I am reading a CSV file using csv-parser npm module createReadStream.
export default async function main() {
const readstream = fs.createReadStream('src/working_file.csv');
stream.on('data', data => {
const val = await fun(param1, param2, param3);
});
fun(param1, param2, param3){
return true;
}
}
I have to call function fun with await but it is throwing me the error.await is only valid in async function. Can anyone help me how to fix this?
Just indicate that the callback function is async.
stream.on('data', async data => {
// Do async stuff
})
The function that you await must return a promise.
export default async function main() {
const readstream = fs.createReadStream('src/working_file.csv');
stream.on('data', async data => {
try{
const val = await fun(param1, param2, param3);
} catch(err) {
//handle error
}
});
fun(param1, param2, param3){
return new Promise((resolve, reject)=>{
resolve(some_value)
})
}
}
async and that very change means it does return a promise, by definition. An expression that is awaited is wrapped in a promise meaning that anything may be awaited