Step Line Chart in Vue Charts

3 Feb 202624 minutes to read

Step Line

To render a step line series in your chart, you need to follow a few steps to configure it correctly. Here’s a concise guide on how to do this:

  • Set the series type: Define the series type as StepLine in your chart configuration. This indicates that the data should be represented as a step line chart, which connects data points with horizontal and vertical lines, creating a staircase effect. This type is ideal for displaying data that changes at distinct points.

  • Inject the StepLineSeries module: Use the provide: { chart: [StepLineSeries]} method to inject the StepLineSeries module into your chart. This step is essential, as it ensures that the necessary functionalities for rendering step line series are available in your chart.

<template>
  <div id="app">
    <ejs-chart id="container" :title='title' :primaryXAxis='primaryXAxis' :primaryYAxis='primaryYAxis'>
      <e-series-collection>
        <e-series :dataSource='seriesData' type='StepLine' xName='x' yName='y'> </e-series>
      </e-series-collection>
    </ejs-chart>
  </div>
</template>
<script setup>
import { provide } from "vue";
import { ChartComponent as EjsChart, SeriesCollectionDirective as ESeriesCollection, SeriesDirective as ESeries, StepLineSeries } from "@syncfusion/ej2-vue-charts";

const seriesData = [
  { x: 2005, y: 370 },
  { x: 2006, y: 378 },
  { x: 2007, y: 416 },
  { x: 2008, y: 404 },
  { x: 2009, y: 390 },
  { x: 2010, y: 376 },
  { x: 2011, y: 365 },
  { x: 2012, y: 350 }
];
const primaryXAxis = {
  minimum: 2004, 
  maximum: 2013, 
  interval: 1,
  title: 'Year'
};
const primaryYAxis = {
  minimum: 330, 
  maximum: 450, 
  interval: 30,
  title: 'Intensity (g/kWh)'
};
const title = 'CO2 - Intensity Analysis';

provide('chart', [StepLineSeries]);

</script>
<style>
  #container {
    height: 350px;
  }
</style>
<template>
  <div id="app">
    <ejs-chart id="container" :title='title' :primaryXAxis='primaryXAxis' :primaryYAxis='primaryYAxis'>
      <e-series-collection>
        <e-series :dataSource='seriesData' type='StepLine' xName='x' yName='y'> </e-series>
      </e-series-collection>
    </ejs-chart>
  </div>
</template>
<script>

import { ChartComponent, SeriesCollectionDirective, SeriesDirective, StepLineSeries } from "@syncfusion/ej2-vue-charts";

export default {
  name: "App",
  components: {
    'ejs-chart': ChartComponent,
    'e-series-collection': SeriesCollectionDirective,
    'e-series': SeriesDirective
  },
  data() {
    return {
      seriesData: [
        { x: 2005, y: 370 },
        { x: 2006, y: 378 },
        { x: 2007, y: 416 },
        { x: 2008, y: 404 },
        { x: 2009, y: 390 },
        { x: 2010, y: 376 },
        { x: 2011, y: 365 },
        { x: 2012, y: 350 }
      ],
      primaryXAxis: {
        minimum: 2004, 
        maximum: 2013, 
        interval: 1,
        title: 'Year'
      },
      primaryYAxis: {
        minimum: 330, 
        maximum: 450, 
        interval: 30,
        title: 'Intensity (g/kWh)'
      },
      title: 'CO2 - Intensity Analysis'
    };
  },
  provide: {
    chart: [StepLineSeries]
  }
};
</script>
<style>
  #container {
    height: 350px;
  }
</style>

Binding data with series

You can bind data to the chart using the dataSource property within the series configuration. This allows you to connect a JSON dataset or remote data to your chart. To display the data correctly, map the fields from the data to the chart series xName and yName properties.

