js数组去重

用es6的Set 或者用filter

let arr = [1,2,3,3,6,6,77,9,3,2,1,23,68]
  let result = [...new Set(arr)]
  console.log(result)

  let value = arr.filter((ele,index,arr) => {
   return arr.indexOf(ele) === index
    
  })
  console.log(value)