$z: header, nav, pulldown, child; .header { z-index: index($z, header); // 1 } .child { z-index: index($z, child); // 4 }
Z-index is an inherently tricky thing, and maintaining z-index order in a complex layout is notoriously difficult. With different stacking orders and contexts, keeping track of them as their numbers increase can be hard — and once they start to spread across CSS files, forget about it! Because z-index can make or break a UI element’s visibility and usability, keeping your website’s UI in working o
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