javascript 如何使用ajax更新select2下拉列表中的数据
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how to update data in select2 dropdown using ajax
提问by Herald Charley
I have a select2 dropdown for location.select2 data is initialised on page load.I want to update the data at regular intervals using ajax.But when I update the data of select2 the select2 dropdown becomes read only
我有一个用于 location.select2 数据的 select2 下拉列表在页面加载时初始化。我想使用 ajax 定期更新数据。但是当我更新 select2 的数据时，select2 下拉列表变为只读
jQuery("#e10_2").select2({
allowClear: true,
minimumInputLength: 1,
data:{ results: locationls, text: function(item) { return item.text; }},
formatSelection: format,
formatResult: format
});
回答by Wallter
I don't really understand your question and think it needs some clarifying - but as far as I could understand (I ran into this problem and found your question when Googleing it...)
我不太明白你的问题，并认为它需要一些澄清 - 但据我所知（我遇到了这个问题并在谷歌搜索时发现了你的问题......）
When I first load the page I run the following JavaScript so that all of my drop-down select boxes are styled and using select2:
当我第一次加载页面时，我运行以下 JavaScript，以便我的所有下拉选择框都设置样式并使用 select2：
$('select').select2();
But as your title states, my code below works by updating the drop-down to a new set of data -where my /store/ajax_get_zonesfunction returns HTML for the options:
但正如您的标题所述，我下面的代码通过将下拉列表更新为一组新数据来工作 - 其中我的/store/ajax_get_zones函数为选项返回 HTML：
$(function() {
$('#country').on('change', function() {
$.post("/store/ajax_get_zones", {
country_id: $('#country').val()
}, function(e) {
if (e)
$("#state").html(e).select2();
})
});
});
All you have to do is call .select2()on the element after you update the data.
您所要做的就是.select2()在更新数据后调用该元素。
Screen Shots
屏幕截图
Start with the default United States:
从默认的美国开始：
Then when you change the country the state drop-down changes as well (ajax updated the inner HTML of the original select while still themed to select2
然后，当您更改国家/地区时，状态下拉列表也会更改（ajax 更新了原始选择的内部 HTML，同时仍以 select2 为主题
