Chart.js Line Chart 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</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。">
<meta name="author" content="yinqi">
<link rel="stylesheet" type="text/css" href="http://lyear.itshubao.com/v4/css/bootstrap.min.css">
<link rel="stylesheet" type="text/css" href="http://lyear.itshubao.com/v4/css/style.min.css">
</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-options" aria-selected="true">Config</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" data-toggle="tab" href="#myChart-data" aria-selected="false">Data</a>
      </li>
      <li class="nav-item">
        <a class="nav-link" data-toggle="tab" href="#myChart-setup" aria-selected="false">Setup</a>
      </li>
    </ul>
    <div class="tab-content">
      <div class="tab-pane fade show active tab-pane-code" id="myChart-options">
        <pre>
function getLineColor(ctx) {
  return Utils.color(ctx.datasetIndex);
}

function alternatePointStyles(ctx) {
  const index = ctx.dataIndex;
  return index % 2 === 0 ? 'circle' : 'rect';
}

function makeHalfAsOpaque(ctx) {
  return Utils.transparentize(getLineColor(ctx));
}

function adjustRadiusBasedOnData(ctx) {
  const v = ctx.parsed.y;
  return v < 10 ? 5
    : v < 25 ? 7
    : v < 50 ? 9
    : v < 75 ? 11
    : 15;
}

const config = {
  type: 'line',
  data: data,
  options: {
    plugins: {
      legend: false,
      tooltip: true,
    },
    elements: {
      line: {
        fill: false,
        backgroundColor: getLineColor,
        borderColor: getLineColor,
      },
      point: {
        backgroundColor: getLineColor,
        hoverBackgroundColor: makeHalfAsOpaque,
        radius: adjustRadiusBasedOnData,
        pointStyle: alternatePointStyles,
        hoverRadius: 15,
      }
    }
  }
};
        </pre>
      </div>
      <div class="tab-pane fade tab-pane-code" id="myChart-data">
        <pre>
function generateData() {
  return Utils.numbers({
    count: DATA_COUNT,
    min: 0,
    max: 100
  });
}

const data = {
  labels: Utils.months({count: DATA_COUNT}),
  datasets: [{
    data: generateData()
  }]
};
        </pre>
      </div>
      <div class="tab-pane fade tab-pane-code" id="myChart-setup">
        <pre>
const DATA_COUNT = 12;
Utils.srand(110);

const actions = [
  {
    name: 'Randomize',
    handler(chart) {
      chart.data.datasets.forEach(dataset => {
        dataset.data = generateData();
      });
      chart.update();
    }
  },
];
        </pre>
      </div>
    </div>
  </div>
</div>

<script type="text/javascript" src="http://lyear.itshubao.com/v4/js/jquery.min.js"></script>
<script type="text/javascript" src="http://lyear.itshubao.com/v4/js/popper.min.js"></script>
<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

const DATA_COUNT = 12;
Utils.srand(110);

const actions = [
  {
    name: 'Randomize',
    handler(chart) {
      chart.data.datasets.forEach(dataset => {
        dataset.data = generateData();
      });
      chart.update();
    }
  },
];

function generateData() {
  return Utils.numbers({
    count: DATA_COUNT,
    min: 0,
    max: 100
  });
}

const data = {
  labels: Utils.months({count: DATA_COUNT}),
  datasets: [{
    data: generateData()
  }]
};

function getLineColor(ctx) {
  return Utils.color(ctx.datasetIndex);
}

function alternatePointStyles(ctx) {
  const index = ctx.dataIndex;
  return index % 2 === 0 ? 'circle' : 'rect';
}

function makeHalfAsOpaque(ctx) {
  return Utils.transparentize(getLineColor(ctx));
}

function adjustRadiusBasedOnData(ctx) {
  const v = ctx.parsed.y;
  return v < 10 ? 5
    : v < 25 ? 7
    : v < 50 ? 9
    : v < 75 ? 11
    : 15;
}

const config = {
  type: 'line',
  data: data,
  options: {
    plugins: {
      legend: false,
      tooltip: true,
    },
    elements: {
      line: {
        fill: false,
        backgroundColor: getLineColor,
        borderColor: getLineColor,
      },
      point: {
        backgroundColor: getLineColor,
        hoverBackgroundColor: makeHalfAsOpaque,
        radius: adjustRadiusBasedOnData,
        pointStyle: alternatePointStyles,
        hoverRadius: 15,
      }
    }
  }
};

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);
    });
});