What we talk about when we talk about the JavaScript object model
summary
Pins down the actual engine: every property has a descriptor with keys value, writable, enumerable and configurable so data properties differ from accessor properties (they use get/set instead of value/writable). Demonstrates using Object.getOwnPropertyDescriptor, shows Object.seal sets configurable false, Object.freeze also sets writable false and warns getters aren’t truly frozen and nested objects must be frozen separately. Recommends preferring the Reflect API and links a MDN comparison for exact method differences.
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chapters (7)
- 0:00Introduction
- 3:37Property descriptors
- 8:24Getters setters
- 15:31enumerable and configurable
- 18:15objectseal
- 19:07objectfreeze
- 21:01enumerable
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