const pdf2base64 = require('pdf-to-base64');
pdf2base64("test/sample.pdf")
    .then(
        (response) => {
            console.log(response); //cGF0aC90by9maWxlLmpwZw==
        }
    )
    .catch(
        (error) => {
            console.log(error); //Exepection error....
        }
    )

const pdf2base64 = require('pdf-to-base64');
pdf2base64("http://www.africau.edu/images/default/sample.pdf")
    .then(
        (response) => {
            console.log(response); //cGF0aC90by9maWxlLmpwZw==
        }
    )
    .catch(
        (error) => {
            console.log(error); //Exepection error....
        }
    )