[英]How to pass parameter to other component to show details of list from API on button click in react.js
[英]Getting details of a single item from a json list using a new details component in React
我是 React 的新手,当在 React 中从另一个 Details 组件单击一个项目时,我面临获取项目详细信息的问题。 我有 MenuComponent.js,它应该在单击任何卡片时调用 DishDetailComponent.js,但是当我这样做时,我的菜肴详细信息组件出现错误
const DishDetail = this.props( (selectedDish)=> { })
this.props 不是一个函数。 下面是 Menu Component 中用来调用 DishDetail 组件的代码
import React, { Component } from 'react';
import { Media } from "reactstrap";
import { Card, CardImg, CardImgOverlay, CardText, CardBody, CardTitle } from
"reactstrap";
import DishDetail from './DishDetailComponent.js';
class Menu extends Component {
constructor(props) {
super(props);
this.state = {
selectedDish: null
};
}
onDishSelect(dish) {
this.setState({selectedDish: dish})
}
render() {
const menu = this.props.dishes.map((dish)=> {
return (
<div key={dish.id} className="col-12 col-md-5 m-1">
<Card onClick={()=>this.onDishSelect(dish)}>
<CardImg width="100%" src={dish.image} alt={dish.name} />
< CardImgOverlay>
<CardTitle>{dish.name}</CardTitle>
<p>{dish.description}</p>
</CardImgOverlay>
</Card>
</div>
);
});
return(
<div className="container">
<div className="row">
{menu}
</div>
<div className="row">
<DishDetail selectedDish={this.state.selectedDish}/>
</div>
</div>
);
}
}
export default Menu;
这是我的 DishDetail 组件,它给我带来了问题
import React, { Component } from 'react';
import { Card, CardImg, CardImgOverlay, CardText, CardBody, CardTitle } from
"reactstrap";
class DishDetail extends Component{
constructor(props) {
super(props);
}
render() {
const DishDetail = this.props( (selectedDish)=> {
if (selectedDish != null) {
return (
<Card>
<CardImg width="100%" src={selectedDish.image} alt={selectedDish.name} />
<CardBody>
<CardTitle>{selectedDish.name}</CardTitle>
<CardText>{selectedDish.description}</CardText>
</CardBody>
</Card>
)
} else {
return (
<div></div>
);
}
});
return (
<div className="container">
<div className="row">
{DishDetail}
</div>
</div>
)
}
}
export default DishDetail;
谢谢
这应该有效:
import React, { Component } from 'react';
import { Card, CardImg, CardImgOverlay, CardText, CardBody, CardTitle } from
'reactstrap';
class DishDetail extends Component{
constructor(props) {
super(props);
}
renderDish(dish) {
if (dish != null)
return(
<Card>
<CardImg top src={dish.image} alt={dish.name} />
<CardBody>
<CardTitle>{dish.name}</CardTitle>
<CardText>{dish.description}</CardText>
</CardBody>
</Card>
);
else
return(
<div></div>
);
}
render() {
return (
<div className="container">
<div className="row">
{this.renderDish(this.props.selectedDish)}
</div>
</div>
)
}
}
export default DishDetail;
this.props
不是一个函数,它是一个对象。 试着这样写你的DishDetail
。
import React, { Component } from 'react'; import { Card, CardImg, CardImgOverlay, CardText, CardBody, CardTitle } from "reactstrap"; class DishDetail extends Component{ constructor(props) { super(props); } render() { const { selectedDish } = this.props; const DishDetail = () => { if (selectedDish) { return ( <Card> <CardImg width="100%" src={selectedDish.image} alt={selectedDish.name} /> <CardBody> <CardTitle>{selectedDish.name}</CardTitle> <CardText>{selectedDish.description}</CardText> </CardBody> </Card> ) } return ( <div /> ); } return ( <div className="container"> <div className="row"> {DishDetail} </div> </div> ) } } export default DishDetail;
import React, { Component } from 'react';
import { Card, CardImg, CardImgOverlay, CardText, CardBody, CardTitle } from
"reactstrap";
const DishDetail = ({ selectedDish }) => {
return (
<div className="container">
<div className="row">
{ selectedDish &&
<Card>
<CardImg width="100%" src={selectedDish.image} alt={selectedDish.name} />
<CardBody>
<CardTitle>{selectedDish.name}</CardTitle>
<CardText>{selectedDish.description}</CardText>
</CardBody>
</Card>
}
</div>
</div>
)
};
export default DishDetail;
这个组件的目的是展示信息,所以这里的功能组件是更好的选择(而不是类),但对此没有限制,只是一个建议。 尝试遍历代码并理解它,如果有任何问题,请不要担心。
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