如何使用Javascript從SVG文件中提取“id”元素？

Question

我正在使用印度 SVG 地圖將其作為用戶界面交互輸入法。 我想要做的是突出顯示懸停狀態。 為此，我出於各種原因使用了 javascript 文件。 以下是我的代碼供您參考，

SVG：

<path
class="enabled"
fill="#2E0854"
 id="IN-WB"
 title="West Bengal"
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CSS：

    html, body {
  width: 100%;
}

svg {
  max-width: 100% !important;
  height: auto;
  display: block;
}

.WB:hover {
    stroke: #B3A123;
    stroke-width: 4;
  -moz-transition: 0.3s;
  -o-transition: 0.3s;
  -webkit-transition: 0.3s;
  transition: 0.3s;
}

.heyo:hover {
  fill: #ffffff;
  -moz-transition: 0.3s;
  -o-transition: 0.3s;
  -webkit-transition: 0.3s;
  transition: 0.3s;
}

.enabled {

  cursor: pointer;
}

.description {
  pointer-events: none;
  position: absolute;
  font-size: 18px;
  text-align: center;
  background: white;
  padding: 10px 15px;
  z-index: 5;
  height: 30px;
  line-height: 30px;
  margin: 0 auto;
  color: #21669e;
  border-radius: 5px;
  box-shadow: 0 0 0 1px #eee;
  -moz-transform: translateX(-50%);
  -ms-transform: translateX(-50%);
  -webkit-transform: translateX(-50%);
  transform: translateX(-50%);
  display: none;
}
.description.active {
  display: block;
}
.description:after {
  content: "";
  position: absolute;
  left: 50%;
  top: 100%;
  width: 0;
  height: 0;
  margin-left: -10px;
  border-left: 10px solid transparent;
  border-right: 10px solid transparent;
  border-top: 10px solid white;
}

JS：

 $description = $(".description");

  $('.enabled').hover(function() {

    var valve = document.getElementById("IN-WB");
    switch(valve)
    {
        case "IN-WB": $(this).attr("class", "enabled heyo");
        break;
        default:$(this).attr("class", "enabled WB");
        break;
    }
    $description.addClass('active');
    $description.html($(this).attr('id'));
  }, function() {
    $description.removeClass('active');
  });

$(document).on('mousemove', function(e){

  $description.css({
    left:  e.pageX,
    top:   e.pageY - 70
  });

});

在 JS 文件中，我試圖獲取 ID，然后在 switch 語句下想要在其他 CSS 函數中混洗。 但是由於某種原因，當嘗試在控制台窗口中發布輸出時，它在 javascript 中顯示未定義的閥門值。

Answer 1

不知道 switch case，但要獲取 ID，您可以簡單地使用 $(this).attr('id');

.hover 功能是否真的有效？ 因為對我來說它永遠不起作用所以我被迫使用 mouseover mouseout