How to render nested array elements in React?

问题

I want to render nested array elements. To render elements I used .map but it is not working for second array.

Using list=[{value: 'One', list:[{value: 'abc', selected: false}, {value: 'efg', selected: false}]}, {value: 'Two', list: [{value: 'psr', selected: false}]}];

   list.map((item, index) => {
        return (
          <div key={index}>
            <ul >{item.value}</ul>
            item.list.map((subitem, i) => {
              return (
                 <ul >{subitem.value}</ul>
              )
            })
          </div>
        )
      })

Am I missing anything here?

Thanks

回答1:

Try this. You missed { } before your second map

 list.map((item, index) => {
            return (
              <div key={index}>
                <ul >{item.value}</ul>
               {
                item.list.map((subitem, i) => {
                  return (
                     <ul ><li>{subitem.value}</li></ul>
                  )
                })
               }
              </div>
            )
          }

DEMO: https://jsfiddle.net/jwm6k66c/2611/

来源：https://stackoverflow.com/questions/43756283/how-to-render-nested-array-elements-in-react