Syntax for Promise() in ECMA 6 is as follows:

Question

Syntax for Promise() in ECMA 6 is as follows:

Is there a way to adjust this promise code so that it throws an error whenever the response body contains an error code?

return this.httpService.post('/create', data)
                       .toPromise()
                       .then(response => response.json() as CreatedResponse)
                       .catch(this.handleCreateError);

I'm specifically looking to update the

.then(response => response.json() as CreatedResponse)

section to throw an error when response.json().hasError is true. If not, the promise should simply resolve.

angular typescript ecmascript-6

Answer 1

Answer №1

In the then section of your code, make sure to handle any potential errors that may arise. An example implementation could look like this:

return this.customService.post('/update', info)
                   .toPromise()
                   .then(res => res.json() as UpdateResponse)
                   .then(data => {
                       if (data.isError) {
                           throw Error('Data is invalid');
                       } else {
                           return data;
                       }
                   })
                   .catch(this.handleErrorUpdate);

Answer 2

In the then section of your code, make sure to handle any potential errors that may arise. An example implementation could look like this:

return this.customService.post('/update', info)
                   .toPromise()
                   .then(res => res.json() as UpdateResponse)
                   .then(data => {
                       if (data.isError) {
                           throw Error('Data is invalid');
                       } else {
                           return data;
                       }
                   })
                   .catch(this.handleErrorUpdate);

Syntax for Promise() in ECMA 6 is as follows:

Answer №1

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