javascript - 在迭代 JSON 数组时出现错误：“data.id is undefined”

Question

尝试在数组中记录数据但出现错误：data.id is undefined

{
  youtube.map((item, index) => {
    return console.log(youtube.id);
  });
}

这是正在映射的 JSON 数组：

{
  "youtube":[
    {
      "id":"https://www.youtube.com/embed/hogbutbOgbo",
      "title":"YouTube video player"
    },
    {
      "id":"HHJkUQGm2H8",
      "title":"YouTube video player"
    },
    {
      "id":"fEE4RO-_jug",
      "title":"YouTube video player"
    },
    {
      "id":"dpqelE_9OgA",
      "title":"YouTube video player"
    },
    {
      "id":"u1NlmFa0-68",
      "title":"YouTube video player"
    },
    {
      "id":"qoUxP_h6DRs",
      "title":"YouTube video player"
    }
  ]
}

标签： javascriptarraysjson

Answer 1

您正在记录主数组而不是映射项，请尝试更改为：

console.log(item.id)