爱站程序员基地<!DOCTYPE html><html lang=\"en\"><head><meta charset=\"UTF-8\"><meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\"><title>单行文字垂直居中原理</title><style>div {font-size: 30px;width: 100px;height: 100px;line-height: 100px; //使行高等于盒子的高，就能使文字垂直居中background-color:blue;}</style></head><body><div>ththh</div></body></html>
