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fix the list rendering example #458

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Nov 5, 2021
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fix the list rendering example #458

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29 changes: 16 additions & 13 deletions pages/docs/react/latest/arrays-and-keys.mdx
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Original file line number Diff line number Diff line change
Expand Up @@ -101,21 +101,24 @@ In case you ever want to render a `list` of items, you can do something like thi

```res
type todo = {id: string, text: string}
let todoList = list{
{id: "todo1", text: "Todo 1"},
{id: "todo2", text: "Todo 2"}
}

let items =
todoList
->Belt.List.toArray
->Belt.List.map((todo) => {
<li key={todo.id}>
{React.string(todo.text)}
</li>
})
@react.component
let make = () => {
let todoList = list{
{id: "todo1", text: "Todo 1"},
{id: "todo2", text: "Todo 2"},
}

let items =
todoList
->Belt.List.toArray
->Belt.Array.map(todo => {
<li key={todo.id}> {React.string(todo.text)} </li>
})

<div> {React.array(items)} </div>
}

<div> {React.array(items)} </div>
```

We use `Belt.List.toArray` to convert our list to an array before creating our `array<React.element>`. Please note that using `list` has performance impact due to extra conversion costs.
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