我会设置一个缓存来保存options
我的select
. 而不是在 中过滤options
,select
我会清除select
,然后用 match 重新填充它options
。
大量伪代码:
onLoad:
set cache
onKeyPress:
clear select-element
find option-elements in cache
put found option-elements into select-element
这是我写的一个小 POC,selects
从另一个中选择的内容中进行过滤select
——实际上是将一堆选择链接在一起。
也许它可以给你一些想法:
function selectFilter(_maps)
{
var map = {};
var i = _maps.length + 1; while (i -= 1)
{
map = _maps[i - 1];
(function (_selectOne, _selectTwo, _property)
{
var select = document.getElementById(_selectTwo);
var options = select.options;
var option = {};
var cache = [];
var output = [];
var i = options.length + 1; while (i -= 1)
{
option = options[i - 1];
cache.push({
text: option.text,
value: option.value,
property: option.getAttribute(_property)
});
}
document.getElementById(_selectOne).onchange = function ()
{
var selectedProperty = this
.options[this.selectedIndex]
.getAttribute(_property);
var cacheEntry = {};
var cacheEntryProperty = undefined;
output = [];
var i = cache.length + 1; while (i -= 1)
{
cacheEntry = cache[i - 1];
cacheEntryProperty = cacheEntry.property;
if (cacheEntryProperty === selectedProperty)
{
output.push("<option value=" + cacheEntry.value + " "
_property + "=" + cacheEntryProperty + ">" +
cacheEntry.text + "</option>");
}
}
select.innerHTML = output.join();
};
}(map.selectOne, map.selectTwo, map.property));
}
}
$(function ()
{
selectFilter([
{selectOne: "select1", selectTwo: "select2", property: "entityid"},
{selectOne: "select2", selectTwo: "select3", property: "value"}
]);
});