Jsroot not working in chromium

ROOT
1

Dear ROOTers,
I’m using Jsroot to draw histograms. I open them in following way:

var filename = "divided.root";
import {openFile, draw, settings} from '../../../hal_js/modules/main.mjs';
settings.Palette= 50;
let file = await openFile(filename)
let obj = await file.readObject('canvas;1');
draw('drawing', obj,'colz');

Code works with firefox, however in chromium nothing is displayed. The console suggests an error “core.mjs:91 Uncaught TypeError: Cannot read properties of null (reading ‘1’)” in the core.mjs file in line 91 that generates error looks like this:

      browser.chromeVersion = (browser.isChrome || browser.isChromeHeadless) ? parseInt(navigator.userAgent.match(/Chrom(?:e|ium)\/([0-9]+)\.([0-9]+)\.([0-9]+)\.([0-9]+)/)[1]) : 0

Is a bug of jsroot or in my HTML file?
ROOT Version: 6.32.04
Platform: Not Provided
Compiler: Not Provided

2

Hi,

Which chromium version you are using?

Can you try to start browser console (Ctrl + Shift + I) and type there:

navigator.userAgent

For me it is:

'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/134.0.0.0 Safari/537.36'
3

And normally following variable used to detect chromium:

navigator.userAgentData?.brands
navigator.userAgentData?.brands[1]

For me second line gives:

{brand: 'Chromium', version: '134'}
4

Hi,
I solved the problem; when I typed your command, I got 'Mozilla/5.0 (iPhone; CPU iPhone OS 17_7_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/18.3 Mobile/15E148 Safari/604.1' .
I forgot to turn off “Mobile view”. Switching to “PC mode” solved issue.

5

Which mode exactly did you use?
With my chromium browser I cannot reproduce such problem

6

Now I see - when I switch to Apple device (like iPad Air), I can reproduce your problem.

7

Hi,

This is fix for your problem:

I backport it to jsroot 7.7 and 7.8 branches. With some delay it will appear in 6.32 and 6.34 branches of ROOT.

Thanks for reporting it!

1 Like
8

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