Public class fields - JavaScript | MDN

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This page introduces public instance fields in detail.

[[DefineOwnProperty]]

This page introduces public instance fields in detail.

Object.defineProperty()

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Class fields cannot depend on arguments of the constructor, so field initializers usually evaluate to the same value for each instance (unless the same expression can evaluate to different values each time, such as Math.

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This page was last modified on Jul 8, 2025 by MDN contributors.

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