It's Time to Talk About Signals
summary
Explains that signals are reactive variables, shows a working simple JavaScript demo (button counters, computed sum and parity) and implements a minimal signals system in roughly 30 lines of code with getters setters computed and effect helpers, demonstrates glitch cases and fixes (topological recalculation order, batching, dirty tracking), compares approaches in Knockout/Svelte/Solid/React and points to the TC39 stage one proposal so runtimes and browsers can optimize a standard primitive.
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chapters (9)
- 0:00Introduction
- 1:10What are signals
- 3:57History of web reactivity
- 7:28Framework evolution observables
- 11:03React pull vs signals
- 15:00Live signal implementation
- 23:45How signals work
- 27:35TC39 signals proposal
- 29:20Resources and closing
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