JS Apps
summary
Facebook describes a component library called React that enforces one directional data flow and minimizes developer mutation by re-rendering declarative components and applying a smallest diff to the DOM via a virtual DOM reconciliation step JSX appears as a lightweight transform JSX and supports server side markup plus client instantiation Instagram reimplements profiles with it in weeks several Facebook features migrate to it plug ins integrate through explicit escape hatches and the team open sources the project after internal rollout and performance tuning
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