see on GitHub

    How to Check if an Attachment Exists

    • To check whether a document contains a certain attachment,
      use the method exists() from the advanced.attachments session operations.

    • Calling 'exists' does not load the document or the attachment to the session,
      and the session will not track them.

    • In this page:

    Check if attachment exists 

    const exists = await session
    .advanced
    .attachments
    .exists("categories/1-A", "image.jpg");

if (exists) {
    // attachment 'image.jpg' exists on document 'categories/1-A'
}

    Syntax 

    session.advanced.attachments.exists(docId, attachmentName);
    Parameter Type Description
    docId string The ID of the document you want to check
    attachmentName string The name of the attachment you are looking for
    Return Value Description
    Promise<boolean> true - The specified attachment exists on the document
    false - The attachment does not exist on the document

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