How do I detect microsoft edge, firefox, and other browsers

Online experiments
1

Hello everyone. I am using this script for detecting OS and browsers that was created in a prior post:

var sUsrAg
var nIdx
getBrowserId = function() {
var browsers = [“MSIE”, “Firefox”, “Safari”, “Chrome”, “Opera”];
sUsrAg = window.navigator.userAgent,
nIdx = browsers.length - 1;
for (nIdx; nIdx > -1 && sUsrAg.indexOf(browsers [nIdx]) === -1; nIdx–);

return browsers[nIdx];
}
psychoJS.experiment.addData(“OS”, window.navigator.platform)
psychoJS.experiment.addData(“Browser”, getBrowserId())

This script works when run in Chrome, but when I use it in Microsoft edge or Firefox, I get get errors during the initialization of the experiment. Firefox says: Uncaught ReferenceError: assignment to undeclared variable getBrowserId and Edge says the ‘viewport’ meta element ‘content’ attribute value should not contain ‘user-scalable’.

I am hoping someone with a better knowledge of psychojs could help me figure out how to adjust this code to detect a wider variety of browsers.

2

A simple but inelegant solution would be to just have this:

psychoJS.experiment.addData(“OS”, window.navigator.platform)
psychoJS.experiment.addData(“Browser”, window.navigator.userAgent)

It isn’t ideal in that your data file will get the full userAgent header, which includes more information than you strictly need, but I personally find it easier to process stuff like that in Excel then try to bully JavaScript into parsing it for me.

1 Like
3

Are you using jsPsych or PsychoJS (via the PsychoPy Builder interface)? If it’s the latter I’ll change the category of your thread.

4

PsychoJS. Sorry about that.

5

Thanks so much for the responses. Just letting everyone know that I essentially solved my problem by integrating Qualtrics into my experiment since it is able to detect the browser and OS.