html horizontal align

The block is centered vertically in the block(Position:absolute; top:50%; margin-top:-one-second height) blocks are centered horizontally in blocks(child element Set margin:0 Auto or Auto) Use Method 1 to center the vertical horizontally#box {width:100px;height:80px;Background-color:gray;Position:absolute;top:50%;left:50%;margin-top:-40px; margin-left:-50px; } The vertical horizontal center of the block element in the

HTML with UL Li to achieve multi-level horizontal menu

First of all, Happy National Day ~ ~ ~ This is my first national day outside the province, after all, after graduating this year Wow, the struggle we want to refuel ~ ~ ~Recently I will continue to summarize the previous Web project to use the front-end knowledge, and everyone share ha ~ ~ ~So, how do you draw a horizontal line? I think there are three ways, but the style is different, so everyone according to the needs of OH.1.It's simple.2.：A little

HTML formats the text box appearance to show only the bottom horizontal linestyle>input[type= ' text ']{background:None;Border:None;Border-bottom:1px solid #ddd;}//All input box type is text. INP{background:None;Border:None;Border-bottom:1px solid #ddd;}style>inputtype= "Number"value=""class= "INP"/>Reference: https://zhidao.baidu.com/question/1242984244365752339.htmlSet Picture Centerstyle> *{paddin

How to achieve the effect of horizontal lines passing through text in an HTML page? There are three ways to achieve this effect, as follows: 1, is the use of CSS style sheet text-decoration:line-through; Property 2, is the use of 3, is the use of