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https://github.com/chartjs/Chart.js.git
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b7139dbbef
Samples are supposed to show good practices and in most cases we don't use the time scale but require `Chart.bundle.js`, which is not correct. Instead, we should require the non-bundled version in its minified version (`Chart.min.js`). Paradoxically, time based examples don't use `Chart.bundle.js` but require moment manually side to `Chart.min.js`, which IMO is also the correct way since it allows users to configure and use moment globally (TZ, locales, etc.) and doesn't enforce a specific moment version. Also remove the `data-labelling.html` example because we now have an [official plugin](https://github.com/chartjs/chartjs-plugin-datalabels) that implements this feature and don't want to deal with user custom code anymore.
204 lines
5.0 KiB
HTML
204 lines
5.0 KiB
HTML
<!doctype html>
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<html>
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<head>
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<title>Line Chart</title>
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<script src="https://cdnjs.cloudflare.com/ajax/libs/moment.js/2.13.0/moment.min.js"></script>
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<script src="../../../dist/Chart.min.js"></script>
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<script src="../../utils.js"></script>
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<style>
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canvas {
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-moz-user-select: none;
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-webkit-user-select: none;
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-ms-user-select: none;
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}
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</style>
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</head>
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<body>
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<div style="width:75%;">
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<canvas id="canvas"></canvas>
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</div>
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<br>
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<br>
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<button id="randomizeData">Randomize Data</button>
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<button id="addDataset">Add Dataset</button>
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<button id="removeDataset">Remove Dataset</button>
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<button id="addData">Add Data</button>
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<button id="removeData">Remove Data</button>
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<script>
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var timeFormat = 'MM/DD/YYYY HH:mm';
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function newDate(days) {
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return moment().add(days, 'd').toDate();
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}
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function newDateString(days) {
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return moment().add(days, 'd').format(timeFormat);
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}
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var color = Chart.helpers.color;
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var config = {
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type: 'line',
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data: {
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labels: [ // Date Objects
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newDate(0),
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newDate(1),
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newDate(2),
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newDate(3),
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newDate(4),
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newDate(5),
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newDate(6)
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],
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datasets: [{
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label: 'My First dataset',
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backgroundColor: color(window.chartColors.red).alpha(0.5).rgbString(),
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borderColor: window.chartColors.red,
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fill: false,
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data: [
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randomScalingFactor(),
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randomScalingFactor(),
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randomScalingFactor(),
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randomScalingFactor(),
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randomScalingFactor(),
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randomScalingFactor(),
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randomScalingFactor()
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],
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}, {
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label: 'My Second dataset',
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backgroundColor: color(window.chartColors.blue).alpha(0.5).rgbString(),
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borderColor: window.chartColors.blue,
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fill: false,
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data: [
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randomScalingFactor(),
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randomScalingFactor(),
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randomScalingFactor(),
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randomScalingFactor(),
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randomScalingFactor(),
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randomScalingFactor(),
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randomScalingFactor()
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],
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}, {
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label: 'Dataset with point data',
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backgroundColor: color(window.chartColors.green).alpha(0.5).rgbString(),
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borderColor: window.chartColors.green,
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fill: false,
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data: [{
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x: newDateString(0),
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y: randomScalingFactor()
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}, {
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x: newDateString(5),
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y: randomScalingFactor()
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}, {
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x: newDateString(7),
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y: randomScalingFactor()
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}, {
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x: newDateString(15),
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y: randomScalingFactor()
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}],
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}]
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},
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options: {
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title: {
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text: 'Chart.js Time Scale'
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},
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scales: {
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xAxes: [{
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type: 'time',
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time: {
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parser: timeFormat,
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// round: 'day'
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tooltipFormat: 'll HH:mm'
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},
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scaleLabel: {
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display: true,
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labelString: 'Date'
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}
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}],
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yAxes: [{
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scaleLabel: {
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display: true,
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labelString: 'value'
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}
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}]
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},
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}
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};
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window.onload = function() {
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var ctx = document.getElementById('canvas').getContext('2d');
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window.myLine = new Chart(ctx, config);
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};
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document.getElementById('randomizeData').addEventListener('click', function() {
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config.data.datasets.forEach(function(dataset) {
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dataset.data.forEach(function(dataObj, j) {
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if (typeof dataObj === 'object') {
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dataObj.y = randomScalingFactor();
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} else {
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dataset.data[j] = randomScalingFactor();
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}
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});
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});
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window.myLine.update();
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});
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var colorNames = Object.keys(window.chartColors);
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document.getElementById('addDataset').addEventListener('click', function() {
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var colorName = colorNames[config.data.datasets.length % colorNames.length];
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var newColor = window.chartColors[colorName];
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var newDataset = {
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label: 'Dataset ' + config.data.datasets.length,
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borderColor: newColor,
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backgroundColor: color(newColor).alpha(0.5).rgbString(),
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data: [],
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};
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for (var index = 0; index < config.data.labels.length; ++index) {
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newDataset.data.push(randomScalingFactor());
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}
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config.data.datasets.push(newDataset);
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window.myLine.update();
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});
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document.getElementById('addData').addEventListener('click', function() {
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if (config.data.datasets.length > 0) {
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config.data.labels.push(newDate(config.data.labels.length));
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for (var index = 0; index < config.data.datasets.length; ++index) {
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if (typeof config.data.datasets[index].data[0] === 'object') {
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config.data.datasets[index].data.push({
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x: newDate(config.data.datasets[index].data.length),
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y: randomScalingFactor(),
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});
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} else {
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config.data.datasets[index].data.push(randomScalingFactor());
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}
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}
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window.myLine.update();
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}
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});
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document.getElementById('removeDataset').addEventListener('click', function() {
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config.data.datasets.splice(0, 1);
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window.myLine.update();
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});
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document.getElementById('removeData').addEventListener('click', function() {
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config.data.labels.splice(-1, 1); // remove the label first
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config.data.datasets.forEach(function(dataset) {
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dataset.data.pop();
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});
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window.myLine.update();
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});
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</script>
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</body>
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</html>
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