列表项的 "marker box" 是在 "principal box" 内部还是旁边生成的？
Is "marker box" of an list-item generated inside of the "principal box" or next to it?
阅读 CSS specification section 9.2 Controlling box generation 它说：
Certain values of the 'display' property cause an element of the
source document to generate a principal box that contains descendant
boxes and generated content and is also the box involved in any
positioning scheme. Some elements may generate additional boxes in
addition to the principal box: 'list-item' elements. These additional
boxes are placed with respect to the principal box.
那么这个“关于 主框”究竟是什么意思？是 "inside of principal box"（例如亲子关系）还是 "next to principal box"（例如兄弟姐妹关系）？
换句话说，列表项项目符号（标记框）是否在列表项主体框内？如果是这样，是否意味着 "marker box" 在主框块格式化上下文中浮动到左侧？
属性 list-style-position 确定标记框是在主框旁边还是在主框内。
数值分别为outside和inside。默认值为 outside.
阅读 CSS specification section 9.2 Controlling box generation 它说：
Certain values of the 'display' property cause an element of the source document to generate a principal box that contains descendant boxes and generated content and is also the box involved in any positioning scheme. Some elements may generate additional boxes in addition to the principal box: 'list-item' elements. These additional boxes are placed with respect to the principal box.
那么这个“关于 主框”究竟是什么意思？是 "inside of principal box"（例如亲子关系）还是 "next to principal box"（例如兄弟姐妹关系）？
换句话说，列表项项目符号（标记框）是否在列表项主体框内？如果是这样，是否意味着 "marker box" 在主框块格式化上下文中浮动到左侧？
属性 list-style-position 确定标记框是在主框旁边还是在主框内。
数值分别为outside和inside。默认值为 outside.