JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>菜鸟教程(runoob.com)</title>
</head>
<body>

<p>替换 "Microsoft" 为 "Runoob" :</p>
<button onclick="">点我</button>
<p id="demo">请访问 Microsoft!</p>
	
	<div class="svipgd">111

</div>
	<select id="wpas_ticket_priority" class="wpas-form-control" name="wpas_ticket_priority" required=""><option value="">请选择</option>
	<option value="4323">一般用户</option>

	
	<option value="4325">付费加急</option>

	
	<option value="4324">天宫用户</option>

	</select>


</body>
</html>

JavaScript

var op = document.getElementById("wpas_ticket_priority");
for (var i = 0; i < op.length; i++) {
  if (op[i].value.toLowerCase(1) == "4324") {
    op[i].disabled = true;}}