API call and Navigation controls with SurveyJS

Question

I am using SurveyJS (https://surveyjs.io/) to make a simple site with few questions. I am able to do all my logic with the options provided by SurveyJS.

However, what I'm looking to do is:

Make an API call after one of the question (working as expected)
Wait for the API call before moving to the next question (working as expected)
If the API responds false, do NOT move to the next question. (not working)

No matter what I do, the survey continues to move to next question and I want to avoid that in this case.

Three callbacks that are available:

// triggers before the current page goes away
survey.onCurrentPageChanging.add(function (sender, options) {
    if(survey.data.year === "1991") {
        // let's say I want to stop user from going forward at this point.
        // how can I do that?
    }
});


// triggers after the current page is gone and new page is about to appear
survey.onCurrentPageChanged.add(function (sender) {

});


// triggers right before the survey is about to finish - the last page
survey.onCompleting.add(function (sender, options) {

});

Thank you for your time.

Whoever is going to downvote, please explain yourself. Do you even understand the question or know what SurveyJS is? — ᴛʜᴇᴘᴀᴛᴇʟ, Dec 03 '18 at 06:21
I am not a downvoter, but you need to show your code if you want some help. — Just code, Dec 03 '18 at 06:33
There is not much to show with SurveyJS but I will update with 3 callbacks that the library provides. — ᴛʜᴇᴘᴀᴛᴇʟ, Dec 03 '18 at 06:42

score 1 · Accepted Answer · answered Dec 03 '18 at 07:26

1

survey.onCurrentPageChanging.add(function (sender, options) {
    if(survey.data.year === "1991") {
        // This prevents survey go to the next page
        options.allowChanging = false;
    }
});

answered Dec 03 '18 at 07:26

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API call and Navigation controls with SurveyJS

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