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Add safePrintableInset parameter for printing. #1950

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Add safePrintableInset parameter for printing. #1950

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Add safePrintableInset parameter for printing.
mstensho Feb 25, 2026
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mstensho Feb 27, 2026
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mstensho Apr 7, 2026
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15 changes: 15 additions & 0 deletions index.html
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Expand Up @@ -11313,6 +11313,13 @@ <h3><dfn>Print Page</dfn></h3>
<li><p>If <var>shrinkToFit</var> is not a <a>Boolean</a>
return <a>error</a> with <a>error code</a> <a>invalid argument</a>.

<li><p>Let <var>safePrintableInset</var> be the result of <a>getting a
property with default</a> named "<code>safePrintableInset</code>" and with
default <code>0</code> from <var>parameters</var>.
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<li><p>If <var>safePrintableInset</var> is not a <a>Number</a>, or is less than 0,
return <a>error</a> with <a>error code</a> <a>invalid argument</a>.

<li><p>Let <var>pageRanges</var> be the result of <a>getting a
property with default</a> named "<code>pageRanges</code>" from
<var>parameters</var> with default of an
Expand Down Expand Up @@ -11364,6 +11371,14 @@ <h3><dfn>Print Page</dfn></h3>
page width specified in the content
</dl>

<p>The value of <var>safePrintableInset</var> defines the minimum inset along
each page edge needed to steer clear of the area that the printer is potentially
incapable of marking reliably. Most printers have a small region along each
edge of the page sheet which is unprintable, typically due to the printer's
paper handling mechanism. The document that is being printed may have
<a href="https://drafts.csswg.org/css-page-3/#page-margin-safety">CSS rules</a>
to adjust page margins based on this.

<li><p>If <var>pageRanges</var> is not an empty <a>Array</a>,
Let <var>pages</var> be the result of <a>trying</a> to <a>parse a
page range</a> with arguments <var>pageRanges</var> and the number of
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