REACT fetch post request
I guess the way you are using ref has been deprecated. try below see if you have any luck.
export default class Form extends React.Component { constructor(props){ super(props); this.handleSubmit = this.handleSubmit.bind(this); } handleSubmit(event){ event.preventDefault(); fetch('/', { method: 'post', headers: {'Content-Type':'application/json'}, body: { "first_name": this.firstName.value } }); }; render () { return ( <div id="signup"> <form onSubmit={this.handleSubmit}> <input ref={(ref) => {this.firstName = ref}} placeholder="First Name" type="text" name="first_name"/><br /> <input ref={(ref) => {this.lastName = ref}} placeholder="Last Name" type="text" name="last_name"/><br /> <button type="Submit">Start</button> </form> </div> ) }}Here is a link to react docs about refs
we need to make sending data as json stringify
handleSubmit(event){ event.preventDefault(); fetch('/', { method: 'post', headers: {'Content-Type':'application/json'}, body: JSON.stringify({ "first_name": this.state.firstName }) });};
This is how I made my post request in React.js;
const res = fetch('http://15.11.55.3:8040/Device/Movies', { method: 'post', headers: { 'Content-Type': 'application/json' }, body: { id: 0, }, }) .then((response) => response.json()) .then((responseJson) => { return responseJson.movies; }) .catch((error) => { console.error(error); });