Articles under the label of 查缺补漏

[模糊]一些知识点的补充[随时补充更新]

1.【css】上下左右剧中样式(dialog弹窗的居中)position:fixed; top:50%; left:50%; transform:translate(-50%,-50%) 伪元素:before搭配vertical-align:middle实现元素垂直居中2.小程序报错TypeError: Cannot read property ‘mark’ of undefined项目之...