小编典典

反应:映射对象的嵌套数组

reactjs

我试图映射对象数组,每个数组包含另一个嵌套的对象数组。但是,该映射不适用于嵌套数组。我如何在嵌套数组的内容上进行映射,同时使所有的父对象保持content相同title

小提琴: https :
//jsfiddle.net/69z2wepo/249197/

数据结构如下:

[
  {
    title: "title1",
    content: [
      {
        imageUrl: "http://placehold.it/300x300",
        title: "Campaigns",
        description:
          "Short description explaining the use of this design in a single sentence."
      },
      {
        imageUrl: "http://placehold.it/300x300",
        title: "Events",
        description:
          "Short description explaining the use of this design in a single sentence."
      },
      {
        imageUrl: "http://placehold.it/300x300",
        title: "General",
        description:
          "Short description explaining the use of this design in a single sentence."
      }
    ]
  },
  {
    title: "title2",
    content: [
      {
        imageUrl: "http://placehold.it/300x300",
        title: "Video Template A",
        description:
          "Short description explaining the use of this design in a single sentence."
      },
      {
        imageUrl: "http://placehold.it/300x300",
        title: "Video Template A",
        description:
          "Short description explaining the use of this design in a single sentence."
      }
    ]
  }
];

地图看起来像

{dataItems.map((item, index) => {
  return (
    <h1>{item.title}</h1>
    // for each item, loop over the content array objects
    <img src={item.content.imageUrl} />
    <h3>{item.content.title}</h3>
    <h3>{item.content.description}</h3>
    <hr />
  );
})}

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2020-07-22

共1个答案

小编典典

由于每个元素都有一个content数组,因此您也必须map结束content

{dataItems.map((item, index) => (
  <div key={index}>
    <h1>{item.title}</h1>
    {item.content.map((c, i) => (
      <div key={i}>
        <img src={c.imageUrl} />
        <h3>{c.title}</h3>
        <h3>{c.description}</h3>
        <hr />
      </div>
    ))}
  </div>
))}
2020-07-22