export.js

// Paste the code below into the JavaScript console while logged in to CloudPebble for
// a link to a zip file containing all your CloudPebble projects.

console.log("Requesting export...");
Ajax.Post('/ide/transition/export', {}).then(function(data) {
    console.log("Request result: ");
    console.log(data);
    console.log("Waiting for archive. This may take a long time.");
    return Ajax.PollTask(data.task_id, {on_bad_request: console.error});
}).then(function(result) {
    console.log("Export succeeded. Download it at " + result);
}).catch(function(error) {
    console.error("Export failed.");
    console.error(error);
});

My code
https://github.com/klejnov/Pebble-Bobruisk-info/blob/master/src/js/app.js