Unable to integrate Webgazer to Qualtrics

Question

When I am integrating Webgazer to Qualtrics, I applied https://webgazer.cs.brown.edu/webgazer.js?" type="text/javascript"> in header and in javascript I applied webgazer.setRegression('ridge') /* currently must set regression and tracker */		.setTracker('TFFacemesh')		.setGazeListener(function(data, clock) {			counter = counter + 1;			if(data){			 dataSampleX.push(data.x);			 dataSampleY.push(data.y);			}			if(data && counter > 25){			 var avgX = parseInt(dataSampleX.reduce(getSum,0)/dataSampleX.length);			 var avgY = parseInt(dataSampleY.reduce(getSum,0)/dataSampleY.length);			 getAllBoxes({x:avgX, y:avgY});			 getAllBoxes(data);			 counter = 0;			 dataSampleX = [];			 dataSampleY = [];			}			console.log(data); /* data is an object containing an x and y key which are the x and y prediction coordinates (no bounds limiting) */			console.log(clock); /* elapsed time in milliseconds since webgazer.begin() was called */		})		.begin()		.showPredictionPoints(true); /* shows a square every 100 milliseconds where current prediction is */The error I got was "webgazer.setRegression(...).setTracker(...).setGazeListener(...).begin(...).showPredictionPoints is not a function." I don't know how to deal with this. Does anyone get any ideas?

JeremyK · Answer

A trick I was turned onto by another developer at my current shop is throwing...debugger;into the JS in Qualtrics. You're in essence setting a breakpoint in the JS so you can step through the code and better see where exactly it's breaking/how far the code is getting. I don't know the first thing about webgazer, but you might get somewhere if you can see what's happening when Qualtrics calls this plugin.

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