moment.js

JavaScript

$('#arriving-time').on("change", function() { var $this = $(this); if($this.val() != ''){ var after_3_months = moment().add(3, 'months'); var selected = moment($this.val()); if(selected.isAfter(after_3_months) == true){ alert('抱歉，出國日期不可晚於3個月'); $this.val(''); } } });

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$('#arriving-time').on("change", function() { var $this = $(this);   if($this.val() != ''){ var after_3_months = moment().add(3, 'months'); var selected = moment($this.val()); if(selected.isAfter(after_3_months) == true){ alert('抱歉，出國日期不可晚於3個月'); $this.val(''); } } });