10/31/2023 0 Comments Mdn javascript versions![]() The following regex syntaxes are deprecated and only available in Unicode-unaware mode. Warning: Avoid using these static properties, as they can cause issues when interacting with external code! Some others, albeit in the main spec body, are also marked as normative optional and should not be depended on. … Programmers should not use or assume the existence of these features and behaviors when writing new ECMAScript code. … All of the language features and behaviors specified in this annex have one or more undesirable characteristics and in the absence of legacy usage would be removed from this specification. Familiarity with the core HTML, CSS, and JavaScript languages. (JavaScript has the design goal of "don't break the web".) Still, they are not cross-platform portable and may not be supported by all analysis tools, so you are advised to not use them, as the introduction of Annex B states: In this article, well look at package managers in some detail to understand how we can use them in our own projects to install project tool dependencies, keep them up-to-date, and more. These features are likely stable because removing them will cause backward compatibility issues and break legacy websites. This section is described as normative optional - that is, web browser hosts must implement these features, while non-web hosts may not. Some of these deprecated features are listed in the Annex B section of the ECMAScript specification. You should work to remove their use from your code. These deprecated features can still be used, but should be used with caution because they are not required to be implemented by every JavaScript engine.
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