I'm trying to fetch my json site to enable API, but but got an error “Unexpected token < in JSON at position 0”

Question

尝试获取 Json 站点时出错。 错误是“Uncaught (in promise) SyntaxError: Unexpected token < in JSON at position 0”

我之前修复了一个与通过 {'mode':'no-cors'} 禁用 CORS 相关的错误。 然后在上面添加了这个问题

async componentDidMount() {
    const url =("http://localhost/v1/Items/GetHardWaretypes", {'mode': 'no-cors'} );

    const response = await fetch(url);
    const data = await response.json();
    console.log(data)
    this.setState({products: data.results, loading: false})
}

Answer 1

尝试将标头Content-Type和Accept添加为application/json 。

async componentDidMount() {
  const url =("http://localhost/v1/Items/GetHardWaretypes", {'mode': 'no-cors'} );

  const response = await fetch(url, { 
    'Content-Type': 'application/json',
    'Accept': 'application/json'
  });
  const data = await response.json();
  console.log(data);
  this.setState({products: data.results, loading: false})
}