<template>
  <div id="app">
    <ejs-chart id="container" :title='title' :primaryXAxis='primaryXAxis' :primaryYAxis='primaryYAxis'>
      <e-series-collection>
        <e-series :dataSource='seriesData' type='StepLine' xName='x' yName='y'> </e-series>
      </e-series-collection>
    </ejs-chart>
  </div>
</template>
<script setup>
import { provide } from "vue";
import { ChartComponent as EjsChart, SeriesCollectionDirective as ESeriesCollection, SeriesDirective as ESeries, StepLineSeries } from "@syncfusion/ej2-vue-charts";

const seriesData = [
  { x: 2005, y: 370 },
  { x: 2006, y: 378 },
  { x: 2007, y: 416 },
  { x: 2008, y: 404 },
  { x: 2009, y: 390 },
  { x: 2010, y: 376 },
  { x: 2011, y: 365 },
  { x: 2012, y: 350 }
];
const primaryXAxis = {
  minimum: 2004, 
  maximum: 2013, 
  interval: 1,
  title: 'Year'
};
const primaryYAxis = {
  minimum: 330, 
  maximum: 450, 
  interval: 30,
  title: 'Intensity (g/kWh)'
};
const title = 'CO2 - Intensity Analysis';

provide('chart', [StepLineSeries]);

</script>
<style>
  #container {
    height: 350px;
  }
</style>
<template>
  <div id="app">
    <ejs-chart id="container" :title='title' :primaryXAxis='primaryXAxis' :primaryYAxis='primaryYAxis'>
      <e-series-collection>
        <e-series :dataSource='seriesData' type='StepLine' xName='x' yName='y'> </e-series>
      </e-series-collection>
    </ejs-chart>
  </div>
</template>
<script>

import { ChartComponent, SeriesCollectionDirective, SeriesDirective, StepLineSeries } from "@syncfusion/ej2-vue-charts";

export default {
  name: "App",
  components: {
    'ejs-chart': ChartComponent,
    'e-series-collection': SeriesCollectionDirective,
    'e-series': SeriesDirective
  },
  data() {
    return {
      seriesData: [
        { x: 2005, y: 370 },
        { x: 2006, y: 378 },
        { x: 2007, y: 416 },
        { x: 2008, y: 404 },
        { x: 2009, y: 390 },
        { x: 2010, y: 376 },
        { x: 2011, y: 365 },
        { x: 2012, y: 350 }
      ],
      primaryXAxis: {
        minimum: 2004, 
        maximum: 2013, 
        interval: 1,
        title: 'Year'
      },
      primaryYAxis: {
        minimum: 330, 
        maximum: 450, 
        interval: 30,
        title: 'Intensity (g/kWh)'
      },
      title: 'CO2 - Intensity Analysis'
    };
  },
  provide: {
    chart: [StepLineSeries]
  }
};
</script>
<style>
  #container {
    height: 350px;
  }
</style>

Series customization

The following properties can be used to customize the step line series.

Fill

The fill property determines the color applied to the series.

<template>
  <div id="app">
    <ejs-chart id="container" :title='title' :primaryXAxis='primaryXAxis' :primaryYAxis='primaryYAxis'>
      <e-series-collection>
        <e-series :dataSource='seriesData' type='StepLine' xName='x' yName='y' fill='green'> </e-series>
      </e-series-collection>
    </ejs-chart>
  </div>
</template>
<script setup>
import { provide } from "vue";
import { ChartComponent as EjsChart, SeriesCollectionDirective as ESeriesCollection, SeriesDirective as ESeries, StepLineSeries } from "@syncfusion/ej2-vue-charts";

const seriesData = [
  { x: 2005, y: 370 },
  { x: 2006, y: 378 },
  { x: 2007, y: 416 },
  { x: 2008, y: 404 },
  { x: 2009, y: 390 },
  { x: 2010, y: 376 },
  { x: 2011, y: 365 },
  { x: 2012, y: 350 }
];
const primaryXAxis = {
  minimum: 2004, 
  maximum: 2013, 
  interval: 1,
  title: 'Year'
};
const primaryYAxis = {
  minimum: 330, 
  maximum: 450, 
  interval: 30,
  title: 'Intensity (g/kWh)'
};
const title = 'CO2 - Intensity Analysis';

provide('chart', [StepLineSeries]);

