Set the background color for PDF in Node.js

In case you want to set background color of PDF, you can use AsposePdfSetBackgroundColor function.

Please check the following code snippet in order to set background color of PDF in Node.js environment.

CommonJS:

1. Call require and import asposepdfnodejs module as AsposePdf variable.
2. Specify the name of the PDF file whose background color you want to set.
3. Call AsposePdf as Promise and perform the operation for setting background color. Receive the object if successful.
4. Call the function AsposePdfSetBackgroundColor.
5. Set the background color for the PDF file. You need to pass 3 arguments to this function: an input file name, a desired color in hexadecimal form, and an output file name. Thus, if ‘json.errorCode’ is 0, the result of the operation is saved in “ResultRotation.pdf”. If the json.errorCode parameter is not 0 and, accordingly, an error appears in your file, the error information will be contained in ‘json.errorText’.

  const AsposePdf = require('asposepdfnodejs');
  const pdf_file = 'Aspose.pdf';
  AsposePdf().then(AsposePdfModule => {
      /*Set the background color for the PDF-file and save the "ResultPdfSetBackgroundColor.pdf"*/
      const json = AsposePdfModule.AsposePdfSetBackgroundColor(pdf_file, "#426bf4", "ResultPdfSetBackgroundColor.pdf");
      console.log("AsposePdfSetBackgroundColor => %O", json.errorCode == 0 ? json.fileNameResult : json.errorText);
  });

ECMAScript/ES6:

1. Import the asposepdfnodejs module.
2. Specify the name of the PDF file whose background color you want to set.
3. Initialize the AsposePdf module. Receive the object if successful.
4. Call the function AsposePdfSetBackgroundColor.
5. Set the background color for the PDF file. The background color is set to “#426bf4,” which is a hexadecimal color code representing a shade of blue. Thus, if ‘json.errorCode’ is 0, the result of the operation is saved in “ResultRotation.pdf”. If the json.errorCode parameter is not 0 and, accordingly, an error appears in your file, the error information will be contained in ‘json.errorText’.

  import AsposePdf from 'asposepdfnodejs';
  const AsposePdfModule = await AsposePdf();
  const pdf_file = 'Aspose.pdf';
  /*Set the background color for the PDF-file and save the "ResultPdfSetBackgroundColor.pdf"*/
  const json = AsposePdfModule.AsposePdfSetBackgroundColor(pdf_file, "#426bf4", "ResultPdfSetBackgroundColor.pdf");
  console.log("AsposePdfSetBackgroundColor => %O", json.errorCode == 0 ? json.fileNameResult : json.errorText);