[英]How can maintain as selected the second option in a drop down with random values?
我想始終保持如何為下拉菜單選擇第二個選項。 這里的要點是該值是隨機的:
MyBrowser.document.getElementById("multipleCat_1").Value = "RANDOMVALUE"
如何在下拉菜單中選擇第二個選項?
HTML:
<select id="multipleCat_1">
<option value="-1">Select</option>
<option value="RANDOMVALUE">Second Option"</option>
</select>
您可以使用selectedIndex
,如下所示:
document.querySelectorAll('#multipleCat_1 > option')[1].value = 'Got you!'; document.getElementById('multipleCat_1').selectedIndex = 1 console.log(document.getElementById('multipleCat_1').value)
<select id="multipleCat_1"> <option value="-1">Select</option> <option value="RANDOMVALUE">Second Option"</option> </select>
<select id="multipleCat_1">
<option value="A">AAA</option>
<option value="B">BBB</option>
<option value="C">CCC</option>
</select>
var options = document.querySelectorAll('#multipleCat_1 > option');
document.getElementById('multipleCat_1').value = options[1].value;
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