


The previous blog talked about setting the div to be centered . Today I will share how to center the table. As for the principle of centering, I won’t go into details. You can take a look at my last blog. This time, instead of using the two events of window, I used a function called expression. Most browsers now support this function. When I was writing my last blog, I was thinking about whether I could assign the calculated values to the left and top attributes of css? Later, I looked up the information and found this function. This function is used to associate CSS properties with JavaScript expressions. The CSS properties here can be inherent properties of the element or custom properties. That is to say, the CSS attribute can be followed by a JavaScript expression, and the value of the CSS attribute is equal to the JavaScript result. You can directly reference the properties and methods of the element itself in the expression, or you can use other browser objects. The expression is as if it were within a member function of this element.
Okay, let’s take a look at the centered source code first!
You can clearly see that the value written in the expression function is the summarized formula. That is, the height and width of the document minus its own height and width, and then divided by 2 are the values of top and left. Put this code in the style attribute and it will be centered. As shown in the picture:
This way it can be displayed in the center.
Would you like to write this code into css? The answer is yes, so the code will become as follows:
In this way, you can use CSS and JavaScript The table is displayed in the center. This will make the login page look better. It's very simple!

在css中,可用list-style-type属性来去掉ul的圆点标记,语法为“ul{list-style-type:none}”;list-style-type属性可设置列表项标记的类型,当值为“none”可不定义标记,也可去除已有标记。

区别是:css是层叠样式表单,是将样式信息与网页内容分离的一种标记语言,主要用来设计网页的样式,还可以对网页各元素进行格式化;xml是可扩展标记语言,是一种数据存储语言,用于使用简单的标记描述数据,将文档分成许多部件并对这些部件加以标识。

在css中,可以利用cursor属性实现鼠标隐藏效果,该属性用于定义鼠标指针放在一个元素边界范围内时所用的光标形状,当属性值设置为none时,就可以实现鼠标隐藏效果,语法为“元素{cursor:none}”。

转换方法:1、给英文元素添加“text-transform: uppercase;”样式,可将所有的英文字母都变成大写;2、给英文元素添加“text-transform:capitalize;”样式,可将英文文本中每个单词的首字母变为大写。

在css中,rtl是“right-to-left”的缩写,是从右往左的意思,指的是内联内容从右往左依次排布,是direction属性的一个属性值;该属性规定了文本的方向和书写方向,语法为“元素{direction:rtl}”。

在css中,可以利用“font-style”属性设置i元素不是斜体样式,该属性用于指定文本的字体样式,当属性值设置为“normal”时,会显示元素的标准字体样式,语法为“i元素{font-style:normal}”。

在css3中,可以用“transform-origin”属性设置rotate的旋转中心点,该属性可更改转换元素的位置,第一个参数设置x轴的旋转位置,第二个参数设置y轴旋转位置,语法为“transform-origin:x轴位置 y轴位置”。


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