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vue/packages/@core/composables/src/use-is-mobile.ts

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+import { breakpointsTailwind, useBreakpoints } from '@vueuse/core';
+
+export function useIsMobile() {
+  const breakpoints = useBreakpoints(breakpointsTailwind);
+  const isMobile = breakpoints.smaller('md');
+  return { isMobile };
+}