The promise briefly returns a placeholder object before resolving with the actual response

Currently, I am working on a simple check to determine whether myAnswer contains an answer. The checking functionality is operating smoothly; however, the issue arises in the final function that aims to return the string obtained from myAnswer. Instead of directly returning the string, it displays [object Promise]. This behavior is puzzling as I expect the resolved promise to return the string instead.

I would appreciate any assistance or insights on this matter!

this.myAnswer = XapiStoreService.retrieveQuestionFillIn(this.app.getStudent(), pages[pageIndex])
                .then((answer:string) => {
                  this.myAnswer = answer;
                }, (reason:string) => {
                  this.myAnswer = '';
                });
typescriptpromise

Answer №1

You are currently

setting the value of this.myAnswer using XapiStoreService.retrieveQuestionFillIn(…).then(…);

This action creates a promise for myAnswer. However, you will only briefly see this before the promise is resolved and updates the myAnwer variable. It is likely that you actually intend to do something like

this.myAnswer = "loading";
XapiStoreService.retrieveQuestionFillIn(this.app.getStudent(), pages[pageIndex]).then((answer:string) => {
    this.myAnswer = answer;
}, (reason:string) => {
    this.myAnswer = 'error';
    console.error(reason);
});

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