how to post the time ReactJs

I explain my problem of the day

in the following code, I post objects

my question, is it possible to post the time at which the post was made?

postbackend = () =>{
const config = {    
method: "POST",
headers: {
  "Content-Type": "application/json",
},
body: JSON.stringify({...this.state, items:this.props.items}),
};
const url = entrypoint + "/alluserpls"; 
fetch(url, config)
.then(res => res.json())
.then(res => {
  if (res.error) {
    alert(res.error);
  } else {
    alert(`ajouté avec l'ID ${res}!`);
  }
}).catch(e => {
  console.error(e);
}).finally(()=>this.setState({ redirect: true }));
}

I would simply like to recover the time at which the post was made Do you have an idea of how to fix this? Neff