I have a div block that simulates a small spinner, everything works fine however with the css configurations that I have it is positioned in ... ... <看更多>

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What is the current behavior? I want to position the spinner horizontally and vertically center inside . I tried both "text-align: center" and " ... ... <看更多>

First, For the universal selector, the performance diference will be negligible exept if you load 100s or 1000s of those element with into ... ... <看更多>