How to use a JavaScript value inside EJS

Question

How can I use a JavaScript value inside an EJS statement?

E.g. I grab the value of a select option with JavaScript and want to load data from an object depending on the value.

var gerichtSelectID = $("#gericht" + id).val(); //e.g. 8
var gerichtPreisID = <%= gerichte.data[gerichtSelectID].preis_id %>; // should be gerichte.data[8].preis_id

Answer 1

EJS values can't be modified in JavaScript, but the easiest solution is to convert the EJS object into JSON.

var gerichte = <%- JSON.stringify(gerichte) %>;
var gerichtSelectID = $("#gericht" + id).val();
var gerichtPreisID = gerichte.data[gerichtSelectID].preis_id;