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<!DOCTYPE html>
<html lang="en-US">
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=Edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>area > boundaries | Chart.js sample</title>
<link rel="stylesheet" type="text/css" href="../../style.css">
<script src="../../../dist/Chart.min.js"></script>
<script src="../../utils.js"></script>
<script src="analyser.js"></script>
</head>
<body>
<div class="content">
<div class="wrapper col-2"><canvas id="chart-0"></canvas></div>
<div class="wrapper col-2"><canvas id="chart-1"></canvas></div>
<div class="wrapper col-2"><canvas id="chart-2"></canvas></div>
<div class="wrapper col-2"><canvas id="chart-3"></canvas></div>
<div class="toolbar">
<button onclick="toggleSmooth(this)">Smooth</button>
<button onclick="randomize(this)">Randomize</button>
</div>
</div>
<script>
var presets = window.chartColors;
var utils = Samples.utils;
var inputs = {
min: -100,
max: 100,
count: 8,
decimals: 2,
continuity: 1
};
function generateData(config) {
return utils.numbers(Chart.helpers.merge(inputs, config || {}));
}
function generateLabels(config) {
return utils.months(Chart.helpers.merge({
count: inputs.count,
section: 3
}, config || {}));
}
var options = {
maintainAspectRatio: false,
spanGaps: false,
elements: {
line: {
tension: 0.000001
}
},
plugins: {
filler: {
propagate: false
}
},
scales: {
xAxes: [{
ticks: {
autoSkip: false,
maxRotation: 0
}
}]
}
};
[false, 'origin', 'start', 'end'].forEach(function(boundary, index) {
// reset the random seed to generate the same data for all charts
utils.srand(8);
new Chart('chart-' + index, {
type: 'line',
data: {
labels: generateLabels(),
datasets: [{
backgroundColor: utils.transparentize(presets.red),
borderColor: presets.red,
data: generateData(),
label: 'Dataset',
fill: boundary
}]
},
options: Chart.helpers.merge(options, {
title: {
text: 'fill: ' + boundary,
display: true
}
})
});
});
// eslint-disable-next-line no-unused-vars
function toggleSmooth(btn) {
var value = btn.classList.toggle('btn-on');
Chart.helpers.each(Chart.instances, function(chart) {
chart.options.elements.line.tension = value ? 0.4 : 0.000001;
chart.update();
});
}
// eslint-disable-next-line no-unused-vars
function randomize() {
var seed = utils.rand();
Chart.helpers.each(Chart.instances, function(chart) {
utils.srand(seed);
chart.data.datasets.forEach(function(dataset) {
dataset.data = generateData();
});
chart.update();
});
}
</script>
</body>
</html>