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2024年5月3日发(作者:)

}

});

});

// Update page counters

mentById('page_num').textContent = pageNum;

}

/**

* If another page rendering in progress, waits until the rendering is

* finised. Otherwise, executes rendering immediately.

*/

function queueRenderPage(num) {

if (pageRendering) {

pageNumPending = num;

} else {

renderPage(num);

}

}

/**

* Displays previous page.

*/

function onPrevPage() {

if (pageNum <= 1) {

return;

}

pageNum--;

queueRenderPage(pageNum);

}

mentById('prev').addEventListener('click', onPrevPage);

/**

* Displays next page.

*/

function onNextPage() {

if (pageNum >= es) {

return;

}

pageNum++;

queueRenderPage(pageNum);

}

mentById('next').addEventListener('click', onNextPage);

/**

* Asynchronously downloads PDF.

*/

ument(url).then(function (pdfDoc_) {

pdfDoc = pdfDoc_;

mentById('page_count').textContent = es;

// Initial/first page rendering

renderPage(pageNum);

});

}

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