WebMar 7, 2024 · margin属性在以下情况下会失效 display计算值为inline的垂直margin无效 content 表格中的tr和td元素或者display计算值为table-cell或table-row的元素 margin 合 … WebThis issue is known as Margin Collapse and happens sometimes between top and bottom margins on block elements. The margins of adjacent siblings are collapsed. That's why the margin doesn't work on the p tag. To make it work here an option is to use padding-top on the p tag. And on the a tag the margin doesn't work because it's an inline element.
Why does this CSS margin-top style not work? - Stack …
WebCSS свойство margin определяет внешний отступ на всех четырёх сторонах элемента. Это сокращение, которое устанавливает все отдельные поля одновременно: margin-top, margin-right, margin-bottom и margin-left. Webtop. top 样式 属性定义了定位元素的上外边距边界与其包含块上边界之间的偏移,非定位元素设置此属性无效。. /* values */ top: 3px; top: 2.4em; /* 参照于包含块高度的百分比 */ top: 10%; /* Keyword value */ top: auto; /* Global values */ top: inherit; top: initial; top: unset; top 的 ... perishable cargo meaning
css的margin和padding什么时候有效设么时候无效? - 知乎
WebJul 16, 2012 · For lining up the top of the element, it uses the top margin. By default this is in line with the top of the element, but you can alter it with CSS. In your case, top 50% would result in the top of the element … WebJun 6, 2024 · 既然已经知道是margin发生了重叠,并且知道了浮动元素和绝对定位元素不会出现margin折叠,那就让他们变成浮动或者定位元素就好了呀 所以,我们可以 … WebTry it Yourself ». In the example above, the element has a top and bottom margin of 30px. The perishable birthday gifts