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Detailed explanation of the box-ordinal-group attribute of the box's layout position

云罗郡主

Oct 23, 2018 pm 03:39 PM

This article brings you a detailed explanation of the box-ordinal-group attribute of the layout position of the box. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

We know that the box-direction attribute can set the order of the "child elements" inside the flexible box. In the CSS3 flexible box model, we can also use the box-ordinal-group attribute to set the "accurate" display position of each "child element" in the flexible box.

The value of the box-ordinal-group attribute is a natural number, starting from 1, used to set the position number of child elements. The distribution of child elements will be arranged from small to large according to this attribute value. By default, child elements will be arranged based on the element's position.

Note that for sub-elements that do not specify a box-ordinal-group attribute value, the serial number of the sub-element defaults to 1. And child elements with the same serial number will be arranged in the order they are loaded in the HTML document.

Let’s look at an example first, and then review these knowledge points:

<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
    <title>CSS3 box-ordinal-group属性</title>
    <style type="text/css">
        body
        {
            display:-webkit-box;
            -webkit-box-orient:horizontal;   /*定义盒子元素内的元素从左到右流动显示*/
        }
        div{height:100px;line-height:100px;}
        #box1
        {
            background:red;
            -webkit-box-ordinal-group:2;
        }
        #box2
        {
            background:blue;
            -webkit-box-ordinal-group:3;
        }
        #box3
        {
            background:yellow;
            -webkit-box-ordinal-group:1;
        }
    </style>
</head>
<body>
    <div id="box1">盒子1</div>
    <div id="box2">盒子2</div>
    <div id="box3">盒子3</div>
</body>
</html>

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Detailed explanation of the box-ordinal-group attribute of the boxs layout position

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