如何检查是否选择了一个选项? [英] How to check if an option is selected?

问题描述

$('#mySelectBox option').each(function() {
    if ($(this).isChecked())
       alert('this option is selected');
     else
       alert('this is not');
});

显然，isChecked不起作用.所以我的问题是执行此操作的正确方法是什么? 谢谢.

Apparently, the isChecked doesn't work. SO my question is what is the proper way to do this? Thanks.

推荐答案

更新

对所选选项更直接的jQuery方法是:

A more direct jQuery method to the option selected would be:

var selected_option = $('#mySelectBox option:selected');

回答问题.is(':selected')您要寻找的是什么

Answering the question .is(':selected') is what you are looking for:

$('#mySelectBox option').each(function() {
    if($(this).is(':selected')) ...

非jQuery(可以说是最佳实践)的实现方式是:

The non jQuery (arguably best practice) way to do it would be:

$('#mySelectBox option').each(function() {
    if(this.selected) ...

尽管如此，如果您只是在寻找选定的值，请尝试:

Although, if you are just looking for the selected value try:

$('#mySelectBox').val()

如果要查找所选值的文本，请执行以下操作:

If you are looking for the selected value's text do:

$('#mySelectBox option').filter(':selected').text();

签出: http://api.jquery.com/selected-selector/

下次寻找重复的SO问题:

Next time look for duplicate SO questions:

获取当前选定的选项 或者 设置所选选项 或者 如何在jQuery中获得$(this)选择的选项? 或者 选项[selected = true]不起作用

Get current selected option or Set selected option or How to get $(this) selected option in jQuery? or option[selected=true] doesn't work

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