I had huge problems with this
First I tried .clear()
then I tried .destroy()
and I tried setting my chart reference to null
What finally fixed the issue for me: deleting the <canvas>
element and then reappending a new <canvas>
to the parent container
My specific code (obviously there’s a million ways to do this):
var resetCanvas = function(){
$('#results-graph').remove(); // this is my <canvas> element
$('#graph-container').append('<canvas id="results-graph"><canvas>');
canvas = document.querySelector('#results-graph');
ctx = canvas.getContext('2d');
ctx.canvas.width = $('#graph').width(); // resize to parent width
ctx.canvas.height = $('#graph').height(); // resize to parent height
var x = canvas.width/2;
var y = canvas.height/2;
ctx.font="10pt Verdana";
ctx.textAlign = 'center';
ctx.fillText('This text is centered on the canvas', x, y);
};