How to handle POST request in reactjs? - reactjs

Question

I have my ReactJS app running in http://localhost:3000/. I am receiving below form data to my React page as a POST request
<form action="http://localhost:3000/" method="post">
Employee Id: <input type="text" name="eid"><br>
Department Id: <input type="text" name="did"><br>
<input type="submit" value="Submit">
</form>
My react app should be able to handle this POST request and render the UI as below
<h1>{eid}</h1>
<h1>{did}</h1>
I am able to handle GET request using react router but struggling to handle POST request. How can I achieve this?

Answer 1

That is not possible if your React app is static(not server side rendered).
When you send some POST request to your react app, nginx(or other server) will not allow that kind of action(you cannot post to static files)
Even if you bypass that restriction, react script will not have any data from your POST request, because nginx will process your request and return just a html with react script to you

Answer 2

It will not work like php.. you need to have something like backend (node or php to pass the data) or even some site to accept the request..

Answer 3

First, you need maybe some theoretical view:
https://pusher.com/tutorials/consume-restful-api-react
https://www.robinwieruch.de/react-hooks-fetch-data
You should firstly save data
You save them to the state
You display them in the part where it is rendered
To download data from api (GET)- you don't do it directly in form - you only use either ComponentDidMount or UseEffect.
componentDidMount() {
fetch(ApiURL)
.then(res => res.json())
.then(res => this.setState({ planets: res }))
.catch(() => this.setState({ hasErrors: true }));
}
useEffect(async () => {
const result = await axios(
ApiURL,
);
setData(result.data);
});
To send data to api (POST)- It's complicated - you need information about client-server communication
Straight from the React docs:
fetch('https://mywebsite.com/endpoint/', {
method: 'POST',
headers: {
'Accept': 'application/json',
'Content-Type': 'application/json',
},
body: JSON.stringify({
firstParam: 'yourValue',
secondParam: 'yourOtherValue',
})
})