在选择中的更改事件与淘汰赛 [英] on Change event in select with knockout
问题描述
我有一个问题如何调用onchanges敲js到我的选择选项,我已经有一个函数和html,但是当我选择select选项时,没有任何改变
I have a problem how to call onchanges knock js to my select option, i already have a function and html, but when i choose the select option, nothing changes
<select data-bind="event:{change:setSelectedStation() },
options: seedData,
optionsText: 'text',
optionsValue: 'value'">
</select>
这是我的功能
setSelectedStation: function(element, KioskId){
this.getPopUp().closeModal();
$('.selected-station').html(element);
$('[name="popstation_detail"]').val(element);
$('[name="popstation_address"]').val(KioskId);
$('[name="popstation_text"]').val(element);
// console.log($('[name="popstation_text"]').val());
this.isSelectedStationVisible(true);
},
推荐答案
使用knockout的双向数据绑定而不是手动订阅UI事件。
Use knockout's two-way data-binds instead of manually subscribing to UI events.
Knockout的值
data-bind监听UI更改并自动跟踪最新的价值。
Knockout's value
data-bind listens to UI changes and automatically keeps track of the latest value for you.
您可以使用 text
,而不是通过jQuery方法替换HTML。 code> attr 和其他值
绑定,以便在您的选择发生变化时更新UI。
Instead of replacing HTML via jQuery methods, you use text
, attr
and other value
bindings to update the UI whenever your selection changes.
如果您想在选择更改时执行其他工作(例如关闭弹出窗口),则订阅
到所选值。
If you want to perform additional work when a selection changes (e.g. closing a pop up), you subscribe
to the selected value.
var VM = function() {
this.seedData = [
{
text: "Item 1",
data: "Some other stuff"
},
{
text: "Item 2",
data: "Something else"
},
{
text: "Item 3",
data: "Another thing"
}
];
this.selectedItem = ko.observable();
this.selectedItem.subscribe(function(latest) {
console.log("Input changed");
}, this);
};
ko.applyBindings(new VM());
<script src="https://cdnjs.cloudflare.com/ajax/libs/knockout/3.4.2/knockout-min.js"></script>
<select data-bind="
value: selectedItem,
options: seedData,
optionsText: 'text'">
</select>
<!-- ko with: selectedItem -->
<p>
Your selection: <span data-bind="text: data"></span>
</p>
<!-- /ko -->
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