external-html plug-in, can I have a variable for the url parameter?

[gklcity]

Dear All,

I have an experiment where the user gets custom scores for each answer they give, and in the end I have four different pages with feedback depending on the range that they scored. Would it be possible to do something like the following?
var player_score;
var trial = {
type: jsPsychExternalHtml,
url: ${player_score},
cont_btn: "start",
check_fn: check_consent
};

Best Regards,
George

[cookesan]

Yes. Make url a dynamic parameter.

The external-html plugin defines url as a normal plugin parameter, so it can be a function that is evaluated when the trial runs. For example:

const feedback_trial = {
  type: jsPsychExternalHtml,
  url: () => {
    return score >= 80 ? "feedback-high.html" : "feedback-low.html";
  },
  cont_btn: "continue"
};

If the score is produced by an earlier trial, store it in a variable or read it from jsPsych.data inside that function. The important part is not to compute the URL once when the timeline is declared if the score is not known yet.

[gklcity]

Thank you so much, it worked a treat. Just to say that the ${final_address} version produced an error (I probably needed to escape the curly brackets?), but the lambda function worked great.