I am using canvas to draw chartjs onto the page and that works as it should,
until user leaves the page and returns then the canvas is not showing.
private ngAfterViewInit() {
// if (ctx) ctx.destroy();
let canvas: any = document.getElementById("myChart");
let ctx = canvas.getContext("2d");
ctx.canvas.width = 350;
ctx.canvas.height = 300;
var plot = new ChartJs(ctx, {
type: 'line',
data: {
labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
datasets: [{
label: 'Avg',
data: [8,7,5,6,3,2,4,5,7],
backgroundColor: [
'rgba(25,229,22,0.2)',
],
borderColor: [
'rgba(25,229,22,1)',
],
borderWidth: 1
}
]
},
options: {
responsive: false,
scales: {
yAxes: [{
stacked: true
}]
}
}
});
}
tried to test if canvas exist and then destroy it on every launch of ngAfterViewInit but that didn’t work because at that point it’s not even declared.
any ideas?