I try to fetch some data from an API. The API is formatted like this:
[
{
"1": {
"appid": 1,
"name": "bmw"
},
"2": {
"appid": 2,
"name": "mercedes"
},
"3": {
"appid": 3,
"name": "tesla"
}
}
]
And in react my app.js looks like this:
import React, { useState, useEffect } from "react";
import axios from "axios";
import ItemsGrid from "./components/items/ItemsGrid";
function App() {
const [items, setItems] = useState([]);
const [isLoading, setIsLoading] = useState(true);
useEffect(() => {
const fetchItems = async () => {
const result = await axios({
url: "http://localhost:3013/items",
method: "get",
timeout: 8000,
headers: {
"Content-Type": "application/json",
},
});
console.log(result.data);
setItems(result.data);
setIsLoading(false);
};
fetchItems();
}, []);
return (
<div className="App">
<ItemsGrid isLoading={isLoading} items={items} />
<h1>Hello</h1>
</div>
);
}
export default App;
And the ItemsGrid:
import React from "react";
const ItemsGrid = ({ items, isLoading }) => {
return isLoading ? (
<h1>Loading...</h1>
) : (
<div>
{items.map((item) => (
<h1 key={item.appid}>{item.name}</h1>
))}
</div>
);
};
export default ItemsGrid;
So nothing is to see beacause I don’t know how to access the array. In the console log I see there is something:
[{…}]
0: {1: {…}, 2: {…}, 3: {…}}
length: 1
__proto__: Array(0)
Anyone know how to show the names via mapping?
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Answer
If you want to turn the array with an object into a regular array you can use Object.values on the first element of the array:
useEffect(() => {
const fetchItems = async () => {
const result = await axios({
url: "http://localhost:3013/items",
method: "get",
timeout: 8000,
headers: {
"Content-Type": "application/json",
},
});
setItems(Object.values(result.data[0]));
setIsLoading(false);
};
fetchItems();
}, []);