Integrate jsPDF in Nativescript - nativescript

Question

I researched that using jsPDF, json response cna be converted into PDF and then can be downloaded. Is there any way to integrate JsPDF in nativescript application?

Answer 1

Check the following POC with jsPDF and NativeScript, you need to override some global variables required by jsPDF and install some packages from npm:
global['window'] = {
'document': {
'createElementNS': () => { return {} }
}
};
global['document'] = {
'createElement': (str) => { return {} }
};
global['navigator'] = {};
import * as base64 from 'base-64';
import * as utf8 from 'utf8';
import * as jsPDF from 'jspdf';
global['btoa'] = (str) => {
var bytes = utf8.encode(str);
return base64.encode(bytes);
};
Example: https://play.nativescript.org/?template=play-ng&id=OGrw9s&v=8
By other hand, you can use a NativeScript shim for aotb / btoa functions, to avoid install more packages from npm (Only install jspdf and #types/jspdf): https://play.nativescript.org/?template=play-ng&id=OGrw9s&v=13
As you can see in the logic of the component, you need to import the file and modify some global variables:
require('../base64')
global['window'] = {
'document': {
'createElementNS': () => { return {} }
},
'atob': global['atob']
};
global['document'] = {
'createElement': (str) => { return {} }
};
global['navigator'] = {};
It would be much better to create a fork of jsPDF with that solution.
And later you can create your PDF:
generatePDF() {
var doc = new jsPDF('p', 'pt');
doc.setFontSize(26);
doc.text(40, 50, "My first PDF with NativeScript!");
//Add image
doc.addImage(imgData, 'JPEG', 20, 90, 300, 300)
var base64 = doc.output('datauristring')
dialogs.alert({
title: "PDF - Base64",
message: base64,
okButtonText: "Copy text"
}).then(() => {
clipboard.setText(base64)
});
}