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Member
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这个算法太复杂了，还要做排序。可以优化下，找别的方法。 |
Author
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改了，用path的方法之前其实考虑过，忘了之前为什么不用，可能是出于兼容性的原因吧。 |
Member
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其实正统的是用parentNode 或者 parentElement遍历 |
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