How to control errors in http.post?

Question

I have this code to save information in Firebase, it works perfectly but I need to check if it gives me any kind of error, for example that there is no internet connection.

How do I do it?

Thank's

saveData( data: Data ) {
   return this.http.post(`${ this.url }/dataX.json`, data)
       .pipe(
           map( res => {
             return res;
            })
         )
      ;
 }

andsilver · Accepted Answer · 2020-07-11 12:00:22Z

1

There are two options to check errors:

Receive the error in subscription section.

yourService.saveData(xxx).subscribe(
    (res) => {
        // Successful Response
    },
    (err) => {
        // Error handling
    }

Catch the error using catchError rxjs operator

return this.http.post(`${ this.url }/dataX.json`, data)
   .pipe(
        catchError(err => {
            // Error handling
        })
   );

answered Jul 11, 2020 at 12:00

andsilver

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