Did you know that window.innerWidth may or may not include the width of the vertical scrollbar in certain versions of Firefox? To learn more about this, check out the following resources:
Mozilla Developer Network
Interestingly, there is some disagreement on whether the scrollbar width is included in window.innerWidth, as mentioned by W3Schools.
If you're interested in diving deeper into this topic, you can also explore the related bug reported in the Mozilla bug tracker: Mozilla Bug Tracker
To address this confusion, CSS3 introduces a specific property called box-sizing, which helps in calculating widths accurately. By setting box-sizing to 'border-box', you can ensure that padding and border are included within the specified width and height parameters.
For those using jQuery to retrieve window width, consider utilizing jQuery's width() method for accurate measurements.