我正在为jQuery日期选择器使用knockout绑定。
请参阅jQuery UI datepicker change event not caught by KnockoutJS
相同的代码工作正常,但我无法动态设置datepicker选项。
如何使用上面的参考链接动态设置datepicker选项(如同最大限度日期等)?
答案 0 :(得分:6)
首先,您需要将options
对象作为视图模型的一部分。然后,在更改后,使用新的datePicker
更新options
。
这样,您可以将options(如dayNames
和dateFormat
等)添加到options
对象中,绑定处理程序将自动更新组件
例如(动态更改minDate
):
var viewModel = {
myDate: ko.observable(new Date("12/01/2013")),
setToCurrentDate: function() {
this.myDate(new Date());
},
options: {
// make sure you're using an observable to wrap the value
minDate: ko.observable(new Date())
},
changeMinDate: function(){
this.options.minDate(new Date('01/01/2015'));
}
};
在绑定处理程序中(添加对options
上的更改的订阅):
ko.bindingHandlers.datepicker = {
init: function(element, valueAccessor, allBindingsAccessor) {
var $el = $(element);
var opts = allBindingsAccessor().datepickerOptions;
//initialize datepicker with some optional options
var options = ko.mapping.toJS(opts) || {};
$el.datepicker(options);
//handle the field changing
ko.utils.registerEventHandler(element, "change", function() {
var observable = valueAccessor();
observable($el.datepicker("getDate"));
});
//handle disposal (if KO removes by the template binding)
ko.utils.domNodeDisposal.addDisposeCallback(element, function() {
$el.datepicker("destroy");
});
// subscribe to all changes in the options object
ko.computed(function(){
var options = ko.mapping.toJS(opts) || {};
for (var i in options)
$el.datepicker('option', i, options[i]);
});
},
update: function(element, valueAccessor) {
var value = ko.utils.unwrapObservable(valueAccessor()),
$el = $(element),
current = $el.datepicker("getDate");
if (value - current !== 0) {
$el.datepicker("setDate", value);
}
}
};
请参阅Fiddle