</script>
<style>
  #container {
    height: 350px;
  }
</style>
<template>
  <div id="app">
    <ejs-chart id="container" :title='title' :primaryXAxis='primaryXAxis' :primaryYAxis='primaryYAxis'>
      <e-series-collection>
        <e-series :dataSource='seriesData' type='StepLine' xName='x' yName='y' fill='green'> </e-series>
      </e-series-collection>
    </ejs-chart>
  </div>
</template>
<script>

import { ChartComponent, SeriesCollectionDirective, SeriesDirective, StepLineSeries } from "@syncfusion/ej2-vue-charts";

export default {
  name: "App",
  components: {
    'ejs-chart': ChartComponent,
    'e-series-collection': SeriesCollectionDirective,
    'e-series': SeriesDirective
  },
  data() {
    return {
      seriesData: [
        { x: 2005, y: 370 },
        { x: 2006, y: 378 },
        { x: 2007, y: 416 },
        { x: 2008, y: 404 },
        { x: 2009, y: 390 },
        { x: 2010, y: 376 },
        { x: 2011, y: 365 },
        { x: 2012, y: 350 }
      ],
      primaryXAxis: {
        minimum: 2004, 
        maximum: 2013, 
        interval: 1,
        title: 'Year'
      },
      primaryYAxis: {
        minimum: 330, 
        maximum: 450, 
        interval: 30,
        title: 'Intensity (g/kWh)'
      },
      title: 'CO2 - Intensity Analysis'
    };
  },
  provide: {
    chart: [StepLineSeries]
  }
};
</script>
<style>
  #container {
    height: 350px;
  }
</style>

The fill property can be used to apply a gradient color to the step line series. By configuring this property with gradient values, you can create a visually appealing effect in which the color transitions smoothly from one shade to another.

<template>
  <div id="app">
    <ejs-chart id="container" :title='title' :primaryXAxis='primaryXAxis' :primaryYAxis='primaryYAxis'>
      <e-series-collection>
        <e-series :dataSource='seriesData' type='StepLine' xName='x' yName='y' fill='url(#gradient)'> </e-series>
      </e-series-collection>
    </ejs-chart>
  </div>
</template>
<script setup>
import { provide } from "vue";
import { ChartComponent as EjsChart, SeriesCollectionDirective as ESeriesCollection, SeriesDirective as ESeries, StepLineSeries } from "@syncfusion/ej2-vue-charts";

const seriesData = [
  { x: 2005, y: 370 },
  { x: 2006, y: 378 },
  { x: 2007, y: 416 },
  { x: 2008, y: 404 },
  { x: 2009, y: 390 },
  { x: 2010, y: 376 },
  { x: 2011, y: 365 },
  { x: 2012, y: 350 }
];
const primaryXAxis = {
  minimum: 2004, 
  maximum: 2013, 
  interval: 1,
  title: 'Year'
};
const primaryYAxis = {
  minimum: 330, 
  maximum: 450, 
  interval: 30,
  title: 'Intensity (g/kWh)'
};
const title = 'CO2 - Intensity Analysis';

provide('chart', [StepLineSeries]);

</script>
<style>
  #container {
    height: 350px;
  }
</style>
<template>
  <div id="app">
    <ejs-chart id="container" :title='title' :primaryXAxis='primaryXAxis' :primaryYAxis='primaryYAxis'>
      <e-series-collection>
        <e-series :dataSource='seriesData' type='StepLine' xName='x' yName='y' fill='url(#gradient)'> </e-series>
      </e-series-collection>
    </ejs-chart>
  </div>
</template>
<script>

import { ChartComponent, SeriesCollectionDirective, SeriesDirective, StepLineSeries } from "@syncfusion/ej2-vue-charts";

export default {
  name: "App",
  components: {
    'ejs-chart': ChartComponent,
    'e-series-collection': SeriesCollectionDirective,
    'e-series': SeriesDirective
  },
  data() {
    return {
      seriesData: [
        { x: 2005, y: 370 },
        { x: 2006, y: 378 },
        { x: 2007, y: 416 },
        { x: 2008, y: 404 },
        { x: 2009, y: 390 },
        { x: 2010, y: 376 },
        { x: 2011, y: 365 },
        { x: 2012, y: 350 }
      ],
      primaryXAxis: {
        minimum: 2004, 
        maximum: 2013, 
        interval: 1,
        title: 'Year'
      },
      primaryYAxis: {
        minimum: 330, 
        maximum: 450, 
        interval: 30,
        title: 'Intensity (g/kWh)'
      },
      title: 'CO2 - Intensity Analysis'
    };
  },
  provide: {
    chart: [StepLineSeries]
  }
};
</script>
<style>
  #container {
    height: 350px;
  }
</style>

Opacity

The opacity property controls the transparency of the fill and affects how the series blends with background or overlapping series.

