jQuery Datepicker - 获取悬停日期 [英] jQuery Datepicker - Get date on hover

问题描述

我正在使用这个 jQuery datepicker，我试图获得悬停日期。我看到插件有一个参数：

I'm using this jQuery datepicker and I'm trying to get the value of the date on hover. I see the plugin has a parameter:

eventName
触发日期选择器。默认值：'click'

由于文档非常有限，我想知道点击之外是否还有其他选项，如果没有，我可以使用 eventName 获取悬停值。

Since the documentation is very limited, I wonder if there're are other options besides click and if not, how can I use eventName to get the value on hover.

推荐答案

eventName 选项仅用于将内部 show 方法绑定到事件：

The eventName option is only used to bind the internal show method to an event:

$(this).bind(options.eventName, show);

理论上可以使用 hover 显示datepicker，但您必须为 eventName 选项指定'mouseenter mouseleave'为 hover 是一个jQuery快捷方式绑定到'mouseenter mouseleave '。

You could, in theory, use hover to show the datepicker but you'd have to specify 'mouseenter mouseleave' for the eventName option as hover is a jQuery shortcut method to bind to 'mouseenter mouseleave'.

由于您已经在（在评论中）声明您希望在 kayak.co.in ，你可以通过在之后链接一个 mouseenter 处理程序， .DatePicker 调用（不需要任何其他更改）：

Since you've stated (in comments) that you want the behavior found at kayak.co.in, you can mimic this merely by chaining a mouseenter handler after the .DatePicker call (no change needed to anything else):

$('#date').DatePicker({
    // options...
}).on('mouseenter', '.datepickerDays td:not(.datepickerDisabled, .datepickerNotInMonth)', function (e) { // delegating on the mouseenter event which jQuery patches to be a cross-browser event, and only targeting clickable dates
    var target = $(this).children('a'), // cache lookup
        options = target.parents('.datepicker').data('datepicker'), // get DatePicker options
        current = new Date(options.current), // grab the current month/year
        val = parseInt(target.text(), 10), // grab the target date
        hoverVal = new Date(current.getFullYear(), current.getMonth(), val), // make into an actual date
        hoverDay = hoverVal.getDayName(), // get the short day name
        hoverM = hoverVal.getMonth() + 1, // and month
        hoverD = hoverVal.getDate(), // and date
        hoverText = hoverDay + ' ' + (hoverD < 10 ? '0' + hoverD : hoverD) + '/' + hoverM, // for a formatted text value
        selectedVal = new Date(options.date[0]), // get the selected date (which may just be the initial date without an actual selection or an actual selected date, hereafter "selected")
        selectedDay = selectedVal.getDayName(), // get the short day name
        selectedM = selectedVal.getMonth() + 1, // and month
        selectedD = selectedVal.getDate(), // and date
        selText = selectedDay + ' ' + (selectedD < 10 ? '0' + selectedD : selectedD) + '/' + selectedM, // for a formatted text value
        startDate = $('#startDate').data('lastHovered') || new Date(hoverVal) || selectedVal, // default to: last hovered, current hover, or "selected" date (in that order)
        endDate = $('#endDate').data('lastHovered') || new Date(options.date[1]) || startDate, // default to: last hovered, actual selected date, or "selected" date (in that order)
        startDateSelected = $('#startDate').data('startDateSelected') || $('.datepickerDays .datepickerSelected.first').length > 0, // test whether an actual date was selected
        endDateSelected = !isNaN(options.date[1]) && (options.date[1] - options.date[0] > 86400000), // test whether an end date was selected. end date is set in options when start date is actually selected and is the same day as the selected start date but the time is set to 23:59:59
        selector; // variable to store a selector string
    // no end date has been selectd AND if no start date has been selected, or if it has and the user is hovering over an earlier date, or if the user hasn't selected a date yet
    if (!endDateSelected && (!startDateSelected || (startDateSelected && hoverVal < selectedVal) || hoverVal <= startDate)) {
        selector = '#startDate'; // use the startDate input
        $('#endDate').val(''); // since using startDate, endDate has not been selected. make sure the input is cleared.
    } else if (!endDateSelected){ // otherwise, as long as no end date has been selected
        selector = '#endDate'; // use the endDate input
        $('#startDate').val(selText); // and set the value of startDate back to the actual selected date value
    }
    if (!endDateSelected) { // if the user hasn't picked an end date (which cannot be picked without a start date)
        $(selector).data({ // persist the last hovered date and whether a start date has been selected
            "lastHovered": hoverVal,
            "startDateSelected": startDateSelected // this is necessary as the plugin routinely destroys and recreates the tables that make up the calendars while navigating the calendars
        }).val(hoverText); // set the value of the input to the hovered date
    }
});

这篇关于jQuery Datepicker - 获取悬停日期的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！