On window resize with slider previous partial slide disappears until you scroll interact with the slider.

[houtaiwong-toast]

Check that this is really a bug

• I confirm

Reproduction link

https://codesandbox.io/p/sandbox/swiper-infinite-loop-forked-wqfvh4?file=%2Findex.html%3A92%2C36&layout=%257B%2522sidebarPanel%2522%253A%2522EXPLORER%2522%252C%2522rootPanelGroup%2522%253A%257B%2522direction%2522%253A%2522horizontal%2522%252C%2522contentType%2522%253A%2522UNKNOWN%2522%252C%2522type%2522%253A%2522PANEL_GROUP%2522%252C%2522id%2522%253A%2522ROOT_LAYOUT%2522%252C%2522panels%2522%253A%255B%257B%2522type%2522%253A%2522PANEL_GROUP%2522%252C%2522contentType%2522%253A%2522UNKNOWN%2522%252C%2522direction%2522%253A%2522vertical%2522%252C%2522id%2522%253A%2522cltrl0f6r00063b6gafl7ybsb%2522%252C%2522sizes%2522%253A%255B100%252C0%255D%252C%2522panels%2522%253A%255B%257B%2522type%2522%253A%2522PANEL_GROUP%2522%252C%2522contentType%2522%253A%2522EDITOR%2522%252C%2522direction%2522%253A%2522horizontal%2522%252C%2522id%2522%253A%2522EDITOR%2522%252C%2522panels%2522%253A%255B%257B%2522type%2522%253A%2522PANEL%2522%252C%2522contentType%2522%253A%2522EDITOR%2522%252C%2522id%2522%253A%2522cltrl0f6q00023b6ga7vhlxef%2522%257D%255D%257D%252C%257B%2522type%2522%253A%2522PANEL_GROUP%2522%252C%2522contentType%2522%253A%2522SHELLS%2522%252C%2522direction%2522%253A%2522horizontal%2522%252C%2522id%2522%253A%2522SHELLS%2522%252C%2522panels%2522%253A%255B%257B%2522type%2522%253A%2522PANEL%2522%252C%2522contentType%2522%253A%2522SHELLS%2522%252C%2522id%2522%253A%2522cltrl0f6q00033b6gthif8mmj%2522%257D%255D%252C%2522sizes%2522%253A%255B100%255D%257D%255D%257D%252C%257B%2522type%2522%253A%2522PANEL_GROUP%2522%252C%2522contentType%2522%253A%2522DEVTOOLS%2522%252C%2522direction%2522%253A%2522vertical%2522%252C%2522id%2522%253A%2522DEVTOOLS%2522%252C%2522panels%2522%253A%255B%257B%2522type%2522%253A%2522PANEL%2522%252C%2522contentType%2522%253A%2522DEVTOOLS%2522%252C%2522id%2522%253A%2522cltrl0f6q00053b6gdlpsw20p%2522%257D%255D%252C%2522sizes%2522%253A%255B100%255D%257D%255D%252C%2522sizes%2522%253A%255B40%252C60%255D%257D%252C%2522tabbedPanels%2522%253A%257B%2522cltrl0f6q00023b6ga7vhlxef%2522%253A%257B%2522tabs%2522%253A%255B%257B%2522id%2522%253A%2522cltrl0f6q00013b6gp87ahazc%2522%252C%2522mode%2522%253A%2522permanent%2522%252C%2522type%2522%253A%2522FILE%2522%252C%2522filepath%2522%253A%2522%252Findex.html%2522%252C%2522state%2522%253A%2522IDLE%2522%252C%2522initialSelections%2522%253A%255B%257B%2522startLineNumber%2522%253A92%252C%2522startColumn%2522%253A36%252C%2522endLineNumber%2522%253A92%252C%2522endColumn%2522%253A36%257D%255D%257D%255D%252C%2522id%2522%253A%2522cltrl0f6q00023b6ga7vhlxef%2522%252C%2522activeTabId%2522%253A%2522cltrl0f6q00013b6gp87ahazc%2522%257D%252C%2522cltrl0f6q00053b6gdlpsw20p%2522%253A%257B%2522tabs%2522%253A%255B%257B%2522id%2522%253A%2522cltrl0f6q00043b6gzi0evcsx%2522%252C%2522mode%2522%253A%2522permanent%2522%252C%2522type%2522%253A%2522UNASSIGNED_PORT%2522%252C%2522port%2522%253A0%252C%2522path%2522%253A%2522%252F%2522%257D%255D%252C%2522id%2522%253A%2522cltrl0f6q00053b6gdlpsw20p%2522%252C%2522activeTabId%2522%253A%2522cltrl0f6q00043b6gzi0evcsx%2522%257D%252C%2522cltrl0f6q00033b6gthif8mmj%2522%253A%257B%2522tabs%2522%253A%255B%255D%252C%2522id%2522%253A%2522cltrl0f6q00033b6gthif8mmj%2522%257D%257D%252C%2522showDevtools%2522%253Atrue%252C%2522showShells%2522%253Afalse%252C%2522showSidebar%2522%253Atrue%252C%2522sidebarPanelSize%2522%253A15%257D

Bug description

When slidesPerView is something other than a whole number (i.e 1.25) and centeredSlides is true. On window resize the previous partial slide does not show up until I interact with the slider. I've added a gif of the reproduction of this issue.

Expected Behavior

I expect the partial slides to always show .25 of the next and previous slides.

Actual Behavior

The previous partial slide disappear on window resize.

Swiper version

11.0.7

Platform/Target and Browser Versions

MacOS Chrome 122

Validations

• Follow our Code of Conduct
• Read the docs.
• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.
• Make sure this is a Swiper issue and not a framework-specific issue

Would you like to open a PR for this bug?

• I'm willing to open a PR

[houtaiwong-toast]

Want to add some more color here. This only happens when the amount of slides is less than or equal to 4. I've also tried to add the property loopAdditionalSlides to the the amount equal to the slides I have. Which fixes the resize, but on init the next slide does not partially show.

[alicarbon]

I'm having the same issue

[nolimits4web]

This is how loop mode works.

• increase amount of slides (you can just duplicate existing ones)
• try to use slidesPerView: 'auto' instead