let date = '2021年11月'
// console.log(`${date.split('年')[0]}-${date.split('年')[1].split('月')[0]}`)
date = `${date.split('年')[0]}-${date.split('年')[1].split('月')[0]}`
console.log(date)
let date1 = '2021-04-08'
// console.log(date1.slice(0,7))
let obj = [
{
date:'2021-10-20'
},
{
date:'2021-11-20'
},
{
date:'2021-11-20'
}
]
obj = obj.filter( item => item.date.slice(0,7) === date)
console.log(obj)