<strike></strike>

[Karellen]

Hello @kovidgoyal,

In the Editors toolbar, one of the text formatting actions is the Strikethrough button.

When using this button, it inserts <strike></strike> and causes EpubCheck to write an Error

Spoiler:

p02c13.xhtml Line: 83 Col: 24 ERROR(RSC-005): Error while parsing file: element "strike" not allowed here; expected the element end-tag, text, element "a", "abbr", "area", "audio", "b", "bdi", "bdo", "br", "button", "canvas", "cite", "code", "data", "datalist", "del", "dfn", "em", "embed", "epub:switch", "i", "iframe", "img", "input", "ins", "kbd", "label", "link", "map", "mark", "meta", "meter", "ns1:math", "ns2:svg", "object", "output", "picture", "progress", "q", "ruby", "s", "samp", "script", "select", "small", "span", "strong", "sub", "sup", "template", "textarea", "time", "u", "var", "video" or "wbr" (with xmlns:ns1="http://www.w3.org/1998/Math/MathML" xmlns:ns2="http://www.w3.org/2000/svg") or an element from another namespace

Apparently this is deprecated and we should use <s></s> instead
Is this an oversight?

https://developer.mozilla.org/en-US/...Element/strike

Thanks

[kovidgoyal]

https://github.com/kovidgoyal/calibr...e3a9c8fdecff17

[Karellen]

That was a simple fix

Thank you @kovidgoyal

[Capricorn]

When I use <strike>, the epubcheck plugin gives an error, just like you did.
However, when I use the <s>, the epubcheck plugin gives exactly the same error.
Then, when I try <del>, everything is fine for the epubcheck plugin.

Reading the mozilla reference you gave, I read this under the heading "warning":

If semantically appropriate, i.e., if it represents deleted content, use <del> instead. In all other cases use <s>.

Huh? I am very confused about this statement. According to the epubcheck <del> is correct, not <strike>, not <s>.

I would appreciate it, if someone could clarify this in some way that I can understand.

Thanks,

[kovidgoyal]

epubcheck is wrong, ignore it. In general my advice is to always ignore epubcheck. The errors it finds are largely useless at best and misleading at worst. The few non-useless functions it does are done better by the check book tool.

[Tex2002ans]

Originally Posted by Capricorn

Reading the mozilla reference you gave, I read this under the heading "warning":

If semantically appropriate, i.e., if it represents deleted content, use <del> instead. In all other cases use <s>.

Huh? I am very confused about this statement. According to the epubcheck <del> is correct, not <strike>, not <s>.

I would appreciate it, if someone could clarify this in some way that I can understand.

You can visit the other MDN pages for those explanations:

• MDN: "<s>"
  
  • HTML5 WhatWG Specs: "<s>"
• MDN: "<del>"
• MDN: "<ins>"

<strike> was deprecated in HTML4. (For a straight replacement, better to use <s>.)

For <s>, it's probably not that good to use it... but, it stands for:

contents that are no longer accurate or no longer relevant.

Note: The s element is not appropriate when indicating document edits; to mark a span of text as having been removed from a document, use the del element.

- - -

Side Note: You can easily also get strikethrough by applying CSS:

.striketext {
  text-decoration: line-through;
}

- - -

Also, according to MDN, <s>:

[...] is not appropriate when indicating document edits; for that, use the <del> and <ins> elements, as appropriate.

So, if you're actually showing DELETED or INSERTED text—like in tracked changes—then...

Use <del> + <ins> instead:

The <del> HTML element represents a range of text that has been deleted from a document. This can be used when rendering "track changes" or source code diff information, for example. The <ins> element can be used for the opposite purpose: to indicate text that has been added to the document.

Long story short:

In normal books, you'll probably only ever need to use <s> (or the simple CSS above).

If you are working with some sort of coding book, editing book, or dealing with "tracked changes", then perhaps you may need <ins> + <del>.

[Quoth]

In fact if you use a wordprocessor and automatic conversion you only get a style pointing to CSS, either in <p class="something"> or <span class="something">

.something {
text-decoration: line-through;
}


You never get <s>, <strike> or <del>

And I agree, that only specialist systems, not real ebooks will ever use <del> or <ins>

I've never actually seen those two in over 25 years of editing HTML and nearly 10 years of making ebooks.