A conference talk transcript covering JavaScript signals from first principles. Traces the history of web rendering from server-side pull approaches through jQuery DOM mutation to modern frameworks, explaining why signals emerged as a solution for fine-grained reactive state. Walks through a live implementation of a basic signals system in ~30 lines of JavaScript, covering subscribers, computed values, and effects. Discusses how frameworks like Vue, Svelte, Solid, and Angular adopted signals, why React deliberately avoids them in favor of a pull-based virtual DOM approach with memoization, and the TC39 proposal to standardize signals in the JavaScript language itself.
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