2020年的方式

.parent{ 
  display: grid;
  place-items: center;
}

div { 身高:90 px; 行高:90 px; text-align:中心; 边界:2px虚线#f69c55; } < div > 你好,世界! ! < / div >

添加行显示:table-cell;到该div的CSS内容。

只有表格单元格支持vertical-align: middle;，但是你可以把[table-cell]定义给div…

一个活生生的例子在这里:http://jsfiddle.net/tH2cc/

div{
    height: 90px;
    width: 90px;
    text-align: center;
    border: 1px solid silver;
    display: table-cell; /* This says treat this element like a table cell */
    vertical-align:middle; /* Now we can center vertically like in a TD */
}

方法1

div { 身高:90 px; 行高:90 px; text-align:中心; 边界:2px虚线#f69c55; ｝ < div > 你好,世界! ! < / div >

方法2

div { 身高:200 px; 行高:200 px; text-align:中心; 边界:2px虚线#f69c55; ｝ 跨度{ 显示:inline-block; vertical-align:中间; 行高:正常; ｝ < div > <span>我与你同在，我与你同在。对我说，对我说，对我说。非enim iam stirpis bonum quaeret, sed animalis。< / span > < / div >

方法3

div { 显示:表; 身高:100 px; 宽度:100%; text-align:中心; 边界:2px虚线#f69c55; ｝ 跨度{ 显示:表格单元; vertical-align:中间; ｝ < div > <span>神圣的神圣，神圣的神圣。</span> < / div >

您可以尝试以下方法:

If you have a single word or one line sentence, then the following code can do the trick. Have a text inside a div tag and give it an id. Define the following properties for that id. id-name { height: 90px; line-height: 90px; text-align: center; border: 2px dashed red; } Note: Make sure the line-height property is same as the height of the division. Image But, if the content is more than one single word or a line then this doesn’t work. Also, there will be times when you cannot specify the size of a division in px or % (when the division is really small and you want the content to be exactly in the middle). To solve this issue, we can try the following combination of properties. id-name { display: flex; justify-content: center; align-items: center; border: 2px dashed red; } Image These 3 lines of code sets the content exactly in the middle of a division (irrespective of the size of the display). The "align-items: center" helps in vertical centering while "justify-content: center" will make it horizontally centered. Note: Flex does not work in all browsers. Make sure you add appropriate vendor prefixes for additional browser support.

Use:

# Parent
{
  display: table;
}

# Child
{
  display: table-cell;
  width: 100%; /* As large as its parent to center the text horizontally */
  text-align: center;
  vertical-align: middle; /* Vertically align this element on its parent */
}