防止 reactjs 中 axios 错误的默认事件

Question

I want to prevent opening of link in react if axios.post gets error. I used event.preventDefault but it isnt stopping the link from opening on button click. Here is the code

<Link
to={{
  pathname: '/',
  data: "success",
}}
>
<div>
  <Button
    onClick={this.onSubmit}
    variant="contained"
    color="secondary"
  >
    Post
  </Button>
</div>
</Link>
onSubmit=(ev)=>{
   let data = {
          title: this.state.title,
          content: this.state.content,
          username: this.state.data.xusername,
          date: new Date().toUTCString(),
        };
        Axios.post("http://localhost:9000/posts", data)
          .then((response) => {
            console.log(response);
          })
          .catch((error) => {
            ev.preventDefault();
            console.log(error);
          });
}

Answer 1

Having a button nested within a link is your problem. This means that when you click the button, it's the button event your preventing default on.

If you want to redirect to another page upon axios call completion, you could do so with something like this:

<Button
  onClick={this.onSubmit}
  variant="contained"
   color="secondary"
>
  Post
</Button>

onSubmit=(ev)=>{
let data = {
      title: this.state.title,
      content: this.state.content,
      username: this.state.data.xusername,
      date: new Date().toUTCString(),
    };
    Axios.post("http://localhost:9000/posts", data)
      .then((response) => {
        console.log(response);
        window.location.replace("/yourpage?var1=value"); // Redirect with vanilla js.
        this.props.history.push('/yourpage?var1=value&var2=value'); // Redirect with reactjs.
      })
      .catch((error) => {
        console.log(error); // On error, user will experience no change.
      });