Javascript 如何修复data.map不是函数api
我正在尝试获取和显示api的数据 我试图显示数据,但不起作用 PokemonSpecies.jsJavascript 如何修复data.map不是函数api,javascript,arrays,reactjs,api,pokemon-go,Javascript,Arrays,Reactjs,Api,Pokemon Go,我正在尝试获取和显示api的数据 我试图显示数据,但不起作用 PokemonSpecies.js import React from "react"; // import Loader from "./Loader"; import { Card, Col } from "react-bootstrap"; import { Container, Row } from "react-bootstrap"; import CardPokemon from "./containers/CardP
import React from "react";
// import Loader from "./Loader";
import { Card, Col } from "react-bootstrap";
import { Container, Row } from "react-bootstrap";
import CardPokemon from "./containers/CardPokemon";
class PokemonSpecies extends React.Component {
state = {
data: [],
isLoading: false,
abilities: []
};
async componentDidMount() {
const id = this.props.match.params.id;
this.setState({ isLoading: true });
try {
const response = await fetch(`https://pokeapi.co/api/v2/pokemon/${id}`);
const json = await response.json();
this.setState({
data: json,
isLoading: false
});
console.log({ json });
} catch (err) {
console.log(err.msg);
this.setState({ isLoading: false });
throw err;
}
}
render() {
const { data } = this.state;
return (
<div className="Pokemon">
<Container>
<Row>
<Col lg="4"></Col>
<Col lg="4">
<CardPokemon data={data} />
</Col>
<Col lg="4"></Col>
</Row>
<Row></Row>
</Container>
</div>
);
}
}
export default PokemonSpecies;
从“React”导入React;
//从“/Loader”导入加载程序;
从“react bootstrap”导入{Card,Col};
从“react bootstrap”导入{Container,Row};
从“/containers/cardpookemon”导入cardpookemon;
类PokemonSpecies扩展了React.Component{
状态={
数据:[],
孤岛加载:false,
能力:[]
};
异步组件didmount(){
const id=this.props.match.params.id;
this.setState({isLoading:true});
试一试{
const response=等待获取(`https://pokeapi.co/api/v2/pokemon/${id}`);
const json=await response.json();
这是我的国家({
数据:json,
孤岛加载:false
});
log({json});
}捕捉(错误){
console.log(err.msg);
this.setState({isLoading:false});
犯错误;
}
}
render(){
const{data}=this.state;
返回(
);
}
}
导出默认口袋妖怪;
CardPokemon.js
import React from "react";
import DataSinglePokemon from "./DataSinglePokemon";
const CardPokemon = ({ data }) => {
return (
<>
{data.map((info, index) => (
<DataSinglePokemon
key={info + index}
id={info.id}
name={info.name
.toLowerCase()
.split(" ")
.map(letter => letter.charAt(0).toUpperCase() + letter.substring(1))
.join(" ")}
height={info.height}
{...info}
/>
))}
</>
);
};
export default CardPokemon;
import React from "react";
import { Card, Col } from "react-bootstrap";
import "../../App.css";
const DataSinglePokemon = props => {
const { height, name, id } = props;
const urlImage = `https://raw.githubusercontent.com/PokeAPI/sprites/master/sprites/pokemon/${id}.png?raw=true`;
return (
<Col lg={3}>
<Card>
<Card.Header>{id}</Card.Header>
<Card.Body className="mx-auto">
<Card.Title> {name} </Card.Title>
<Card.Text>
<img alt={name} src={urlImage} />
<br></br>
Taille : {height}
</Card.Text>
</Card.Body>
</Card>
</Col>
);
};
export default DataSinglePokemon;
从“React”导入React;
从“/DataSinglePokemon”导入DataSinglePokemon;
const cardpookemon=({data})=>{
返回(
{data.map((信息,索引)=>(
