Javascript jQuery:设置下拉列表的选定值?
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jQuery: set selected value of dropdown list?
提问by simon
What's wrong with this code?
这段代码有什么问题?
jQuery
jQuery
$(document).ready(function() {
$("#routetype").val('quietest');
)};
HTML
HTML
<select id="routetype" name="routetype">
<option value="fastest">Fastest</option>
<option selected="true" value="balanced">Balanced</option>
<option value="quietest">Quietest</option>
</select>
It gives me 'Balanced' as the selected option, not 'Quietest'.
它给了我“平衡”作为选择的选项,而不是“最安静”。
采纳答案by mVChr
You need to select jQuery in the dropdown on the left and you have a syntax error because the $(document).ready
should end with });
not )};
Check this link.
您需要在左侧的下拉列表中选择 jQuery 并且您有语法错误,因为$(document).ready
应该以});
not检查此链接结束)};
。
回答by mattsven
UPDATED ANSWER:
更新的答案:
Old answer, correct method nowadays is to use jQuery's .prop()
. IE, element.prop("selected", true)
旧答案,现在正确的方法是使用 jQuery 的.prop()
. IE,element.prop("selected", true)
OLD ANSWER:
旧答案:
Use this instead:
改用这个:
$("#routetype option[value='quietest']").attr("selected", "selected");
Fiddle'd:http://jsfiddle.net/x3UyB/4/
小提琴:http : //jsfiddle.net/x3UyB/4/
回答by Hardik
You can select dropdown option value by name
您可以按名称选择下拉选项值
jQuery("#option_id").find("option:contains('Monday')").each(function()
{
if( jQuery(this).text() == 'Monday' )
{
jQuery(this).attr("selected","selected");
}
});