Immediately invoked named function - babel vs typescript issue












0















When I use typescript to compile this function, it works fine. But when I use babel with the typescript plugin, it says checkForRenewedToken is not defined



let data;
let newToken;
await new Promise(resolve => {
(async function checkForRenewedToken() {
newToken = getToken()
if (!newToken) {
setTimeout(checkForRenewedToken, 1000); <--- checkForRenewedToken is not defined
} else {
data = await doCall(newToken);
resolve(data);
}
})();
});
return data;


For babel to be happy, I have to change it like this:



let data;
let newToken;
await new Promise(resolve => {
const checkForRenewedToken = async () => {
newToken = getToken()
if (!newToken) {
setTimeout(function () {
checkForRenewedToken(); <--- now it's happy
}, 1500);
} else {
data = await doCall(newToken);
resolve(data);
}
};
checkForRenewedToken();
});
return data;


Why is typescript able to compile this ok but babel with @babel/preset-typescript plugin isn't?










share|improve this question



























    0















    When I use typescript to compile this function, it works fine. But when I use babel with the typescript plugin, it says checkForRenewedToken is not defined



    let data;
    let newToken;
    await new Promise(resolve => {
    (async function checkForRenewedToken() {
    newToken = getToken()
    if (!newToken) {
    setTimeout(checkForRenewedToken, 1000); <--- checkForRenewedToken is not defined
    } else {
    data = await doCall(newToken);
    resolve(data);
    }
    })();
    });
    return data;


    For babel to be happy, I have to change it like this:



    let data;
    let newToken;
    await new Promise(resolve => {
    const checkForRenewedToken = async () => {
    newToken = getToken()
    if (!newToken) {
    setTimeout(function () {
    checkForRenewedToken(); <--- now it's happy
    }, 1500);
    } else {
    data = await doCall(newToken);
    resolve(data);
    }
    };
    checkForRenewedToken();
    });
    return data;


    Why is typescript able to compile this ok but babel with @babel/preset-typescript plugin isn't?










    share|improve this question

























      0












      0








      0








      When I use typescript to compile this function, it works fine. But when I use babel with the typescript plugin, it says checkForRenewedToken is not defined



      let data;
      let newToken;
      await new Promise(resolve => {
      (async function checkForRenewedToken() {
      newToken = getToken()
      if (!newToken) {
      setTimeout(checkForRenewedToken, 1000); <--- checkForRenewedToken is not defined
      } else {
      data = await doCall(newToken);
      resolve(data);
      }
      })();
      });
      return data;


      For babel to be happy, I have to change it like this:



      let data;
      let newToken;
      await new Promise(resolve => {
      const checkForRenewedToken = async () => {
      newToken = getToken()
      if (!newToken) {
      setTimeout(function () {
      checkForRenewedToken(); <--- now it's happy
      }, 1500);
      } else {
      data = await doCall(newToken);
      resolve(data);
      }
      };
      checkForRenewedToken();
      });
      return data;


      Why is typescript able to compile this ok but babel with @babel/preset-typescript plugin isn't?










      share|improve this question














      When I use typescript to compile this function, it works fine. But when I use babel with the typescript plugin, it says checkForRenewedToken is not defined



      let data;
      let newToken;
      await new Promise(resolve => {
      (async function checkForRenewedToken() {
      newToken = getToken()
      if (!newToken) {
      setTimeout(checkForRenewedToken, 1000); <--- checkForRenewedToken is not defined
      } else {
      data = await doCall(newToken);
      resolve(data);
      }
      })();
      });
      return data;


      For babel to be happy, I have to change it like this:



      let data;
      let newToken;
      await new Promise(resolve => {
      const checkForRenewedToken = async () => {
      newToken = getToken()
      if (!newToken) {
      setTimeout(function () {
      checkForRenewedToken(); <--- now it's happy
      }, 1500);
      } else {
      data = await doCall(newToken);
      resolve(data);
      }
      };
      checkForRenewedToken();
      });
      return data;


      Why is typescript able to compile this ok but babel with @babel/preset-typescript plugin isn't?







      javascript typescript async-await babel babel-loader






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Nov 15 '18 at 23:50









      TetraDevTetraDev

      7,44223243




      7,44223243
























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