HTML5 Canvas into web view


#1

canvas is supported in web view? i cant get it to work


#2

Can you be more specific? Which version you are using, possibly with some code snippet. It worked just fine for me with latest (v3.4.1).


#3

v3.4.2

i want to show chart with webview

this is the code of chart.js

<canvas id="myChart" width="400" height="400"></canvas>
<script>
var ctx = document.getElementById("myChart").getContext('2d');
var myChart = new Chart(ctx, {
     type: 'bar',
    data: {
        labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
        datasets: [{
            label: '# of Votes',
             data: [12, 19, 3, 5, 2, 3],
             backgroundColor: [
               'rgba(255, 99, 132, 0.2)',
                'rgba(54, 162, 235, 0.2)',
                 'rgba(255, 206, 86, 0.2)',
                 'rgba(75, 192, 192, 0.2)',
                 'rgba(153, 102, 255, 0.2)',
                 'rgba(255, 159, 64, 0.2)'
             ],
             borderColor: [
                 'rgba(255,99,132,1)',
                 'rgba(54, 162, 235, 1)',
                 'rgba(255, 206, 86, 1)',
                 'rgba(75, 192, 192, 1)',
                'rgba(153, 102, 255, 1)',
                'rgba(255, 159, 64, 1)'
             ],
             borderWidth: 1
         }]
     },
     options: {
         scales: {
             yAxes: [{
                 ticks: {
                     beginAtZero:true
                }
             }]
         }
     }
 });
 </script>

but its not showing nothing

<WebView src="~/path/to/chart.html" />


#4

i’m getting this log in console

CONSOLE LOG file:///app/tns_modules/tns-core-modules/ui/web-view/web-view.js:59:28: null


#5

Just works as expected for me. Not sure which chart library you are using Or it’s possible could be a problem with your file. Lets know if you could reproduce the issue with playground.


#6

i forgot to include chart.js source code

<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.7.1/Chart.js"></script>
thanks anyway