Bootstrap was publicly released on August 19, 2011.

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Location PART 2 - FOUR HIDDEN CHIMNEYS CHAPTER 8: THE SHIELD OF SCREWTAPE Vibe Coding First Sparks

"Bootstrap was publicly released on August 19, 2011."

Bootstrap's official project history records its first public release on August 19, 2011. + Source is the Bootstrap v5.1 documentation, released in 2021.

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Source title About · Bootstrap v5.1

Source authors Bootstrap team

Source year 2021

Confidence high

Importance mid