某所より要望があったので作りました。 ソースと使い方 ソースです。jQueryは別途用意してください。 $(document).ready(function() { $(".view_timer").each(function(index, target) { var startDate = $(this).attr("data-start-date"); var endDate = $(this).attr("data-end-date"); var nowDate = new Date(); if (startDate) { startDate = new Date(startDate); } else { startDate = nowDate; } if (endDate) { endDate = new Date(endDate); } if (startDate <= nowD
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