try_dom_option_settext 在线代码实例

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运行代码

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<!DOCTYPE html>
<html>
<head>
<script>
function changeText()
{
var x=document.getElementById("mySelect");
x.options[x.selectedIndex].text="Melon";
}
</script>
</head>
<body>
<form>
Select your favorite fruit:
<select id="mySelect">
  <option>Apple</option>
  <option>Orange</option>
  <option>Pineapple</option>
  <option>Banana</option>
</select>
<br><br>
<input type="button" onclick="changeText()" value="Set text of selected option">
</form>
</body>
</html>
 
 
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运行结果
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