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12 changes: 11 additions & 1 deletion packages/core/src/util/browser.ts
Original file line number Diff line number Diff line change
Expand Up @@ -13,7 +13,17 @@ export function formatKeyboardShortcut(shortcut: string, ctrlText = "Ctrl") {
}

export function mergeCSSClasses(...classes: (string | false | undefined)[]) {
return classes.filter((c) => c).join(" ");
return [
// Converts to & from set to remove duplicates.
...new Set(
classes
.filter((c) => c)
// Ensures that if multiple classes are passed as a single string, they
// are split.
.join(" ")
.split(" "),
),
].join(" ");
}

export const isSafari = () =>
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