What do bootstrap classes sm,md,lg,xl mean?

What do bootstrap classes sm,md,lg,xl mean?

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We can use different types of Bootstrap classes in our website. Different classes signifies different device sizes -

  1. sm” - It is used for small-sized devices.
  2. md” - It is used for medium-sized devices.
  3. lg” - It is used for large-sized devices.
  4. xl” - It is used for extra-large devices.