Where do I add a click event in reactjs - reactjs

Question

Maybe this doesen't even look like a code, but is there any way I can change other components value/state on click?
import React from 'react';
import './pokemonList.css';
import {Component} from 'react';
import Pokemon from './Pokemon';
class PokemonList extends Component {
constructor(props){
super(props);
this.state = {
pokemons : [],
pokemon : {}
};
}
componentWillMount(){
fetch('https://pokeapi.co/api/v2/pokemon/').then(res=>res.json())
.then(response=>{
this.setState({
pokemons : response.results,
});
});
}
handleClick(id) {
fetch(`https://pokeapi.co/api/v2/pokemon/${id}/`)
.then(res => res.json())
.then(data => {
const pokemon = new Pokemon(data);
this.setState({ pokemon: pokemon });
})
.catch(err => console.log(err));
console.log("click happened");
}
render(){
const {pokemons} = this.state;
return (
<div className='pokemonList'> {pokemons.map(pokemon =>(
<button onClick={this.handleClick.bind(this)} className='pokemon-
btn' key={pokemon.name}>
{pokemon.name}
</button>
))}
</div>
)
}}
export default PokemonList;
At this point I'm not even sure where does handleClick() has to be, so I put it in my App component aswell. The output is ok, but clicking these buttons doesen't seem to do anything. They are supposed to show detailed pokemon information in component.
import React, {Component} from 'react';
import './pokemon-info.css';
const PokemonInfo = ({ pokemon }) => {
const { name,
height,
weight,
sprite,
statsSpeed,
statsSpecialDefense,
statsSpecialAttack,
statsDefense,
statsAttack,
statsHp
} = pokemon;
return (
<section className="pokemonInfo">
<img src={sprite} className='sprite-image' alt="pokemon_sprite"/>
<div className='data-wrapper'>
<h3 className="data-char">{pokemon.name}</h3><br />
<p className = 'data-char'>Height: {height}</p>
<p className = 'data-char'>Weight: {weight}</p><br />
<p className = 'data-char'>Stats: </p><br />
<p className = 'data-char'>Speed: {statsSpeed}</p>
<p className = 'data-char'>Special defense: {statsSpecialDefense}</p>
<p className = 'data-char'>Special attack: {statsSpecialAttack}</p>
<p className = 'data-char'>Defense: {statsDefense}</p>
<p className = 'data-char'>Attack: {statsAttack}</p>
<p className = 'data-char'>Hp: {statsHp}</p>
</div>
</section>
)
}
export default PokemonInfo;
Here is my App component
import React, { Component } from 'react';
import './App.css';
import PokemonList from './PokemonList';
import Pokemon from './Pokemon';
import PokemonInfo from './PokemonInfo';
class App extends Component {
constructor() {
super();
this.state = {
pokemon: {}
};
this.handleOnClick = this.handleOnClick.bind(this);
}
handleOnClick(id) {
fetch(`http://pokeapi.co/api/v2/pokemon/${id}/`)
.then(res => res.json())
.then(data => {
const pokemon = new Pokemon(data);
this.setState({ pokemon });
})
.catch(err => console.log(err));
}
render() {
return (
<div className="App">
<PokemonList />
<PokemonInfo pokemon={this.state.pokemon}/>
</div>
);
}
}
export default App;
It is obvious I did go wrong somewhere, but where?
Update:
Pokemon
class Pokemon {
constructor(data) {
this.id = data.id;
this.name = data.name;
this.height = data.height;
this.weight = data.weight;
this.sprite = data.sprites.front_default;
this.statsSpeed = data.stats[0].stats.base_stat;
this.statsSpecialDefense = data.stats[1].stats.base_stat;
this.statsSpecialAttack = data.stats[2].stats.base_stat;
this.statsDefense = data.stats[3].stats.base_stat;
this.statsAttack = data.stats[4].stats.base_stat;
this.statsHp = data.stats[5].stats.base_stat;
}
}
export default Pokemon;

Answer 1

Your App component should keep the state and pass updater functions as props to children components:
PokemonList
import React from "react";
import "./pokemonList.css";
import { Component } from "react";
import Pokemon from "./Pokemon";
class PokemonList extends Component {
render() {
const { pokemons } = this.props;
return (
<div className="pokemonList">
{pokemons.map(pokemon => (
<button
onClick={() => this.props.handleClick(pokemon.id)} // id or whatever prop that is required for request
className="pokemon-btn"
key={pokemon.name}
>
{pokemon.name}
</button>
))}
</div>
);
}
}
PokemonInfo - no change here.
APP
import React, { Component } from "react";
import "./App.css";
import PokemonList from "./PokemonList";
import Pokemon from "./Pokemon";
import PokemonInfo from "./PokemonInfo";
class App extends Component {
constructor() {
super();
this.state = {
pokemon: {},
pokemons: [],
};
this.handleOnClick = this.handleOnClick.bind(this);
}
componentDidMount() {
fetch("https://pokeapi.co/api/v2/pokemon/")
.then(res => res.json())
.then(response => {
this.setState({
pokemons: response.results
});
});
}
handleOnClick(id) {
fetch(`http://pokeapi.co/api/v2/pokemon/${id}/`)
.then(res => res.json())
.then(data => {
const pokemon = new Pokemon(data);
this.setState({ pokemon });
})
.catch(err => console.log(err));
}
render() {
return (
<div className="App">
<PokemonList pokemons={this.state.pokemons} handleClick={this.handleOnClick} />
<PokemonInfo pokemon={this.state.pokemon} />
</div>
);
}
}
More on lifting the state up.