Vue数组根据对象属性去重和数组对象去重实现方式

const dataArr = [
  {
    id: 1,
    name: '名称1'
  },
  {
    id: 2,
    name: '名称2'
  },
  {
    id: 2,
    name: '名称3'
  },
  {
    id: 2,
    name: '名称4'
  },
  {
    id: 3,
    name: '名称5'
  },
  {
    id: 4,
    name: '名称6'
  },
  {
    id: 5,
    name: '名称7'
  }
]

const a = dataArr.map(item => {
  return item.id
})
console.log(a) // ['a', 'b', 'b', 'b', 'c', 'b', 'd']

const b = dataArr.filter((item, index) => {
  return a.indexOf(item.id) === index
})
console.log(b)

[
  { id: 'a', name: '名称1' },
  { id: 'b', name: '名称2' },
  { id: 'c', name: '名称5' },
  { id: 'd', name: '名称7' }
]

const dataArr = [
    {
        id: 1,
        name: '名称1'
    },
    {
        id: 2,
        name: '名称2'
    },
    {
        id: 2,
        name: '名称2'
    },
    {
        id: 2,
        name: '名称3'
    },
    {
        id: 3,
        name: '名称4'
    },
    {
        id: 4,
        name: '名称4'
    },
    {
        id: 5,
        name: '名称5'
    }
]

const arr1 = []
const arr2 = []

for (let i = 0; i < dataArr.length; i++) {
    if (!(arr1.includes(dataArr[i].id + '-' + dataArr[i].name))) { // 1-名称1 / 2-名称2 等等。。。
        // 数组中没有就往里添加
        arr1.push(dataArr[i].id + '-' + dataArr[i].name)
        arr2.push({
            id: dataArr[i].id,
            name: dataArr[i].name
        })
    }
}

// console.log(arr2)
// [
//     { "id": 1, "name": "名称1" },
//     { "id": 2, "name": "名称2" },
//     { "id": 2, "name": "名称3" },
//     { "id": 3, "name": "名称4" },
//     { "id": 4, "name": "名称4" },
//     { "id": 5, "name": "名称5" }
// ]