shareReceipt.js

            function shareReceipt() {
                var canvas = document.getElementById("receipt");
                var context = canvas.getContext("2d");

                const messages = [
                  "################################",
                  "Central Jogos",
                  "################################",
                  "Apostador: test",
                  "Valor apostado: R$ 5,00",
                  "Valor de retorno: R$ 6,15",
                  "Data da aposta: 19/02/2017 15:07",
                  "Quantidade de jogos: 1",
                  "--------------------------------",
                  "Vasco X Flamengo",
                  "Empate: 1.23",
                  "10/03/2017 15:30",
                  "================================",
                  "Cambista: Cambista Teste",
                  "Telefone: (82) 9977-8877"
                ];

                context.font = "12px Courier new";

                y = 12;
                for (var i in messages)
                {
                  context.fillText(messages[i], 0, y);
                  y += 18;
                }

                //console.log(context.canvas.toDataURL());
                var base64 = context.canvas.toDataURL();

                alert(base64);

                window.plugins.socialsharing.share(
                    null,
                    'Comprovante de Aposta',
                    base64,
                    null
                );

                /*window.plugins.socialsharing.shareViaWhatsApp(
                    'Message via WhatsApp',
                    null,
                    null,
                    function() {alert('share ok');},
                    function(errormsg){alert(errormsg);}
                );*/
            }