<template>
  <div id="app">
    <ejs-chart id="container" :title='title' :primaryXAxis='primaryXAxis' :primaryYAxis='primaryYAxis'>
      <e-series-collection>
        <e-series :dataSource='seriesData' type='StepLine' xName='x' yName='y' opacity=0.5> </e-series>
      </e-series-collection>
    </ejs-chart>
  </div>
</template>
<script setup>
import { provide } from "vue";
import { ChartComponent as EjsChart, SeriesCollectionDirective as ESeriesCollection, SeriesDirective as ESeries, StepLineSeries } from "@syncfusion/ej2-vue-charts";

const seriesData = [
  { x: 2005, y: 370 },
  { x: 2006, y: 378 },
  { x: 2007, y: 416 },
  { x: 2008, y: 404 },
  { x: 2009, y: 390 },
  { x: 2010, y: 376 },
  { x: 2011, y: 365 },
  { x: 2012, y: 350 }
];
const primaryXAxis = {
  minimum: 2004, 
  maximum: 2013, 
  interval: 1,
  title: 'Year'
};
const primaryYAxis = {
  minimum: 330, 
  maximum: 450, 
  interval: 30,
  title: 'Intensity (g/kWh)'
};
const title = 'CO2 - Intensity Analysis';

provide('chart', [StepLineSeries]);

</script>
<style>
  #container {
    height: 350px;
  }
</style>
<template>
  <div id="app">
    <ejs-chart id="container" :title='title' :primaryXAxis='primaryXAxis' :primaryYAxis='primaryYAxis'>
      <e-series-collection>
        <e-series :dataSource='seriesData' type='StepLine' xName='x' yName='y' opacity=0.5> </e-series>
      </e-series-collection>
    </ejs-chart>
  </div>
</template>
<script>

import { ChartComponent, SeriesCollectionDirective, SeriesDirective, StepLineSeries } from "@syncfusion/ej2-vue-charts";

export default {
  name: "App",
  components: {
    'ejs-chart': ChartComponent,
    'e-series-collection': SeriesCollectionDirective,
    'e-series': SeriesDirective
  },
  data() {
    return {
      seriesData: [
        { x: 2005, y: 370 },
        { x: 2006, y: 378 },
        { x: 2007, y: 416 },
        { x: 2008, y: 404 },
        { x: 2009, y: 390 },
        { x: 2010, y: 376 },
        { x: 2011, y: 365 },
        { x: 2012, y: 350 }
      ],
      primaryXAxis: {
        minimum: 2004, 
        maximum: 2013, 
        interval: 1,
        title: 'Year'
      },
      primaryYAxis: {
        minimum: 330, 
        maximum: 450, 
        interval: 30,
        title: 'Intensity (g/kWh)'
      },
      title: 'CO2 - Intensity Analysis'
    };
  },
  provide: {
    chart: [StepLineSeries]
  }
};
</script>
<style>
  #container {
    height: 350px;
  }
</style>

Dash array

The dashArray property determines the pattern of dashes and gaps in the series.

<template>
  <div id="app">
    <ejs-chart id="container" :title='title' :primaryXAxis='primaryXAxis' :primaryYAxis='primaryYAxis'>
      <e-series-collection>
        <e-series :dataSource='seriesData' type='StepLine' xName='x' yName='y' dashArray='5,5'> </e-series>
      </e-series-collection>
    </ejs-chart>
  </div>
</template>
<script setup>
import { provide } from "vue";
import { ChartComponent as EjsChart, SeriesCollectionDirective as ESeriesCollection, SeriesDirective as ESeries, StepLineSeries } from "@syncfusion/ej2-vue-charts";

const seriesData = [
  { x: 2005, y: 370 },
  { x: 2006, y: 378 },
  { x: 2007, y: 416 },
  { x: 2008, y: 404 },
  { x: 2009, y: 390 },
  { x: 2010, y: 376 },
  { x: 2011, y: 365 },
  { x: 2012, y: 350 }
];
const primaryXAxis = {
  minimum: 2004, 
  maximum: 2013, 
  interval: 1,
  title: 'Year'
};
const primaryYAxis = {
  minimum: 330, 
  maximum: 450, 
  interval: 30,
  title: 'Intensity (g/kWh)'
};
const title = 'CO2 - Intensity Analysis';

provide('chart', [StepLineSeries]);

