The CSS just sizes the <div> , vertically center aligns the <span> by setting the <div> 's line-height equal to its height, and makes the <span> an inline-block ... ... <看更多>

The lack of good ways to vertically center elements in CSS has been a dark blemish on ... Even if the text in this box changes to make it wider or taller, ... ... <看更多>

The memoir document class provides, among a lot of other excellent things, the vplace environment. Try: \documentclass{memoir} \begin{document} ... ... <看更多>

You need to vertically and horizontaly align text of Text component inside this NON-flex block, textAlign will do horizontal alignment, ... ... <看更多>

You need to vertically and horizontaly align text of Text component inside this NON-flex block, textAlign will do horizontal alignment, ... ... <看更多>