我嘗試了以下 JavaScript/jQuery 代碼來更改邊框粗細。但這是行不通的。請幫我。//$("span").css({"border":"4px solid green"});document.getElementById("192.168.42.151:8984_solr").getElementsByClassName("trees_shard1_replica_n1").find("span").style.borderWidth = "thick";.card {  position: relative;  display: inline-block;  margin: 10px;}.card a {  padding-right: 8px;}.card a span {  border-radius: 1.25rem;  border: 1px solid green;}.card a .replicaActive {  color: transparent;  background-color: transparent;}.card a .replicaLeader {  background-color: #000;}<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script><div class="card">  <div class="card-body" id="192.168.42.151:8984_solr">    <a href="#" class="trees_shard1_replica_n1">      <span class="badge replicaActive">0</span>    </a>  </div></div><div class="card">  <div class="card-body" id="192.168.1.4:8983_solr">    <a href="#" class="trees_shard1_replica_n3">      <span class="badge replicaLeader">0</span>    </a>  </div></div>鏡像：https : //jsfiddle.net/amitkushwaha1710/asdxfc94/44/