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// Get all elements with the .bg-red class
var elemsRed = document.querySelectorAll('.bg-red');

// Get all elements with the [data-snack] attribute
var elemsSnacks = document.querySelectorAll('[data-snack]');

https://vanillajstoolkit.com/reference/selectors/document-queryselectorall/

https://vanillajstoolkit.com/reference/selectors/document-queryselectorall/