Question

A在React JS中有一个数组对象，我想循环遍历它。

我的代码如下：

let data = [
    {make: "Volkswagen", models: ["Golf", "Passat", "Polo", "Tiguan"]},
    {make: "Skoda", models: ["Fabia", "Octavia", "Superb"]},
    {make: "Audi", models: ["A1", "A3", "A5", "Q3", "Q5"]}
];    

export default class makeModel extends React.Component {
    constructor(props) {
        super(props);
        this.state = {
            show: false,
            make: null
        }
    }

    handleMake(event){
        event.preventDefault();
        this.setState({make: event.target.name, show: !this.state.show});
    }

    render() {
        const language = this.props.language;
        let style = {display: "none"};

        if(this.state.show) style = {display: "block"};
        return (
            <div>
                <div className="priceTitle">{language.makeAndModel}</div>
                {data.map( (car, i) => {
                    return (
                        <div key={i} className="makeModel">
                            <Link to="/" className="make" name={car.make} onClick={this.handleMake.bind(this)}>{car.make}</Link>
                            <div className="models" style={style}>
                                {car.models.map((m, i) => {
                                    if(car.models.indexOf(m) > -1 && car.make === this.state.make){
                                        return <div key={i}>{m}</div>
                                    }
                                })}
                            </div>
                        </div>
                    )
                })}
            </div>
        );
    }
}

我想显示所有品牌的清单。然后点击我想要显示的所有模型。

我的代码有效。但是onClick上显示了所有三个带有类模型的div。但只有在点击的模型中才会显示模型。如何使用类模型隐藏所有div并仅显示所单击的div？

通常，有没有更好的方法呢？

Answer 1

试试这个：

import React from 'react';

let data = [
{make: "Volkswagen", models: ["Golf", "Passat", "Polo", "Tiguan"]},
{make: "Skoda", models: ["Fabia", "Octavia", "Superb"]},
{make: "Audi", models: ["A1", "A3", "A5", "Q3", "Q5"]}
];

const ModelLink = ({models,make,handleMake,isDisplay}) => {

const modelList = isDisplay ? models.map((m, i) =>  <div key={i}>{m}</div>) : "";

return (
     <div className="makeModel">
            <h3 to="/" className="make" name={make} onClick={handleMake}>{make}</h3>
            <div className="models" >
                {modelList}
            </div>
     </div>
)

}

export default class makeModel extends React.Component {
constructor(props) {
    super(props);
    this.state = {
        selectedMake: null
    }
}

handleMake(event,name){
    event.preventDefault();

    const nextMake = this.state.selectedMake !== name ? name : null;

    this.setState({selectedMake: nextMake});
}

render() {
    const {selectedMake} = this.state;
    return (
        <div>
            {data.map((car, i) => {
                return (
                    <ModelLink key={i} 
                            models={car.models} 
                            make={car.make} 
                            isDisplay={car.make === selectedMake} 
                            handleMake={(e) => this.handleMake(e,car.make)} 
                    />
                )
            })}
        </div>
    );
}
}

显示隐藏内容onClick in react JS

1 个答案: