Chart.js Line Chart drawTime 示例

HTML

CSS

JavaScript

HTML

<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no" />
<title>Chart.js Line Chart drawTime</title>
<meta name="keywords" content="LightYear,光年,后台模板,后台管理系统,光年HTML模板">
<meta name="description" content="LightYear是一个基于Bootstrap的后台管理系统的HTML模板。">
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</head>
  
<body>
<div class="chart-example">
  <div class="tab-content">
    <div class="chart-view"><canvas id="myChart"></canvas></div>
    <div class="chart-actions mt-3"></div>
    <ul class="nav nav-tabs mt-3">
      <li class="nav-item">
        <a class="nav-link active" data-toggle="tab" href="#myChart-data" aria-selected="true">Data</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" data-toggle="tab" href="#myChart-config" aria-selected="true">Config</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" data-toggle="tab" href="#myChart-setup" aria-selected="false">Setup</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" data-toggle="tab" href="#myChart-actions" aria-selected="false">Actions</a>
      </li>
    </ul>
    <div class="tab-content">
      <div class="tab-pane fade show active tab-pane-code" id="myChart-data">
        <pre>
const data = {
  labels: generateLabels(),
  datasets: [
    {
      label: 'Dataset 1',
      data: generateData(),
      borderColor: Utils.CHART_COLORS.red,
      backgroundColor: Utils.CHART_COLORS.red,
      fill: true
    },
    {
      label: 'Dataset 2',
      data: generateData(),
      borderColor: Utils.CHART_COLORS.blue,
      backgroundColor: Utils.transparentize(Utils.CHART_COLORS.blue),
      fill: true
    }
  ]
};
        </pre>
      </div>
      <div class="tab-pane fade show tab-pane-code" id="myChart-config">
        <pre>
const config = {
  type: 'line',
  data: data,
  options: {
    plugins: {
      filler: {
        propagate: false,
      },
      title: {
        display: true,
        text: (ctx) => 'drawTime: ' + ctx.chart.options.plugins.filler.drawTime
      }
    },
    pointBackgroundColor: '#fff',
    radius: 10,
    interaction: {
      intersect: false,
    }
  },
};
        </pre>
      </div>
      <div class="tab-pane fade tab-pane-code" id="myChart-setup">
        <pre>
const inputs = {
  min: -100,
  max: 100,
  count: 8,
  decimals: 2,
  continuity: 1
};

const generateLabels = () => {
  return Utils.months({count: inputs.count});
};

Utils.srand(3);
const generateData = () => (Utils.numbers(inputs));
        </pre>
      </div>
      <div class="tab-pane fade tab-pane-code" id="myChart-actions">
        <pre>
let smooth = false;

const actions = [
  {
    name: 'drawTime: beforeDatasetDraw (default)',
    handler: (chart) => {
      chart.options.plugins.filler.drawTime = 'beforeDatasetDraw';
      chart.update();
    }
  },
  {
    name: 'drawTime: beforeDatasetsDraw',
    handler: (chart) => {
      chart.options.plugins.filler.drawTime = 'beforeDatasetsDraw';
      chart.update();
    }
  },
  {
    name: 'drawTime: beforeDraw',
    handler: (chart) => {
      chart.options.plugins.filler.drawTime = 'beforeDraw';
      chart.update();
    }
  },
  {
    name: 'Randomize',
    handler(chart) {
      chart.data.datasets.forEach(dataset => {
        dataset.data = generateData();
      });
      chart.update();
    }
  },
  {
    name: 'Smooth',
    handler(chart) {
      smooth = !smooth;
      chart.options.elements.line.tension = smooth ? 0.4 : 0;
      chart.update();
    }
  }
];
        </pre>
      </div>
    </div>
  </div>
</div>

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<script type="text/javascript" src="http://lyear.itshubao.com/v4/js/bootstrap.min.js"></script>
<script type="text/javascript" src="https://cdn.bootcdn.net/ajax/libs/Chart.js/4.1.1/chart.umd.min.js"></script>
<script type="text/javascript" src="https://cdn.bootcdn.net/ajax/libs/luxon/3.2.0/luxon.min.js"></script>
<script type="text/javascript" src="http://libs.itshubao.com/chartjs/utils.js"></script>
</body>
</html>

CSS

body{
  background: #fff;
}
.tab-content .chart-view {
  max-width: 800px;
}
.tab-content .tab-pane-code {
  height: 360px;
  overflow: auto;
}
.tab-content .tab-pane-code pre {
  height: 100%;
  margin: 0px;
}
.chart-example {
  width: calc(100% - 2px);
  border: 1px solid #ececec;
  padding: 10px;
}

JavaScript

let smooth = false;

const actions = [
  {
    name: 'drawTime: beforeDatasetDraw (default)',
    handler: (chart) => {
      chart.options.plugins.filler.drawTime = 'beforeDatasetDraw';
      chart.update();
    }
  },
  {
    name: 'drawTime: beforeDatasetsDraw',
    handler: (chart) => {
      chart.options.plugins.filler.drawTime = 'beforeDatasetsDraw';
      chart.update();
    }
  },
  {
    name: 'drawTime: beforeDraw',
    handler: (chart) => {
      chart.options.plugins.filler.drawTime = 'beforeDraw';
      chart.update();
    }
  },
  {
    name: 'Randomize',
    handler(chart) {
      chart.data.datasets.forEach(dataset => {
        dataset.data = generateData();
      });
      chart.update();
    }
  },
  {
    name: 'Smooth',
    handler(chart) {
      smooth = !smooth;
      chart.options.elements.line.tension = smooth ? 0.4 : 0;
      chart.update();
    }
  }
];

const inputs = {
  min: -100,
  max: 100,
  count: 8,
  decimals: 2,
  continuity: 1
};

const generateLabels = () => {
  return Utils.months({count: inputs.count});
};

Utils.srand(3);
const generateData = () => (Utils.numbers(inputs));

const data = {
  labels: generateLabels(),
  datasets: [
    {
      label: 'Dataset 1',
      data: generateData(),
      borderColor: Utils.CHART_COLORS.red,
      backgroundColor: Utils.CHART_COLORS.red,
      fill: true
    },
    {
      label: 'Dataset 2',
      data: generateData(),
      borderColor: Utils.CHART_COLORS.blue,
      backgroundColor: Utils.transparentize(Utils.CHART_COLORS.blue),
      fill: true
    }
  ]
};

const config = {
  type: 'line',
  data: data,
  options: {
    plugins: {
      filler: {
        propagate: false,
      },
      title: {
        display: true,
        text: (ctx) => 'drawTime: ' + ctx.chart.options.plugins.filler.drawTime
      }
    },
    pointBackgroundColor: '#fff',
    radius: 10,
    interaction: {
      intersect: false,
    }
  },
};

const ctx = document.getElementById('myChart');

const chart = new Chart(ctx, config);

$.each(actions, function(index, value) {
    let aHtml = $('<a></a>').addClass('btn btn-default m-r-5').html(value.name);
    $('.chart-actions').append(aHtml);
    aHtml.on('click', function () {
        value.handler(chart);
    });
});