How can i update the counter state each click? - reactjs

Question

I am working with an API such that on clicking button "show more" there's some counter which increases itself by 25 and display next content:
constructor(props){
this.state = { counter: 0}}
showMore = () => {
axios.get(some_random_link/append/${this.state.counter + 25}/0
}.then(res => {
this.setState({ counter: this.state.counter + 25 });
});
render(){
return(
<div>
<button onClick={this.showMore}>show more</button>
</div>
Expected:
some_random_link/append/25/0
some_random_link/append/50/0
some_random_link/append/75/0
Actual:
some_random_link/append/25/0
some_random_link/append/25/0
some_random_link/append/25/0

Answer 1

setState is an async process, hence when you want to update a state by using the previous one then do it this way
class Counter {
constructor(props) {
this.state = { counter: 0 };
}
_showMore = () => {
const { counter } = this.state;
axios.get(`some_random_link/append/${counter + 25}/0`).then(res => {
this.setState(prevState => ({ counter: prevState.counter + 25 }));
});
};
render() {
return (
<div>
<button onClick={this._showMore}>show more</button>
</div>
);
}
}

Answer 2

Call axios call after setState()
class Counter {
constructor(props) {
this.state = { counter: 0 };
}
showMore = () => {
this.setState(
({ counter }) => ({ counter: counter + 25 }),
() => {
axios.get(`some_random_link/${this.state.counter}/0`); // this.state.counter already updated
}
);
};
render() {
return (
<div>
<button onClick={this.showMore}>show more</button>
</div>
);
}
}

Answer 3

this.setState() is asynchronous! so instead of this.setState({})
change it to
this.setState(prev => counter : prev.counter + 25)
For more details check this link:
Beware: React setState is asynchronous!
class App extends React.Component {
constructor(props){
super(props)
this.state={counter:0};
}
showMore = () => {
axios
.get(`/fake/fake/fake/${this.state.counter}`)
.then(() => {
console.log("fake data");
})
.catch(() => {
console.log(this.state.counter)
this.setState(prevState => ({ counter: prevState.counter + 25 }));
});
};
render(){
return (
<span style={{background:"green",color:"#fff",padding:"15px",cursor:"pointer"}}onClick={this.showMore}>PLZ CLICK ME</span>
)
}
}
ReactDOM.render(<App />, document.querySelector('#root'));
<script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.6.3/umd/react.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.6.3/umd/react-dom.production.min.js"></script>
<script src="https://unpkg.com/axios/dist/axios.min.js"></script>
<div id="root"></div>