Responsive Chart.js Example with AJAX Callback

chartjs_responsive_ajax_example.html

<canvas id="invoice_status_chart" min-height="300" max-height="500"></canvas>
<script type="text/javascript" charset="utf-8">

	var invoice_status_data = {};

	function invoice_status_chart() {
		var can = jQuery('#invoice_status_chart');
		var ctx = can.get(0).getContext("2d");
		var container = can.parent().parent(); // get width from proper parent

		var $container = jQuery(container);

		can.attr('width', $container.width()); //max width
		can.attr('height', $container.height()); //max height                   

		var chart = new Chart(ctx).Doughnut(invoice_status_data);
	}

	var invoice_status_data = function () {
		jQuery.post( ajaxurl, { 
			action: 'callback_id', 
			data: 'invoice_statuses',
			security: 'nonce' 
			},
			function( data ) {
				invoice_status_data = [
					{
						value: data.status_temp,
						color:"#26292C",
						highlight: "#363B3F",
						label: "Temp"
					},
					{
						value: data.status_pending,
						color:"#FFA500",
						highlight: "#FAD694",
						label: "Pending"
					},
					{
						value: data.status_partial,
						color:"#E14D43",
						highlight: "#FF5A5E",
						label: "Partial"
					},
					{
						value: data.status_complete,
						color: "#76AB48",
						highlight: "#86BC4A",
						label: "Complete"
					}
				];
				invoice_status_chart();
			}
		);
	};

	jQuery(document).ready(function($) {
		jQuery(window).resize(invoice_status_chart);
		invoice_status_data();
	});
</script>