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Add deprecation notice for document.writeln
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Description

Similar to T108139: document.writeln can also blank the page.

Please also add a polyfill with a deprecation warning. Thanks.

Hint: The writeln method accept more than one argument.

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Umherirrender raised the priority of this task from to Needs Triage.
Umherirrender updated the task description. (Show Details)
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Schnark added a subscriber: Schnark.Aug 7 2015, 8:45 AM

The writeln method accept more than one argument.

According to http://www.w3.org/TR/2000/WD-DOM-Level-2-HTML-20001113/html.html#ID-75233634 both write and writeln accept only one parameter, though it seems that all browsers accept more parameters and just concatenate them.

I have looked at http://www.w3schools.com/jsref/met_doc_writeln.asp where it is marked as var_args ("Multiple arguments can be listed and they will be appended to the document in order of occurrence"), but that may not the standard.

T108423 is a duplicate, but since the other ticket has an already merged patch, let's merge this task in rather than the other way round.