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Re: Element ids as global names

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  Re: Element ids as global names Mickey Finn <mfinney@gmail.com> - 2019-02-08 22:19 -0200

#36000 — Re: Element ids as global names

Stefan Ram wrote:
>    When one has an element
> 
> <em id=a>abc</em>
> 
>    and then evaluates »a« in JavaScript, that element is yielded.

It may happen with HTML elements having a name attribute too. This 
feature is called "Named access on the Window object" and is 
standardised in HTML5 [1][2], although it is non-normative.

> 
>    Which of the following lines is the best expression for this element
>    (from the point of view of programming style and maintainability)?
> 
> this.document.getElementById( 'a' )
> window.document.getElementById( 'a' )
> document.getElementById( 'a' )
> a
> (or something else, I have not listed above?)

Use document.getElementById() or document.querySelector(). Why 
complicate things?


> 
>    Is the feature to make the HTML ids become global names in
>    JavaScript deprecated (obsolete) or expected to become
>    deprecated (obsolencent)?
> 
> 

See the answer in the links below.

[1] 
<https://html.spec.whatwg.org/multipage/window-object.html#named-access-on-the-window-object>
[2] <https://www.w3.org/TR/2011/WD-html5-20110525/browsers.html>

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