在 jquery ui datepicker 中，在 OnSelect() 事件上无论如何都可以获取上一个选定的日期
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in jquery ui datepicker, on the OnSelect() event is there anyway to get the previous selected date
提问by leora
i have code on the onSelectevent of the jquery ui datepickerand i now want to only run my function if the date has changed values (so if a user selects a date that was already there in the textbox, i don't want to run this code as it will be a redundant calculation). Here is my existing code.
我在jquery ui datepicker的onSelect事件上有代码，现在我只想在日期更改值时运行我的函数（因此，如果用户选择文本框中已经存在的日期，我不想运行这段代码，因为这将是一个冗余计算）。这是我现有的代码。
$('#Milestone').datepicker({
dateFormat: 'dd M yy',
onSelect: calcUpdate
});
回答by Reza Mamun
According to http://api.jqueryui.com/datepicker/#option-onSelect, you should try this:
根据http://api.jqueryui.com/datepicker/#option-onSelect，你应该试试这个：
$('#Milestone').datepicker({
dateFormat: 'dd M yy',
onSelect: function(curDate, instance){
if( curDate != instance.lastVal ){
//so, the date is changed;
//Do your works here...
}
}
});
The onSelect function receives 2 parameters which are used here; You can debug/console the values of the 2nd parameter to know more about it.
onSelect 函数接收这里使用的 2 个参数；您可以调试/控制台第二个参数的值以了解更多信息。
回答by Chandu
You can use data to store previously stored value and compare the current value to it.
您可以使用数据来存储先前存储的值并将当前值与其进行比较。
Try this(put these statements in your document ready event):
试试这个（把这些语句放在你的文档就绪事件中）：
$('#Milestone').data("prev", $(this).val());
$('#Milestone').datepicker({
dateFormat: 'dd M yy',
onSelect: function(dateText){
var prevDate = $(this).data("prev")
var curDate = dateText;
if(prevDate == curDate){
$(this).data("prev", curDate)
calcUpdate();
}
}
});
