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<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> <iframe id="iframe" src="{{ book_url }}" frameborder="0"scrolling="yes" style="border: 0px;"></iframe> <script> // 兼容性代码 function autoHeight(iframe) { if (iframe) { var iframeWin = iframe.contentWindow || iframe.contentDocument.parentWindow; if (iframeWin.document.body) { iframe.height = iframeWin.document.documentElement.scrollHeight || iframeWin.document.body.scrollHeight; iframe.width = iframeWin.document.documentElement.scrollWidth || iframeWin.document.body.scrollWidth; } } } window.onload = function() { autoHeight(document.getElementById('iframe')); } </script> </body> </html>