Why layout is this and how to do it

<!DOCTYPE html>
<html lang="en">
    <meta charset="UTF-8">
    <title>test word</title>
    <script type="text/javascript" src=""></script>
<div id="placeholder"></div>
    new DocsAPI.DocEditor("placeholder", {
        "document": {
            "fileType": "docx",
            "key": "dK84vfHOUXL7IJVw2dQU4ngmljgKSe6E2",
            "title": "Example Document Title.docx",
            // "url": ""
            "url": "https://gdyqs.yuntsg.com/upload/202413/1704258540810.docx"
        "documentType": "word",
        // "token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJkb2N1bWVudCI6eyJmaWxlVHlwZSI6ImRvY3giLCJrZXkiOiJLaGlyejZ6VFBkZmQ3IiwidGl0bGUiOiJFeGFtcGxlIERvY3VtZW50IFRpdGxlLmRvY3giLCJ1cmwiOiJodHRwczovL2V4YW1wbGUuY29tL3VybC10by1leGFtcGxlLWRvY3VtZW50LmRvY3gifSwiZG9jdW1lbnRUeXBlIjoid29yZCJ9.7IpEJxdOvBQ0kJ8l6ZegIV4tX5vsPbZZCDDVmcFROXc"
        "token": "my_jwt_secret"

code is up and when i browser test is below

and i F12 the web console not any error

Hello @gcr

Please let me know versions of Document Server and the browser that you are using.

Meanwhile, please try adding style parameter to html like that:

<html style="height: 100%;">