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The document object is an instance accessible from the main mupdfwv.MuPDFWebViewer instance as follows: 
const document = mupdf.document;
This assumes you have returned your instance name as mupdf from the initMuPDFWebViewer() promise!

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document

The document object has the following methods:

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open

open(config: { url: string, filename: string }) Opens a PDF document.
  • Arguments:
    • config – (required) The configuration object.
Config object:
  • Arguments:
    • url – (required) File path to open.
    • filename – (required) The file name to use for the file.
  • Returns: Promise.
Example 
mupdf.document.open({url:"my-file.pdf", filename:"My File"});
// remote URL
mupdf.document.open({url:"https://example.com/my-file.pdf", filename:"My File"});
Please note: when loading a remote PDF then ensure that you have the correct CORS & CSP settings in place to provide the PDF.CORS (Cross-Origin Resource Sharing) and CSP (Content Security Policy) are both web security mechanisms.
  • CORS is about server-to-server communication from browsers
  • CSP is about what content your own webpage can load and execute
If a remote PDF fails to load in MuPDF WebViewer then it is very possible that this might be related to one of these security mechanisms - ensure to check your console logs for any errors!

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close

close() Closes the currently opened PDF document.
  • Returns: Promise.
Example 
mupdf.document.close();

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download

download(config?: { fileName?: string, includeAnnotations?: boolean }) Downloads the PDF file.
  • Arguments:
    • config – (optional) The configuration object. If not set the original document filename is used with any annotations included.
Config object:
  • Arguments:
    • fileName – (optional) Name of the file to download.
    • includeAnnotations – (optional) Default true. Whether to include annotations.
  • Returns: Promise.
Example 
mupdf.document.download({fileName:"my-file.pdf", includeAnnotations:false});

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export

export(config?: { includeAnnotations?: boolean }) Exports the PDF. Returns the PDF data in Uint8Array format.
  • Arguments:
    • config – (optional) The configuration object. If not set the document will be exported with annotations.
Config object:
  • Arguments:
    • includeAnnotations – (optional) Default true. Whether to include annotations.
  • Returns: Promise<Uint8Array<ArrayBufferLike>>.
Example 
async function exportDoc() {
    mupdf.toast.show({ type: 'notification', content: 'Exporting ... please wait' });
    mupdf.document.export({includeAnnotations:true}).then(exportSuccess, exportFailure)
};

async function exportSuccess(data) {
    mupdf.toast.show({ type: 'success', content: 'Exporting complete' });
    // do what you need with the `data`
}

async function exportFailure(error) {
    mupdf.toast.show({ type: 'fail', content: 'Export error' });
    console.error(`error: ${error}`);
}

exportDoc()
See exporting troubleshooting

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getPages

getPages(config?: { pageRange?: string }) Gets PDF page information.
  • Arguments:
    • config – (optional) The configuration object. If not set then all pages are returned.
Config object:
  • Arguments:
    • pageRange – (optional) Default: “all”. Page index range (e.g., “0-5, 7, 9-12”, “all”).
Page references are zero-indexed.
  • Returns: Promise<{ pages: mupdfwv.PageInfo[]; }>.
Example 
mupdf.document.getPages({pageRange:"0-3"});

// returns e.g.

{
pages: {
    pageIndex: number;
    read: boolean;
    isVisible: boolean;
    bbox: {
    width: number;
    height: number;
    x: number;
    y: number;
    }
}[]
}

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getPageCount

getPageCount() Gets the total number of pages in the PDF.
  • Returns: Promise<{ pageCount: number; }.
Example 
mupdf.document.getPageCount();

// returns e.g

{ pageCount: number }

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print

print(config?: { pageRange: string }) Prints the PDF.
  • Arguments:
    • config – (optional) The configuration object. If not set then the whole document will be printed.
Config object:
  • Arguments:
    • pageRange – (required) Page index range (e.g., “0-5, 7, 9-12”, “all”).
Page references are zero-indexed.
  • Returns: Promise<mupdfwv.PrintResult>.
Example 
mupdf.document.print({pageRange:"0-3"});

// returns e.g.

{ status: 'PRINTED' | 'CANCELLED' }

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rotatePage

rotatePage(config: { pageRange: string, degree: mupdf.refs.degree }) Rotates pages.
  • Arguments:
    • config – (required) The configuration object.
Config object:
  • Arguments:
    • pageRange – (required) Page index range (e.g., “0-5, 7, 9-12”, “all”).
Page references are zero-indexed.
  • Returns: Promise.
Example 
mupdf.document.rotatePage({pageRange:"0", degree:mupdf.refs.degree.DEG_90});

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getText

getText(config?: { pageRange?: string }) Extracts text from the PDF.
  • Arguments:
    • config – (optional) The configuration object. If not set then the whole document will be used.
Config object:
  • Arguments:
    • pageRange – (optional) Default: “all”. Page index range (e.g., “0-5, 7, 9-12”, “all”).
  • Returns: Promise<{ pageIndex: number; text: string; }[]>.
Example 
async function getText() {
    return mupdf.document.getText({pageRange:"0"});
}

function successCallbackGetText(data) {
    console.log(`Text Data is: ${data[0].text}`);
}

function failureCallbackGetText(error) {
    console.error(`Error getting text: ${error}`);
}

getText().then(successCallbackGetText, failureCallbackGetText);