sidenav sibling error - code helper

sidenav sibling error /by elmajed2007

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Default Moto G4 Galaxy S5 Pixel 2 Pixel 2 XL iPhone 5/SE iPhone 6/7/8 iPhone 6/7/8 Plus iPhone X iPad iPad Pro Surface Duo Galaxy Fold

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HTML

<nav id="sidenav-1"

CSS

JS

Console errors: 0