触发了bfc的block level box，没有margin callapse的问题，并且边缘不会和float box的边缘重叠，利用它...
不可替换行内块(non-replaced inline blocks)和不可替换表单元格(non-replaced table cells)是块容器盒,但不是块级盒。如果一个块级盒同时又是一个块容器盒,那么我们可以叫这个块级盒为块盒(block boxes)。 块级盒和块容器盒是两个并列的概念,他们的关系如下图: 更准确的图示: 3.1 匿名块盒(Anonymous blo...
/* Apply to all four sides */ margin: 1em; margin: -3px; /* top and bottom | left and right */ margin: 5% auto; /* top | left and right | bottom */ margin: 1em auto 2em; /* top | right | bottom | left */ margin: 2px 1em 0 auto; /* Global values */ margin: in...
content 到 border 之间有一个圈空白,这个圈叫做padding,也就是内边距 Border 的外面又有一个圈空白叫margin,也就是外边距 padding 主要影响的是盒内的空间 —— 主要决定盒内的空间排布,也就是 content 区域的大小 margin 主要影响的是盒外的空间 —— 决定了盒周围空白区域的大小 盒模型里面的 宽 (width) ...
Margin Trim What ismargin-trim? Themargin-trimproperty removes any margin in the direction specified from the selected containerat the end of that direction.Imagine you have five blocks in a row that all have right margin on them in a container. You might select the:last-childto remove the...
6. Common Pitfalls and Things to Watch Out For Every tool has its quirks, and understanding them is key to mastering the tool. Margin Collapsing margins:One of the more confusing behaviors of CSS is when vertical margins between blocks collapse into a single margin. This typically happens when...
Box Model规定了元素框处理元素内容(element content)、内边距(padding)、边框(border) 和 外边距(margin) 的方式。盒子模型有 block,inline-block,inline,flex,table-cell等几种显示方式。 如图所示,元素的高度和宽度指的是盒子模型的content区域的高度和宽度,不包括内边距以外的部分。(IE的content则是包含border、...
2.1.38 [CSS-Level2-2009] Section 8.5.4, Border shorthand properties: 'border-top', 'border-right', 'border-bottom', 'border-left', and 'border' 2.1.39 [CSS-Level2-2009] Section 9.2.1.1, Anonymous block boxes 2.1.40 [CSS-Level2-2009] Section 9.2.4, The 'display' property 2....
For de-emphasizing inline or blocks of text, use the tag to set text at 85% the size of the parent. Heading elements receive their own font-size for nested elements. You may alternatively use an inline element with .small in place of any . This line of text is meant to be treated...
See the Pen [Margins: empty boxes](https://codepen.io/rachelandrew/pen/JQLGMr) byRachel Andrew. See the PenMargins: empty boxesbyRachel Andrew. Parent And First Or Last Child Element This is the margin collapsing scenario which catches people out most often, as it does not seem particularl...