指定所有浏览器遵守的字体大小时，是否为小数精度？ [英] Is decimal precision when specifying a font-size respected by all browsers?

问题描述

如果我使用以下CSS：

If I use the following CSS:

p {
    font-size: 20.5px;
}

所有浏览器是否都会绘制为20.5像素，

Will all browsers draw that as 20.5px, or will some round the value?

推荐答案

小数不会在所有浏览器中保持一致。我可以找到的最好的帖子在这里：浏览器舍入

Decimals are not rounded consistently in all browsers. The best post I could find is here: Browser Rounding

这包含一个表格，显示以下内容：

This contains a table that shows the following:

Internet Explorer 7 truncate to 2 decimal places
Internet Explorer 8 truncate to 2 decimal places
Internet Explorer 9 truncate to 2 decimal places
Internet Explorer 10    truncate to 2 decimal places
Internet Explorer 11    truncate to 2 decimal places
Firefox 3.0 truncate to 3 decimal places
Firefox 3.5 truncate to 3 decimal places
Firefox 31  truncate to 3 decimal places
Chrome 20   round to 15 decimal places
Chrome 21   round to 15 decimal places
Chrome 37   round to 13 decimal places
Safari 6 (OSX Lion) round to 15 decimal places
Safari 6.1 (OSX Mountain Lion)  round to 15 decimal places
Safari 7 (OSX Mavericks)    round to 15 decimal places
Mobile Safari 7 (iOS7)  round to 15 decimal places
Mobile Safari 8 (iOS8)  round to 15 decimal places
Chrome 36 (Jelly Bean) [Nexus5] round to 15 decimal places
Chrome 30 (KitKat) [S5] round to 15 decimal places
Android Browser 4 (Jelly Bean) [Nexus7,Nexus4,S4,S3]    round to 15 decimal places
Android Browser 4 (Ice Cream Sandwich) [Nexus,KindleFire2]  round to 15 decimal places
Android Browser 4 (Gingerbread) [S2]    truncate to 3 decimal places
Opera 12    truncate to 2 decimal places
Opera Next 24   round to 13 decimal places

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