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await 是 ReactJS 中的保留字错误

[英]await is a reserved word error in ReactJS

I'm new to ReactJS and I have used simple-oauth to connect to a test API.我是 ReactJS 的新手,我使用simple-oauth连接到测试 API。 I have added the client id, client secret, username and password as well as the oauth token url.我已经添加了客户端 ID、客户端密码、用户名和密码以及 oauth 令牌 url。 I'm getting syntax error await is a reserved word (40:21)我收到语法错误await is a reserved word (40:21)

Below is my current code which is a sample from simple-oauth:-以下是我当前的代码,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);
}

I also tried async function.我也试过异步功能。 Though the error gone, the console log isn't being triggered.虽然错误消失了,但没有触发控制台日志。 Here's the async function code:-这是异步函数代码:-

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

What could be wrong in the code?代码中可能有什么问题? please help.请帮忙。

I also tried async function.我也试过异步功能。 Though the error gone, the console log isn't being triggered.虽然错误消失了,但没有触发控制台日志。

Because you didn't call your function.因为你没有调用你的函数。 What you need is a Self Invoking Function :你需要的是一个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);
  })();

The lines of code are not getting triggered.代码行没有被触发。 You will need to wrap into the async function and call the function from somewhere componentDidMount will be a good place.您将需要包装到 async 函数中并从某个地方调用该函数componentDidMount将是一个好地方。

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();
}

You have to declare the componentWillMount (or componentDidMount ) as async in order to use await .您必须将componentWillMount (或componentDidMount )声明为async才能使用await You can do that by changing the signature: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});
}
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,
  });
}

}; };

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