However, this will change the font size of every p element that is the first-child of any other element. If you're interested in setting the size of the first p element of the body element, then use the following: body > p:first-child { font-size: 115%; } The above code will only work with the p element that is a child of the body element.

2016年12月28日 · Enclose your code with the html and body tags. Size attribute does not correspond to font-size and it looks like its domain does not go beyond value 7. Furthermore font tag is not supported in HTML5. Consider this code for your case

2018年1月25日 · A common practice is to manually set the font-size explicitly on html, usually to that 16px value, and then use rems in other places to set the final display value. However, that practice has accessibility problems for when users want or need to increase the default font size, so you should design your pages and layouts so that they can adapt ...

2009年10月15日 · HTML: Font size is too big - why? 3. Why are the font sizes different. 9. font size in html code. 0 ...

body { font-size: 62.5%; } Then you can use em in the same sense as you would use pixels, except you divide by 10. For example: h1 { font-size: 1.4em; /* 14px */ } We learnt to use em for 'elastic' layouts. If you specify your font-size in em, the text will keep its proportions after a user zooms in or out.

2011年3月23日 · For an actual proof, take a look at the html.css (171 - 237) with the default style of Mozilla Firefox: h1 { font-size: 2em; } h2 { font-size: 1.5em; } h3 { font-size: 1.17em; } h4 { font-size: 1.00em; } h5 { font-size: 0.83em; } h6 { font-size: 0.67em; }

Using font-family: Arial is a pretty safe bet, since almost all computers have the Arial font, but to be safe it is best to include a couple of fall-back fonts. Quotation marks (or single-quotes) are traditionally used around multi-word font names or font names with numbers or symbols in them.

2009年5月4日 · According to The W3C:. This attribute sets the size of the font. Possible values: An integer between 1 and 7. This sets the font to some fixed size, whose rendering depends on the user age

2006年11月8日 · Following advice in The 6 Most Important CSS Techniques You Need To Know, I set my body's font-size to 62.5%, the container div's font-size to 1.4 em (slight variation from the article). p.tags and p.published's font-size is set to 1em. However, this doesn't work for me.

If you are able to use java script then you can, using a canvas element, measure the height of a given font size. The size will return a value in pixels for the height of the font you specify. This will only work if the user has calibrated their screen: most have not but the default values are generally close for most monitor setups.