Modal when scrolled on the DOM, the ::before doesn't get to the top, it appears with a space equal to the amount of pixels I scrolled.

UNCONFIRMED
Unassigned

Status

()

Core
DOM: CSS Object Model
P3
normal
UNCONFIRMED
10 months ago
8 months ago

People

(Reporter: Jose, Unassigned)

Tracking

54 Branch
Points:
---

Firefox Tracking Flags

(firefox57 wontfix)

Details

Attachments

(1 attachment)

(Reporter)

Description

10 months ago
Created attachment 8891995 [details]
Example of the issue

User Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:54.0) Gecko/20100101 Firefox/54.0
Build ID: 20170628075643

Steps to reproduce:

1) Go to https://www.farfetch.com/uk/shopping/women/frame-denim-split-hem-jeans-item-12207284.aspx?storeid=9845
2) Open the Console and place the following to set a cookie:
document.cookie = "toggle_slice=pdpslice";
3)Refresh the page
4)Scroll down
5) Click in the link Size Guide next to the price section





Actual results:

There is modal, with { position: fixed }  what has a background with ::before: {position fixed; top: 0; }
The issue is: When I open that modal when I scroll on the DOM, the ::before doesn't get to the top, it appears with a space equal to the amount of pixels I scrolled.


Expected results:

The background ( ::before) should fill all the page (also the part of the page that I have scrolled)
This doesn't look like a security issue, so I'm unhiding it.
Group: core-security

Updated

9 months ago
Priority: -- → P3

Comment 2

8 months ago
The size guide appears to function correctly for me on the latest Firefox Nightly. Does this still occur for you?
Flags: needinfo?(jose.goncalves)
(Reporter)

Comment 3

8 months ago
Hi Jet! I updated the Firefox version to 55.0.3 (32-bit , but the issue still occurs.
Flags: needinfo?(jose.goncalves)

Updated

8 months ago
status-firefox57: --- → wontfix
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