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Re: document.open

Started by	Joao Rodrigues <groups_jr-1@yahoo.com.br>
First post	2016-01-01 13:24 -0200
Last post	2016-01-01 13:24 -0200
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  Re: document.open Joao Rodrigues <groups_jr-1@yahoo.com.br> - 2016-01-01 13:24 -0200

#29090 — Re: document.open

From	Joao Rodrigues <groups_jr-1@yahoo.com.br>
Date	2016-01-01 13:24 -0200
Subject	Re: document.open
Message-ID	<n665o3$859$1@speranza.aioe.org>

On 01/01/2016 12:18 PM, Stefan Ram wrote:
>    The MDN documentation for »document.open« shows it with no
>    arguments:
>
> document.open()

I think that was the old DOM Level 2 HTML Specification for the open() 
method of the HTMLDocument interface:
<http://www.w3.org/TR/DOM-Level-2-HTML/html.html#ID-72161170>

>
>    . But some other web pages give optional arguments:
>
> document.open( MIMEtype, replace )

That is according to the HTML5 specification:

document = document.open( [ type [, replace ] ] )

For more details, see there:
<http://www.w3.org/TR/html5/webappapis.html#dom-document-open>


>
>    . But this does not seem to work with Mozilla Firefox 38.
>    OTOH, it does also not simply ignore the first argument.
>
>    Inserting the following code into the JavaScript console
>    of Mozilla Firefox 38 shows the page as intended. Note the
>    MIME type »text/html«:
>
> document.open( "text/html", "replace" );
> document.writeln
> ( '<!DOCTYPE HTML>'+
>    '<html lang="en">\r\n'+
>    '<head><meta charset="UTF-8"><title>Main</title><head><style type="text/css">\r\n'+
>    '</style></head></head><body>\r\n'+
>    '    <p>hello, world</p>\r\n'+
>    '<pre><code><script type="application/javascript;version=1.8">\r\n'+
>    '</script></code></pre></body></html>\r\n' );
> document.close();
>
>    . But when the MIME type is changed into »application/xhtml+xml«,
>    the document is not rendered as intended:
>
> document.open( "application/xhtml+xml", "replace" );
> document.writeln
> ( '<!DOCTYPE HTML>'+
>    '<html xmlns="http://www.w3.org/1999/xhtml" lang="en" xml:lang="en">\r\n'+
>    '<head><meta charset="UTF-8"><title>Main</title><head><style type="text/css">\r\n'+
>    '</style></head></head><body>\r\n'+
>    '    <p>hello, world</p>\r\n'+
>    '<pre><code><script type="application/javascript;version=1.8">/*<![CDATA[*/\r\n'+
>    '/*]]>*/</script></code></pre></body></html>\r\n' );
> document.close();
>
>    . (This is intended to be a polyglot HTML5 document.)
>
>    Instead, it here shows the source code, which is the
>    argument of the »writeln« in the browser.
>

document = document . open( [ type [, replace ] ] )

"If the type argument is omitted or has the value "text/html", then the 
resulting Document has an HTML parser associated with it, which can be 
given data to parse using document.write(). Otherwise, all content 
passed to document.write() will be parsed as plain text".
<http://www.w3.org/TR/html5/webappapis.html#dom-document-open>

See the steps for the write() and writeln() methods too:
<http://www.w3.org/TR/html5/webappapis.html#dom-document-write>

-- 
Joao Rodrigues

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#29090 — Re: document.open