js生成一周内的日期+周几

（如有错敬请指点，以下是我工作中遇到并且解决的问题）

旧标题：js生成当前日期起，一周内的日期+周几/今日

效果有两种：

两者区别是

1.第一天（今天）显示今日

2.第一天（今天）显示周几

代码中改变showToday的值即可

可以通过 https://littlehiuman.github.io/04-WeeklyCalendar/ 查看效果。

https://github.com/littleHiuman/littleHiuman.github.io 求点star~~~

CSS：

table {
  border-collapse: collapse;
}
table td {
  height: 30px;
}
#today {
  color: skyblue;
}

HTML：

<table border="1">
  <tr>
    <td id="today"></td>
    <td id="tomorror"></td>
    <td id="thirdday"></td>
    <td id="fourthday"></td>
    <td id="fifthday"></td>
    <td id="sixthday"></td>
    <td id="seventhday"></td>
  </tr>
  <tr>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
    <td></td>
  </tr>
</table>

JavaScript：

var showToday = false // 今天显示“周几”还是显示“今日”

document.getElementById('today').innerText = GetDateStr(0)
document.getElementById('tomorror').innerText = GetDateStr(1)
document.getElementById('thirdday').innerText = GetDateStr(2)
document.getElementById('fourthday').innerText = GetDateStr(3)
document.getElementById('fifthday').innerText = GetDateStr(4)
document.getElementById('sixthday').innerText = GetDateStr(5)
document.getElementById('seventhday').innerText = GetDateStr(6)

function GetDateStr(Count) {
  var dd = new Date()
  dd.setDate(dd.getDate() + Count) //获取Count天后的日期
  var m = dd.getMonth() + 1 //获取当前月份
  m = m < 10 ? '0' + m : m
  var d = dd.getDate() //获取当前月份的日期
  d = d < 10 ? '0' + d : d
  var w = dd.getDay() //获取星期几
  var week
  switch (w) {
    case 0:
      week = '周日'
      break
    case 1:
      week = '周一'
      break
    case 2:
      week = '周二'
      break
    case 3:
      week = '周三'
      break
    case 4:
      week = '周四'
      break
    case 5:
      week = '周五'
      break
    case 6:
      week = '周六'
      break
  }
  if (showToday && Count === 0) {
    week = '今日'
  }
  return m + '/' + d + week
}