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Images don't present consecutively in jspsych-animation (for firefox only)

See original GitHub issue

I was trying to present 60 images as an animation, I found the plugin jspsych-animation doing exactly that (thank you so much). I want all 60 images to present one after another without breaks in between, so I set frame_isi to be 0. When running the script in Chrome, the animation presents without breaks between images, but when running in Firefox, the animation ‘blinks’ so much and it seems that there is an isi after each image.

Issue Analytics

State:
Created 3 years ago
Comments:8 (1 by maintainers)

Top GitHub Comments

1reaction

jodeleeuwcommented, Jul 20, 2020

We’ll need to investigate this further to figure out if preloading behavior has changed in recent browser updates. I’ll add it to one of our milestones. Thanks for flagging this issue.

0reactions

becky-gilbertcommented, Oct 30, 2020

I think I was able to reproduce this. Here’s the cognition.run demo: https://elivpqnmqw.cognition.run

In Firefox, according to the network tab, the images are preloaded/cached successfully when the page loads, and not requested again when the animation starts. But still I do see some flashing between images during the first run through the image sequence, then the animation runs smoothly after that. So the behavior seems consistent with the images not preloading, but the network tab says that they are…

Can someone else check this out in Firefox and let me know if they’re seeing the same thing, please?