Objects and Object Constructors: Improve clarity of prototype explanations #30437
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Existing explanation was incorrect - `.[[Prototype]]` is not valid JS syntax. `[[Prototype]]` is just another way to refer to the internal prototype in text. Link text label made sufficiently accessible on its own.
Common syntax in docs and clearer distinction from `Function.prototype.prototype`
Very common confusion that .prototype is for accessing [[Prototype]]
mao-sz
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Nov 18, 2025
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| 1. [JavaScript Tutorial's article on the `this` keyword](https://www.javascripttutorial.net/javascript-this/) covers how `this` changes in various situations. Pay special attention to the pitfalls mentioned in each section. | ||
| 1. You might have noticed us using the `this` keyword in object constructors and prototype methods in the examples above. [JavaScript Tutorial's article on the `this` keyword](https://www.javascripttutorial.net/javascript-this/) covers how `this` changes in various situations. Pay special attention to the pitfalls mentioned in each section. | ||
| 1. Read the article [`[[Prototype]]` vs `__proto__` vs `.prototype` in JavaScript](https://medium.com/@eamonocallaghan/prototype-vs-proto-vs-prototype-in-javascript-6758cadcbae8) |
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Reading through this assignment (https://medium.com/@eamonocallaghan/prototype-vs-proto-vs-prototype-in-javascript-6758cadcbae8) and accounting for the content changes in this PR, I'm wondering if this assignment is needed? I feel like it can be dropped alongside the other changes.
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Because
Superseding #29465 due to inactivity.
The topic of constructors and prototypes is a common pain point amongst learners. The most common confusions are the differences between
[[Prototype]],.prototypeand.__proto__and similar, as well as exactly what the lesson is referring to when it just uses the wordprototype.There was also a section with incorrect info (
.[[Prototype]]is not valid JS -[[Prototype]]has a different use).This PR
[[Prototype]][[Prototype]]syntax instead of justprototypespecifically when the lesson is referring to an object's internal prototype.Object.getPrototypeOf()and.prototypeIssue
Closes #28633
Additional Information
Pull Request Requirements
location of change: brief description of changeformat, e.g.Intro to HTML and CSS lesson: Fix link textBecausesection summarizes the reason for this PRThis PRsection has a bullet point list describing the changes in this PRIssuesection