javascript 如何使用 Jquery 更改选项值?
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How to change option value with Jquery?
提问by karim79
I am looking for a way to change the option value from a select tag when users click on a link.
我正在寻找一种方法来在用户单击链接时从选择标记更改选项值。
For example I have a select option html:
例如,我有一个选择选项 html:
<select> <option value="0">Please Select</option>
<option value="1">red</option>
<option value="2">white</option>
</select>
And I have 2 links <a href="#" title="red" class="preview_link">red</a> <a href="#" title="white">white</a>When user clicks red the option will switch to red and white will switch to white. I am using the following code but it is not working.
我有 2 个链接<a href="#" title="red" class="preview_link">red</a> <a href="#" title="white">white</a>当用户单击红色时,该选项将切换为红色,白色将切换为白色。我正在使用以下代码,但它不起作用。
jQuery("a.preview_link").click(function() {
var title = jQuery(this).attr("title");
jQuery(this).parent('p').children("select :selected").text(title);
});
Any suggestions?
有什么建议?
回答by karim79
Your way will set the option's text to the title attribute. Try:
您的方式将选项的文本设置为标题属性。尝试:
jQuery("a.preview_link").click(function() {
var title = jQuery(this).attr("title");
jQuery(this).parent('p').find("select option").filter(function() {
return $(this).text() == title;
}).attr('selected', 'selected');
});
See filter.
见filter。
回答by Brad Heller
Hmm, you're going about this wrong: Instead of changing the text of the selected option you need to loop over the <option/>elements and select the appropriate one, something like this:
嗯,你这样做是错误的:你需要循环<option/>元素并选择适当的元素,而不是更改所选选项的文本,如下所示:
$("select option").each(function() {
if($(this).text() == "red")) {
this.selected = true;
}
});
Edit: There might be a select()function in jQuery. If that's the case then use that over the DOM property.
编辑:select()jQuery 中可能有一个函数。如果是这种情况,那么在 DOM 属性上使用它。
回答by TJ Koblentz
This?
这?
$("select #some-option").attr("selected", "selected");
Or this?
或这个?
$("select").val(index);

