Question

我是ReactJS的新手，并且我已经使用simple-oauth连接到测试API。我添加了客户端ID，客户端密码，用户名和密码以及oauth令牌URL。我收到语法错误await is a reserved word (40:21)

下面是我当前的代码，它是来自simple-oauth的示例：-

const credentials = {
  client: {
    id: "CLIENT_ID",
    secret: "CLIENT_SECRET"
  },
  auth: {
    tokenHost: "http://localhost/oauth/token"
  }
};

const oauth2 = require('simple-oauth2').create(credentials);

const tokenConfig = {
  username: "USERNAME",
  password: "PASSWORD",
  scope: '<scope>',
};

try {
  const result = await oauth2.ownerPassword.getToken(tokenConfig);
  const accessToken = oauth2.accessToken.create(result);
} catch (error) {
  console.log('Access Token Error', error.message);
}

我也尝试了异步功能。尽管错误消失了，但控制台日志并未被触发。这是异步功能代码：-

async () => {
  const result = oauth2.ownerPassword.getToken(tokenConfig);
  const accessToken = oauth2.accessToken.create(result);
  // no console.log in the debugger
  console.log(result);
};

代码中可能有什么问题？请帮忙。

Answer 1

我也尝试了异步功能。虽然错误消失了，但控制台日志没有被触发。

因为您没有调用函数。您需要的是Self Invoking Function：

(async () => {
    const result = oauth2.ownerPassword.getToken(tokenConfig);
    const accessToken = oauth2.accessToken.create(result);
    // no console.log in the debugger
    console.log(result);
  })();

Answer 2

未触发代码行。您将需要包装到async函数中，然后从componentDidMount某个合适的位置调用该函数。

const funcName = async () => {
const result = await oauth2.ownerPassword.getToken(tokenConfig);
const accessToken = oauth2.accessToken.create(result);
// no console.log in the debugger
console.log(result);
};

componentDidMount(){
  this.funcName();
}

Answer 3

您必须将componentWillMount（或componentDidMount）声明为async才能使用await。您可以通过更改签名来做到这一点：

async componentWillMount() {

  const result = await oauth2.ownerPassword.getToken(tokenConfig);
  const resultJson = await result.json();
  const accessToken = await oauth2.accessToken.create(resultJson);
  const accessTokenJson = await accessToken.json();

  //if you need
  this.setState({
    accessTokenJson,
  });

  //For debugging
  console.log('result', {resultJson, accessTokenJson});
}

Answer 4

handleSubmit = async (e) => {
e.preventDefault();
console.log("form Submit ", this.state);
const { email, password } = this.state;

try {
  const config = {
    "content-type": "application/json",
  };
  this.setState({ loading: true });
  const { data } = await axios.post(
    "/api/users/login",
    {
      email,
      password,
    },
    config
  );
} catch (e) {
  console.error("Error Login!", e);
  this.setState({
    error: e.response.data.message,
  });
}

};

await是ReactJS中的保留字错误

4 个答案: