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闲读源码：ScrollingElement Polyfill

.noscript-warning { position: fixed; z-index: 999999; top: 0; left: 0; right: 0; margin: auto; padding: 10px; font-size: 1.2em; color: #fff; background: orange; text-align: center; }This site works best with JavaScript enabled

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闲读源码：ScrollingElement Polyfill