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What
原始逻辑是在组件mount和dom tree改变后去计算每个section的高度并记录到数组中,但是会出现section中有图片一类在计算后才改变高度的情况,导致锚点定位不准。
Why
How
现优化为收集每一个section的真实dom,在每次点击菜单或滚动时去实时计算高度