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pdf.js 如何知道滚动到了第几页,有相关监听事件嘛

这里是我链入的JS

<script src="//mozilla.github.io/pdf.js/build/pdf.js"></script>
<script>
        let pdfjsLib = window['pdfjs-dist/build/pdf'];
        pdfjsLib.GlobalWorkerOptions.workerSrc = '//mozilla.github.io/pdf.js/build/pdf.worker.js';
</script>

官方列子,https://mozilla.github.io/pdf.js/web/viewer.html

看它的例子 pagechanging 是如何挂载上去的


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