 0) {
    $('.dropdown-content').hide();
  }
});

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<a href="javascript:void(0)" class="dropbtn">
  <img src="assets/img/languages/flag_en.png" alt=""> EN
  <span class="ico ico-pointer_down"></span>
</a>
<div class="dropdown-content" id="dd-content">
  <a href="#"><img src="assets/img/languages/flag_br.png" alt=""> PT</a>
  <a href="#"><img src="assets/img/languages/flag_es.png" alt=""> ES</a>
  <a href="#"><img src="assets/img/languages/flag_fr.png" alt=""> FR</a>
  <a href="#"><img src="assets/img/languages/flag_de.png" alt=""> DE</a>
  <a href="#"><img src="assets/img/languages/flag_it.png" alt=""> IT</a>
</div>

Answer 1

您可以将文本包装在 span 中，例如:

<span class="lang">EN</span>

并附加点击事件，然后在点击时将文本和图像复制到 .dropbtn 并使用 hide 类隐藏点击的 anchor ，最后删除类 hide 来自所有其他 anchor ，例如:

$(".dropbtn").click(function() {
  $(this).next(".dropdown-content, .items").stop().slideToggle(500);
});

// If you click outside dropdown - close dropdown
var $menu = $('.dropdown');
$(document).mouseup(function(e) {
  if (!$menu.is(e.target) && $menu.has(e.target).length === 0) {
    $('.dropdown-content').hide();
  }
});

$("#dd-content a").click(function() {
  var text = $(this).text();
  var img = $(this).find('img').clone(true);

  $('.dropbtn .lang').text(text);
  $('.dropbtn img').replaceWith(img);

  $("#dd-content a").removeClass('hide');
  $(this).addClass('hide');
});

a.hide {
  display: none;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

<a href="javascript:void(0)" class="dropbtn">
  <img src="assets/img/languages/flag_en.png" alt=""><span class="lang">EN</span>
  <span class="ico ico-pointer_down"></span>
</a>

<div class="dropdown-content" id="dd-content">
  <a href="#" class="hide"><img src="assets/img/languages/flag_en.png" alt=""> EN</a>
  <a href="#"><img src="assets/img/languages/flag_br.png" alt=""> PT</a>
  <a href="#"><img src="assets/img/languages/flag_es.png" alt=""> ES</a>
  <a href="#"><img src="assets/img/languages/flag_fr.png" alt=""> FR</a>
  <a href="#"><img src="assets/img/languages/flag_de.png" alt=""> DE</a>
  <a href="#"><img src="assets/img/languages/flag_it.png" alt=""> IT</a>
</div>