我正在尝试执行与该提琴非常相似的操作,但是与其禁用与所选组不在同一组中的其他选择,我要禁用与所选组不在同一组中的所有选项...因此强制用户从同一组中选择另一个选项。
但是,即使我只是简单地从小提琴复制代码,也会给我一个错误:
https://jsfiddle.net/bindrid/hpkqxto6/
<select multiple style="width: 300px">
<option groupid="a" value="A_AK">Alaska</option>
<option groupId="b" value="B_HI">Hawaii</option>
<option groupid="c" value="C_CA">California</option>
<option groupid="a" value="D_NV">Nevada</option>
<option groupid="b" value="A_OR">Oregon</option>
<option groupid="c" value="B_WA">Washington</option>
<option groupid="a" value="C_AZ">Arizona</option>
<option groupid="b" value="D_CO">Colorado</option>
<option groupid="c" value="A_ID">Idaho</option>
<option groupid="a" value="B_MT">Montana</option>
<option groupid="b" value="C_NE">Nebraska</option>
<option groupid="c" value="D_NM">New Mexico</option>
<option groupid="a" value="A_ND">North Dakota</option>
<option groupid="b" value="B_UT">Utah</option>
<option groupid="c" value="C_WY">Wyoming</option>
</select>
$(function() {
$('select').select2({
allowClear: true,
placeholder: "Pick a State"
});
//Select2 Event handler for selecting an item
$('select').on("select2:selecting", function(evt, f, g) {
disableSel2Group(evt, this, true);
});
// Select2 Event handler for unselecting an item
$('select').on("select2:unselecting", function(evt) {
disableSel2Group(evt, this, false);
});
});
// At some point during the select2 instantation it created the
// data object it needs with the source select option.
// This function, called by the events above to set the current status for the
// group for which the selected option belongs.
function disableSel2Group(evt, target, disabled) {
// Found a note in the Select2 formums on how to get the item to be selected
var selId = evt.params.args.data.id;
var group = $("option[value='" + selId + "']").attr("groupid");
var aaList = $("option", target);
$.each(aaList, function(idx, item) {
var data = $(item).data("data");
var itemGroupId = $("option[value='" + data.id + "']").attr("groupid");
if (itemGroupId == group && data.id != selId) {
data.disabled = disabled;
}
})
}
这样的想法是,当在select2下拉列表中选择一个选项时,它将禁用其他选项。但是,即使我简单地重新创建此代码,也会收到一条错误(无法读取未定义的属性“ id”),该错误在行上触发:
var group = $("option[value='" + selId + "']").attr("groupid");
任何人都可以帮助解决该错误,然后帮助我禁用所有其他组的主要目的吗?谢谢。
您可以使用evt.params.args.data.element
它为您提供html选项标签,然后使用它可以获取groupid
值并将其与所有选项attr进行比较(如果不是同样禁用了该选项)。
现在,不要unselecting
使用它,unselect
因为在选择框未选择任何值的情况下,您需要在此处启用所有选项。因此,在函数内部select2('data').length
,如果0
仅启用长度,则仅启用所有选项。
演示代码:
$(function() {
$('select').select2({
allowClear: true,
placeholder: "Pick a State"
});
$('select').on("select2:selecting", function(evt, f, g) {
disableSel2Group(evt, this, true);
});
$('select').on("select2:unselect", function(evt) {
disableSel2Group(undefined, undefined, false);
});
})
function disableSel2Group(evt, target, disabled) {
//check if disabled true
if (disabled) {
//get option
var selId = evt.params.args.data.element;
var group = $(selId).attr('groupid') //groupid
var aaList = $("option", target);
$.each(aaList, function(idx, item) {
var other_groups = $(item).attr("groupid"); //get option groupid
var data = $(item).data("select2-id"); //get option selct2id
//if not same
if (group != other_groups) {
$("select option[data-select2-id =" + data + "]").prop("disabled", true); //disable that option
}
})
} else {
var count = $('select').select2('data').length //checcking slected data count
console.log(count)
//if 0
if (count == 0) {
$("select option").prop("disabled", false); //enable all options
}
}
}
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/select2.min.css">
<script src="https://code.jquery.com/jquery-3.5.0.js"></script>
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/select2.min.js"></script>
<select multiple style="width: 300px">
<option groupid="a" value="A_AK">Alaska</option>
<option groupid="b" value="B_HI">Hawaii</option>
<option groupid="c" value="C_CA">California</option>
<option groupid="a" value="D_NV">Nevada</option>
<option groupid="b" value="A_OR">Oregon</option>
<option groupid="c" value="B_WA">Washington</option>
<option groupid="a" value="C_AZ">Arizona</option>
<option groupid="b" value="D_CO">Colorado</option>
<option groupid="c" value="A_ID">Idaho</option>
<option groupid="a" value="B_MT">Montana</option>
<option groupid="b" value="C_NE">Nebraska</option>
<option groupid="c" value="D_NM">New Mexico</option>
<option groupid="a" value="A_ND">North Dakota</option>
<option groupid="b" value="B_UT">Utah</option>
<option groupid="c" value="C_WY">Wyoming</option>
</select>
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