jQuery 根据选择的另一个 SELECT 删除 SELECT 选项(需要支持所有浏览器) [英] jQuery remove SELECT options based on another SELECT selected (Need support for all browsers)
问题描述
假设我有这个下拉菜单:
Say I have this dropdown:
<select id="theOptions1">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>
我想要这样,当用户选择 1 时,这是用户可以为下拉列表 2 选择的内容:
I want it so that when the user selects 1, this is the thing that the user can choose for dropdown 2:
<select id="theOptions2">
<option value="a">a</option>
<option value="b">b</option>
<option value="c">c</option>
</select>
或者如果用户选择 2:
Or if the user selects 2:
<select id="theOptions2">
<option value="a">a</option>
<option value="b">b</option>
</select>
或者如果用户选择 3:
Or if the user selects 3:
<select id="theOptions2">
<option value="b">b</option>
<option value="c">c</option>
</select>
我尝试了这里发布的代码:jQuery 禁用 SELECT 选项基于已选择收音机(需要所有浏览器的支持)
I tried the code posted here: jQuery disable SELECT options based on Radio selected (Need support for all browsers)
但它不适用于选择.
请帮忙!谢谢!
更新:我真的很喜欢 Paolo Bergantino 的回答:jQuery 禁用 SELECT 选项基于已选择收音机(需要所有浏览器的支持)
UPDATE: I really like the answer Paolo Bergantino had on: jQuery disable SELECT options based on Radio selected (Need support for all browsers)
无论如何要修改它以使用选择而不是单选按钮?
Is there anyway to modify this to work with selects instead of radio buttons?
jQuery.fn.filterOn = function(radio, values) {
return this.each(function() {
var select = this;
var options = [];
$(select).find('option').each(function() {
options.push({value: $(this).val(), text: $(this).text()});
});
$(select).data('options', options);
$(radio).click(function() {
var options = $(select).empty().data('options');
var haystack = values[$(this).attr('id')];
$.each(options, function(i) {
var option = options[i];
if($.inArray(option.value, haystack) !== -1) {
$(select).append(
$('<option>').text(option.text).val(option.value)
);
}
});
});
});
};
推荐答案
这有效(在 Safari 4.0.1、FF 3.0.13 中测试):
This works (tested in Safari 4.0.1, FF 3.0.13):
$(document).ready(function() {
//copy the second select, so we can easily reset it
var selectClone = $('#theOptions2').clone();
$('#theOptions1').change(function() {
var val = parseInt($(this).val());
//reset the second select on each change
$('#theOptions2').html(selectClone.html())
switch(val) {
//if 2 is selected remove C
case 2 : $('#theOptions2').find('option:contains(c)').remove();break;
//if 3 is selected remove A
case 3 : $('#theOptions2').find('option:contains(a)').remove();break;
}
});
});
还有漂亮的用户界面:
<select id="theOptions1">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
</select>
<br />
<select id="theOptions2">
<option value="a">a</option>
<option value="b">b</option>
<option value="c">c</option>
</select>
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