import DocViewer from "polaris-doc-viewer";

function App() {
  const docs = [
    { uri: "https://url-to-my-pdf.pdf", suffix: 'pdf' },
    { uri: require("./example-files/pdf.pdf"), suffix: 'pdf'  }, // Local File
  ];

  return <DocViewer documents={docs} />;
}

import DocViewer, { DocViewerRenderers } from "polaris-doc-viewer";

<DocViewer
  pluginRenderers={DocViewerRenderers}
  {/* ... */}
/>;

import DocViewer, { PDFRenderer, PNGRenderer } from "polaris-doc-viewer";

<DocViewer
  pluginRenderers={[PDFRenderer, PNGRenderer]}
  {/* ... */}
/>;

import React from "react";
import DocViewer from "polaris-doc-viewer";

const MyCustomPNGRenderer: DocRenderer = ({
  mainState: { currentDocument },
}) => {
  if (!currentDocument) return null;

  return (
    <div id="my-png-renderer">
      <img id="png-img" src={currentDocument.fileData as string} />
    </div>
  );
};

MyCustomPNGRenderer.fileTypes = ["png", "image/png"];

import DocViewer, { DocViewerRenderers } from "polaris-doc-viewer";

<DocViewer
  pluginRenderers={[MyCustomPNGRenderer]}
  documents={
    [
      // ...
    ]
  }
/>;

MyCustomPNGRenderer.fileLoader = ({
  documentURI,
  signal,
  fileLoaderComplete,
}) => {
  myCustomFileLoaderCode().then(() => {
    // Whenever you have finished you must call fileLoaderComplete() to remove the loading animation
    fileLoaderComplete();
  });
};

import styled from "styled-components";
//...
<MyDocViewer documents={docs} />;
//...
const MyDocViewer = styled(DocViewer)`
  border-radius: 10px;
`;

import React from "react";
import { DocRenderer } from "../../types";

// Be sure that Renderer correctly uses type DocRenderer
const JPGRenderer: DocRenderer = ({ mainState: { currentDocument } }) => {
  if (!currentDocument) return null;

  return (
    <div id="jpg-renderer">
      <img id="jpg-img" src={currentDocument.fileData as string} />
    </div>
  );
};

export default JPGRenderer;

// List the MIME types that this renderer will respond to
JPGRenderer.fileTypes = ["jpg", "jpeg", "image/jpg", "image/jpeg"];

//如果同一个MIME类型有多个渲染器，使用weight。越高越好。
//包含的渲染器的权重为0
JPGRenderer.weight = 1;

const myHeader: IHeaderOverride = (state, previousDocument, nextDocument) => {
    if (!state.currentDocument || state.config?.header?.disableFileName) {
      return null;
    }

    return (
      <>
        <div>{state.currentDocument.uri || ""}</div>
        <div>
          <button
            onClick={previousDocument}
            disabled={state.currentFileNo === 0}
          >
            Previous Document
          </button>
          <button
            onClick={nextDocument}
            disabled={state.currentFileNo >= state.documents.length - 1}
          >
            Next Document
          </button>
        </div>
      </>
    );
  };

<DocViewer
  pluginRenderers={DocViewerRenderers}
  documents={
    {
      /**/
    }
  }
  config={{
    header: {
      overrideComponent: myHeader;
      },
    },
  }
/>