SyntaxError: await is only valid in async function in Nodejs
Dung Do Tien
Jun 25 2022
401
Hi you guys, I have created a small Nodejs application, that will help pull a list of user information from an API and display it on the browser. I used express to help create a web server with local port 5000.
I use node-fetch package to help fetch data from an API, you can see like this:
const fetch = require('node-fetch');
var express = require('express');
var app = express();
app.get('/', function (req, res) {
const result = await getUser();
console.log(result);
});
var server = app.listen(5000, function () {
console.log('Server is running..');
});
async function getUser() {
try {
const response = await fetch('https://randomuser.me/api/');
if (!response.ok) {
throw new Error(`Error! status: ${response.status}`);
}
const result = await response.json();
return result;
} catch (err) {
console.log(err);
}
}
I used fetch() method as an async method but when running the code above I got an exception : SyntaxError: await is only valid in async function.
SyntaxError: await is only valid in async function
←[90m at wrapSafe (internal/modules/cjs/loader.js:1053:16)←[39m
←[90m at Module._compile (internal/modules/cjs/loader.js:1101:27)←[39m
←[90m at Object.Module._extensions..js (internal/modules/cjs/loader.js:1157:10)←[39m
←[90m at Module.load (internal/modules/cjs/loader.js:985:32)←[39m
←[90m at Function.Module._load (internal/modules/cjs/loader.js:878:14)←[39m
←[90m at Function.executeUserEntryPoint [as runMain] (internal/modules/run_main.js:71:12)←[39m
←[90m at internal/main/run_main_module.js:17:47←[39m
I use Node version v12.18.3.
Please help me if you have any solution.
Thank you in advance.
Have 1 answer(s) found.
-
A0
Akarsh Pissey Jun 25 2022
Note important: You call the async B method inside the A method. The A method has to async method too.
Solution: make the
app.get()as an async method. See the example below:// A method app.get('/', async (req, res) => { // update this line change from synchonous to asynchronous const result = await getUser(); console.log(result); }); // B method async function getUser() { try { const response = await fetch('https://randomuser.me/api/'); if (!response.ok) { throw new Error(`Error! status: ${response.status}`); } const result = await response.json(); return result; } catch (err) { console.log(err); } }It will solve the issue for you.
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