JavaScript 获取当前日期在本月中的周数

var date = new Date(); var year = date.getFullYear(); var month = date.getMonth() + 1; var day = date.getDate();

// 获取本月第一天 var firstDay = new Date(year, month - 1, 1); // 获取本周第一天 var firstWeekDay = new Date(date.getTime() - (date.getDay() - 1) * 86400000);

var weeks = Math.ceil((day + firstDay.getDay()) / 7);

console.log('本月第' + weeks + '周');