letter.charAt(0.toUpperCase()+letter.substring(1))
.join(“”)
高度={info.height}
{…信息}
/>
))}
);
};
导出默认卡片口袋妖怪;
DataSinglePokemon.js
import React from "react";
import DataSinglePokemon from "./DataSinglePokemon";
const CardPokemon = ({ data }) => {
return (
<>
{data.map((info, index) => (
<DataSinglePokemon
key={info + index}
id={info.id}
name={info.name
.toLowerCase()
.split(" ")
.map(letter => letter.charAt(0).toUpperCase() + letter.substring(1))
.join(" ")}
height={info.height}
{...info}
/>
))}
</>
);
};
export default CardPokemon;
import React from "react";
import { Card, Col } from "react-bootstrap";
import "../../App.css";
const DataSinglePokemon = props => {
const { height, name, id } = props;
const urlImage = `https://raw.githubusercontent.com/PokeAPI/sprites/master/sprites/pokemon/${id}.png?raw=true`;
return (
<Col lg={3}>
<Card>
<Card.Header>{id}</Card.Header>
<Card.Body className="mx-auto">
<Card.Title> {name} </Card.Title>
<Card.Text>
<img alt={name} src={urlImage} />
<br></br>
Taille : {height}
</Card.Text>
</Card.Body>
</Card>
</Col>
);
};
export default DataSinglePokemon;
从“React”导入React;
从“react bootstrap”导入{Card,Col};
导入“../../App.css”;
const DataSinglePokemon=props=>{
const{height,name,id}=props;
常量urlImage=`https://raw.githubusercontent.com/PokeAPI/sprites/master/sprites/pokemon/${id}.png?raw=true`;
返回(
{id}
{name}
Taille:{height}
);
};
导出默认数据SinglePokeMon;
我有json,但当我试图显示Pokemon的名称或功能时,我出现了这个错误,我尝试了很多东西,但我对React js是新手…:
TypeError: data.map is not a function
CardPokemon
src/components/containers/CardPokemon.js:7
4 |
5 | const CardPokemon =({data}) =>{
6 |
> 7 | return(
8 |
9 | <>
10 | {data.map((info,index) =>(
TypeError:data.map不是函数
卡片口袋妖怪
src/components/containers/cardpookemon.js:7
4 |
5 | const cardpookemon=({data})=>{
6 |
>7 |返回(
8 |
9 |
10 |{data.map((信息,索引)=>(
我猜问题出在下面一行。你能检查一下API调用的响应吗
const response = await fetch(`https://pokeapi.co/api/v2/pokemon/${id}`);
const json = await response.json();
this.setState({
data: json, // Check the data type of json. It should be in Array.
isLoading: false
});
我猜问题在下面一行。你能检查一下API调用的响应吗
const response = await fetch(`https://pokeapi.co/api/v2/pokemon/${id}`);
const json = await response.json();
this.setState({
data: json, // Check the data type of json. It should be in Array.
isLoading: false
});
我看到您的代码运行良好,您犯的唯一错误是,
json
变量不是数组。它有一个results
键,您需要在其中映射:
请参阅此日志:
因此,您需要这样做:
const json = await response.json();
this.setState({
data: json.results,
isLoading: false
});
而不是只使用数据
下面是我创建的演示沙盒,用于查看错误:
希望这能有所帮助。我看到您的代码运行良好,您犯的唯一错误是,
json
变量不是数组。它有一个results
键,您需要在其中映射:
请参阅此日志:
因此,您需要这样做:
const json = await response.json();
this.setState({
data: json.results,
isLoading: false
});
而不是只使用数据
下面是我创建的演示沙盒,用于查看错误:
希望这有帮助。是的,在“Json”中,我有api页面上可以找到的所有内容。.map函数只能用于数组。如果我想显示不在数组中的数据,我如何显示此数据?而不是
data.map()
,您可以直接将代码编写为data.id
或data.name
。谢谢,因为我使用此api,所以每个数组都需要在this.setState中声明一个新选项卡?是的,在“Json”中我有api页面上的所有内容。map函数只能用于数组。如果我想显示不在数组中的数据,如何显示该数据?而不是data.map()
,您可以直接将代码编写为数据.id
或数据.name
。谢谢,因为我使用此api,所以每个数组都需要在this.setState中声明一个新选项卡?我明白了,谢谢,但我犯了一个错误,好的api是:,带“1”,这是一个有很多数据的口袋妖怪的id,谢谢,但我犯了一个错误好的api是:,带“1”,这是一个有很多数据的口袋妖怪的id