在jquery ui datepicker中，无论如何在OnSelect()事件上都可以获取先前选择的日期 [英] in jquery ui datepicker, on the OnSelect() event is there anyway to get the previous selected date

问题描述

我在 jquery ui datepicker 的 onSelect 事件上具有代码现在我只想在日期已更改值的情况下运行我的函数(因此，如果用户选择文本框中已经存在的日期，则我不想运行此代码，因为这将是多余的计算).这是我现有的代码.

i have code on the onSelect event of the jquery ui datepicker and 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.

$('#Milestone').datepicker({
    dateFormat: 'dd M yy',
    onSelect: calcUpdate
});

推荐答案

您可以使用数据存储以前存储的值，并将当前值与其进行比较.

You can use data to store previously stored value and compare the current value to it.

尝试以下操作(将这些语句放入文档准备事件中):

Try this(put these statements in your document ready event):

$('#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();
            }
        }
});

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