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Bootstrap 4 Cheat Sheet
A web-based interactive cheat sheet designed for developers working with Bootstrap 4
verified Jul 12, 2026 · HTTP 200
CohortClass of 2016What it is
A web-based interactive cheat sheet designed for developers working with Bootstrap 4. Provides quick access to components, utilities, and syntax for the popular CSS framework. Streamlines front-end development workflow with organized Bootstrap 4 documentation.
HTTP liveness
9 probes since Jun 16Jun 16Jul 12
AliveHard-dead (404/5xx/parked)RedirectedUnverified (timeout/DNS/block)
Observed events
probes · press · GitHub- Jun 16, 2026First probe — liveAlive · 200 OK
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Pulse Indexobserved activity
422/4 signal families
Liveness40%1.00
Press30%no data
GitHub20%no data
Tranco10%0.19
Weighted observed activity · updated Jul 15
Cohort survival · Class of 2016weekly
13,657 products launched in 2016 · 100% still active
13,633 active24 sunset
Still active
100%
Median lifespan
4.9y