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From: Thomas 'PointedEars' Lahn <PointedEars@web.de>
Newsgroups: comp.lang.javascript
Subject: Re: simple error
Date: Sun, 28 Dec 2014 21:44:06 +0100
Organization: PointedEars Software (PES)
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Jukka K. Korpela wrote:

> 2014-12-28, 21:13, Lahn wrote:
>>> (`) might also work (it does in my firefox at least).
>> If so, only because of error correction.
>>
>> <http://www.w3.org/TR/2014/REC-html5-20141028/syntax.html#before->> attribute-value-state>
> 
> Of course, it has nothing to do with HTML error correction. Anyone who
> actually understands the elements of the basics of the fundamentals of
> HTML parsing, instead of showing off and making pointless “learned”
> lectures, knows that.

The HTML5 parsing algorithm at least, which I cited, states that if a 
backtick (`) is parsed at this position, it constitutes a “Parse error”, 
that should be treated like “Anything else”, therefore “append[ed] […] to 
the current attribute’s value”.  This means it would become part of the 
attribute value.

An event-handler attribute value is parsed (per the definition of the 
default scripting language) as an ECMAScript /Program/.  But a backtick as 
first character of an ECMAScript /Program/ is a syntax error in ECMAScript 
implementations because it cannot be produced by production

| Program : SourceElements_opt

(assuming no syntax extensions).  Therefore, error correction would be 
necessary to execute that /Program/.

<http://ecma-international.org/ecma-262/5.1/#sec-14>

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