How to merge multiple PDF Documents together in Node.JS

Here’s a quick tutorial on merging numerous PDF files into a single PDF. Getting this done in Node.JS has never been easier, as I am about to demonstrate.

With this dependencies reference in our package.json file, we can install our client without any hassle.

"dependencies": {
    "cloudmersive-convert-api-client": "^2.1.6"
  }

From there, call mergeDocumentPdfMulti.

var CloudmersiveConvertApiClient = require('cloudmersive-convert-api-client');
var defaultClient = CloudmersiveConvertApiClient.ApiClient.instance;
// Configure API key authorization: Apikey
var Apikey = defaultClient.authentications['Apikey'];
Apikey.apiKey = 'YOUR API KEY';
// Uncomment the following line to set a prefix for the API key, e.g. "Token" (defaults to null)
//Apikey.apiKeyPrefix = 'Token';
var apiInstance = new CloudmersiveConvertApiClient.MergeDocumentApi();
var inputFile1 = "/path/to/file"; // File | First input file to perform the operation on.
var inputFile2 = "/path/to/file"; // File | Second input file to perform the operation on.
var opts = {
'inputFile3': "/path/to/file", // File | Third input file to perform the operation on.
'inputFile4': "/path/to/file", // File | Fourth input file to perform the operation on.
'inputFile5': "/path/to/file", // File | Fifth input file to perform the operation on.
'inputFile6': "/path/to/file", // File | Sixth input file to perform the operation on.
'inputFile7': "/path/to/file", // File | Seventh input file to perform the operation on.
'inputFile8': "/path/to/file", // File | Eighth input file to perform the operation on.
'inputFile9': "/path/to/file", // File | Ninth input file to perform the operation on.
'inputFile10': "/path/to/file" // File | Tenth input file to perform the operation on.
};
var callback = function(error, data, response) {
if (error) {
console.error(error);
} else {
console.log('API called successfully. Returned data: ' + data);
}
};
apiInstance.mergeDocumentPdfMulti(inputFile1, inputFile2, opts, callback);

As you can see, you may input as many as 10 files at a time. The function can then be repeated with the output as inputFile1, allowing you to daisy-chain together as many PDFs as you wish. Not bad.