Why does the font CSS property cancel the bold font weight?
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P粉662802882 2023-08-27 23:37:21
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<p>I've been asked to remove unnecessary tags from a computer-generated HTML that has a lot of useless tags in it (I just want to keep the color/strong/em information). I came across something similar to the following HTML: </p> <pre class="brush:html;toolbar:false;"><b> <span style="FONT: 20pt &quot;Arial&quot;"> <strong>bold</strong> not bold <b>bold</b> not bold </span> </b> </pre> <p>For me (on chrome and firefox) it displays <code>bold</code> text as bold and <code>not bold</code> text as non-bold , I'm confused about this. In particular, this made my task more complicated: I thought I could just remove the tags without color/strong/em information, so changed it to the following: </p> <pre class="brush:html;toolbar:false;"><b> <strong>bold</strong> not bold <strong>bold</strong> not bold </b> </pre> <p>But now, all the text is bold instead of how it was before.</p> <p>I'm trying to figure out what I can put in the <code>FONT</code> style to reproduce this behavior: </p> <p>Replacing <code>Arial</code> with <code>foo</code> maintains this behavior: </p> <pre class="brush:html;toolbar:false;"><b> <span style="FONT: 20pt foo"> <strong>bold</strong> not bold <b>bold</b> not bold <!-- not bold is actually not bold! 20pt is applied --> </span> </b> </pre> <p>After switching the size and font, the behavior changed: </p> <pre class="brush:html;toolbar:false;"><b> <span style="FONT: &quot;Arial&quot; 20pt"> <strong>bold</strong> not bold <b>bold</b> not bold <!-- everything is bold. 20pt is _not_ applied --> </span> </b> </pre> <p>Neither of the two values ​​has any effect: </p> <pre class="brush:html;toolbar:false;"><b> <span style="FONT: &quot;Arial&quot;"> <strong>bold</strong> not bold <b>bold</b> not bold <!-- everything is bold --> </span> </b> </pre> <pre class="brush:html;toolbar:false;"><b> <span style="FONT: 20pt"> <strong>bold</strong> not bold <b>bold</b> not bold <!-- everything is bold --> </span> </b> </pre> <p></p> <p></p> <p>Can anyone explain this behavior, or at least tell me what styles I should look for to suppress the outer styles? </p>
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P粉283559033

I think I found the answer to my question, on the font css properties documentation page. it says:

(my emphasis)

A little further down:

So setting font: 20pt arial is equivalent to setting font-style: normal;font-variant: normal;font-weight: normal;font-stretch: normal;font-size: 20pt ;line-height: normal;font-family: arial

In particular, font-weight is reset from bold (or other value) to normal.

So to solve my fundamental problem, I should look for font tags that do not specify a font weight.

P.S. font: arial 20ptThe reason there is no such behavior is because this is not an allowed value for font, so it is ignored:

And in font: arial 20pt, the font family is not the last specified value.

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