content Add prose and meta-docs for [LegacyNullToEmptyString]

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Description

This PR adds relevant information to existing MDN pages about properties or method parameters prefixed with the WebIDL [LegacyNullToEmptyString].

Motivation

This is part of openwebdocs/project#159 where we want to uniformize and add more information stored in WebIDLs files. Standardizing them makes them easier to understand and MDN Web docs articles more precise.

Additional details

What does this extended attribute mean?

This extended attribute alters how null values are converted to a string. The standard way is to convert null to the string "null". When this extended attribute is present, the null object is converted to an empty string ("").

What does this PR do?

It adds to all relevant properties a sentence explaining the set behaviour when set to the null value, with a tiny inline example.
It adds to all such parameters a sentence explaining what the behaviour is when null is passed.
Update the meta-docs, listing the standardized sentences.

Related issues and pull requests

None.

Jul 27 '23 10:07 teoli2003

Preview URLs (21 pages)

Flaws (1)

Note! 20 documents with no flaws that don't need to be listed. 🎉

URL: /en-US/docs/MDN/Writing_guidelines/Page_structures/Page_types/API_property_subpage_template Title: API property subpage template Flaw count: 1

broken_links:
- Can't resolve /en-US/docs/MDN/Writing_guidelines/Howto/Write_an_API_reference/Information_contained_in_a_WebIDL_file#type_of_the_property

(comment last updated: 2024-07-12 01:42:10)