SOURCE

//[{monthName: '2021/12',{monthDays: [{ifDisabled: true,day: 1,optionName: '预约'}]}},{monthName: '2022/1'}]

let curDay = new Date().getDate()
let month = new Date().getMonth() + 1
let year = new Date().getFullYear()
let month1 
let year1
if(month + 1 == 13){
    year1 = year +1
    month1 = 1
}else{
    year1 = year
    month1 = month + 1
}
let lastList = [{month: month,year: year},{month:month1,year: year1}]
lastList = lastList.map((item,index)=>{
    let days = new Date(item.year,item.month,0).getDate()
    let itemDayArr = [...Array(days)].map((k,i)=>i+1)
    let curFirstDay = `${item.year}/${item.month}/${itemDayArr[0]}`
    let curFiestDayWeek = new Date(curFirstDay).getDay()
    let preloadArr = Array(curFiestDayWeek).fill('')
    let curLastDay = `${item.year}/${item.month}/${itemDayArr[itemDayArr.length - 1]}`
    let curLastDayWeek = 6 - new Date(curLastDay).getDay()
    let lastArr =Array(curLastDayWeek).fill('')
    itemDayArr = [...preloadArr,...itemDayArr,...lastArr]
    item.myDayList = itemDayArr.map((ele,eleIndex)=>{
        if(ele == ''){
            ele = {
                ifDisabled: true,
                day: ele,
                optionName: '不可预约'
            }
        }else{
            let eleDay = `${item.year}/${item.month}/${ele}`
            let eleWeek = new Date(eleDay).getDay()
            if(index == 0){
                if(ele <= curDay){
                    ele = {
                        ifDisabled: true,
                        day: ele,
                        optionName: '不可预约'
                    }
                } else if(eleWeek == 0 || eleWeek == 6){
                    ele = {
                        ifDisabled: true,
                        day: ele,
                        optionName: '不可预约'
                    }
                } else {
                    ele = {
                        ifDisabled: false,
                        day: ele,
                        optionName: '预约'
                    }
                }
            }else {
                if(eleWeek == 0 || eleWeek == 6){
                    ele = {
                        ifDisabled: true,
                        day: ele,
                        optionName: '不可预约'
                    }
                } else {
                    ele = {
                        ifDisabled: false,
                        day: ele,
                        optionName: '预约'
                    }
                }
            }   
        }
        return ele
    }) 
    return item
})
console.log(lastList)

//获取当天
// let curDay = new Date().getDate()
//获取当月
// let month = new Date().getMonth() + 1
//获取当年
// let year = new Date().getFullYear()
// //获取该月份下共有多少天
// let days = new Date(year, month, 0).getDate()
// //天数组成数组
// let arr = [...Array(days)].map((k, i) => i + 1)
// //获取第一天日期
// let curFirstDay = `${year}/${month}/${arr[0]}`
// //获取第一天周几
// let curFirstDayWeek = new Date(curFirstDay).getDay()
// //获取天数首部需要拼接的数据
// let preloadArr = new Array(curFirstDayWeek).fill('')
// //获取最后一天日期
// let curLastDay = `${year}/${month}/${arr[arr.length-1]}`
// //获取最后一天周几
// let curLastDayWeek = 6 - new Date(curLastDay).getDay()
// //获取最后需要拼接的数据
// let lastArr = new Array(curLastDayWeek).fill('')
// arr = [...preloadArr,...arr,...lastArr]
// arr = arr.map(item=>{
//     if(item == ''){
//         item = {
//             ifDisabled: true,
//             day: item,
//             optionName: '不可预约'
//         }
//     }else{
//         let itemDay = `${year}/${month}/${item}`
//         let itemWeek = new Date(itemDay).getDay()
//         if(item <= curDay){
//             item = {
//                 ifDisabled: true,
//                 day: item,
//                 optionName: '不可预约'
//             }
//         } else if(itemWeek == 0 || itemWeek == 6){
//             item = {
//                 ifDisabled: true,
//                 day: item,
//                 optionName: '不可预约'
//             }
//         } else {
//             item = {
//                 ifDisabled: false,
//                 day: item,
//                 optionName: '预约'
//             }
//         }
//     }   
//     return item 
// })
// console.log(lastArr,curLastDay,preloadArr,curFirstDayWeek, curFirstDay, arr)