Why do mismatched link and anchor work?

Abull · 06-12-2014, 11:50 PM

In an epub I created some numbered target IDs didn't quite match the links on the contents page because I either mistyped a digit twice or left off one of a repeated digit. However the lnks worked as intended in Calibre's editor and weren't identified as an error when I ran the check. The same thing happens in Sigil. I only dicovered the error in EPUB-Checker.

The links also work in both versions of desktop ADE, but not in FBreader.

But shouldn't Calibre editor catch them as an error anyway?

kovidgoyal · 06-13-2014, 12:01 AM

Attach a sample demonstrating the issue.

Abull · 06-13-2014, 12:31 AM

Here it is.

kovidgoyal · 06-13-2014, 01:00 AM

The editor does not currently check fragments (the part of the link after the #). As for the links working, when you click a link with an incorrect fragment, most viewers will simply take you to the top of the file linked to an ignore the incorrect fragment, that will give you the illusion of the link working, if the link destination is near the top of the file.

I will look into adding a check for fragments as well.

06-12-2014, 11:50 PM	#1
Abull Member Posts: 19 Karma: 10 Join Date: Jan 2013 Device: none	Why do mismatched link and anchor work? In an epub I created some numbered target IDs didn't quite match the links on the contents page because I either mistyped a digit twice or left off one of a repeated digit. However the lnks worked as intended in Calibre's editor and weren't identified as an error when I ran the check. The same thing happens in Sigil. I only dicovered the error in EPUB-Checker. The links also work in both versions of desktop ADE, but not in FBreader. But shouldn't Calibre editor catch them as an error anyway?

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06-13-2014, 12:01 AM	#2
kovidgoyal creator of calibre Posts: 43,864 Karma: 22666666 Join Date: Oct 2006 Location: Mumbai, India Device: Various	Attach a sample demonstrating the issue.

06-13-2014, 01:00 AM	#4
kovidgoyal creator of calibre Posts: 43,864 Karma: 22666666 Join Date: Oct 2006 Location: Mumbai, India Device: Various	The editor does not currently check fragments (the part of the link after the #). As for the links working, when you click a link with an incorrect fragment, most viewers will simply take you to the top of the file linked to an ignore the incorrect fragment, that will give you the illusion of the link working, if the link destination is near the top of the file. I will look into adding a check for fragments as well.

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