Signals, which is used by front-end frameworks, has a standardization proposal

In the field of front-end development, state management is always an unavoidable topic. As web applications become more complex, the demand for efficient and reliable state management solutions is also increasing. In 2022, a new concept emerged in the JavaScriptworld: Signals, which was once hyped as the future of front-end state management.

Recently, Rob Eisenbergand Daniel Ehrenbergofficially released the TC39standardization draft of Signals, which is currently in the Stage 0stage, and also launched the polyfillthat conforms to the specification.

Why do we need Signals?

Signalsis a reactive state management mechanism for JavaScriptapplications, designed to simplify and optimize the reactive update capability of data. Signalsitself is like a data container. When the data it stores changes, the calculation functions or side effects that depend on this Signalcan be automatically updated.

Each Signalcan be seen as a source of values. When this value changes, the Signalensures that all states (and possibly other Signals) that depend on it are notified and updated accordingly, forming a dependency graph. The state management method under this mechanism is clear because the flow of data is single-item and traceable.