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minor fixes

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Ilya Kantor 2022-04-15 08:11:09 +03:00
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1-js/04-object-basics/08-symbol/article.md
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@ -44,6 +44,8 @@ alert(id1 == id2); // false
If you are familiar with Ruby or another language that also has some sort of "symbols" -- please don't be misguided. JavaScript symbols are different.
To summarize, symbols are "special unique values" with optional description. Let's see where we can use them.
````warn header="Symbols don't auto-convert to a string"
Most values in JavaScript support implicit conversion to a string. For instance, we can `alert` almost any value, and it will work. Symbols are special. They don't auto-convert.
@ -80,6 +82,7 @@ alert(id.description); // id
## "Hidden" properties
Symbols allow us to create "hidden" properties of an object, that no other part of code can accidentally access or overwrite.
For instance, if we're working with `user` objects, that belong to a third-party code. We'd like to add identifiers to them.