</script>
<style>
  #container {
    height: 350px;
  }
</style>
<template>
  <div id="app">
    <ejs-chart id="container" :title='title' :primaryXAxis='primaryXAxis' :primaryYAxis='primaryYAxis'>
      <e-series-collection>
        <e-series :dataSource='seriesData' type='StepLine' xName='x' yName='y' dashArray='5,5'> </e-series>
      </e-series-collection>
    </ejs-chart>
  </div>
</template>
<script>

import { ChartComponent, SeriesCollectionDirective, SeriesDirective, StepLineSeries } from "@syncfusion/ej2-vue-charts";

export default {
  name: "App",
  components: {
    'ejs-chart': ChartComponent,
    'e-series-collection': SeriesCollectionDirective,
    'e-series': SeriesDirective
  },
  data() {
    return {
      seriesData: [
        { x: 2005, y: 370 },
        { x: 2006, y: 378 },
        { x: 2007, y: 416 },
        { x: 2008, y: 404 },
        { x: 2009, y: 390 },
        { x: 2010, y: 376 },
        { x: 2011, y: 365 },
        { x: 2012, y: 350 }
      ],
      primaryXAxis: {
        minimum: 2004, 
        maximum: 2013, 
        interval: 1,
        title: 'Year'
      },
      primaryYAxis: {
        minimum: 330, 
        maximum: 450, 
        interval: 30,
        title: 'Intensity (g/kWh)'
      },
      title: 'CO2 - Intensity Analysis'
    };
  },
  provide: {
    chart: [StepLineSeries]
  }
};
</script>
<style>
  #container {
    height: 350px;
  }
</style>

Width

The width property specifies the stroke width applied to the series.

<template>
  <div id="app">
    <ejs-chart id="container" :title='title' :primaryXAxis='primaryXAxis' :primaryYAxis='primaryYAxis'>
      <e-series-collection>
        <e-series :dataSource='seriesData' type='StepLine' xName='x' yName='y' width=4> </e-series>
      </e-series-collection>
    </ejs-chart>
  </div>
</template>
<script setup>
import { provide } from "vue";
import { ChartComponent as EjsChart, SeriesCollectionDirective as ESeriesCollection, SeriesDirective as ESeries, StepLineSeries } from "@syncfusion/ej2-vue-charts";

const seriesData = [
  { x: 2005, y: 370 },
  { x: 2006, y: 378 },
  { x: 2007, y: 416 },
  { x: 2008, y: 404 },
  { x: 2009, y: 390 },
  { x: 2010, y: 376 },
  { x: 2011, y: 365 },
  { x: 2012, y: 350 }
];
const primaryXAxis = {
  minimum: 2004, 
  maximum: 2013, 
  interval: 1,
  title: 'Year'
};
const primaryYAxis = {
  minimum: 330, 
  maximum: 450, 
  interval: 30,
  title: 'Intensity (g/kWh)'
};
const title = 'CO2 - Intensity Analysis';

provide('chart', [StepLineSeries]);

</script>
<style>
  #container {
    height: 350px;
  }
</style>
<template>
  <div id="app">
    <ejs-chart id="container" :title='title' :primaryXAxis='primaryXAxis' :primaryYAxis='primaryYAxis'>
      <e-series-collection>
        <e-series :dataSource='seriesData' type='StepLine' xName='x' yName='y' width=4> </e-series>
      </e-series-collection>
    </ejs-chart>
  </div>
</template>
<script>

import { ChartComponent, SeriesCollectionDirective, SeriesDirective, StepLineSeries } from "@syncfusion/ej2-vue-charts";

export default {
  name: "App",
  components: {
    'ejs-chart': ChartComponent,
    'e-series-collection': SeriesCollectionDirective,
    'e-series': SeriesDirective
  },
  data() {
    return {
      seriesData: [
        { x: 2005, y: 370 },
        { x: 2006, y: 378 },
        { x: 2007, y: 416 },
        { x: 2008, y: 404 },
        { x: 2009, y: 390 },
        { x: 2010, y: 376 },
        { x: 2011, y: 365 },
        { x: 2012, y: 350 }
      ],
      primaryXAxis: {
        minimum: 2004, 
        maximum: 2013, 
        interval: 1,
        title: 'Year'
      },
      primaryYAxis: {
        minimum: 330, 
        maximum: 450, 
        interval: 30,
        title: 'Intensity (g/kWh)'
      },
      title: 'CO2 - Intensity Analysis'
    };
  },
  provide: {
    chart: [StepLineSeries]
  }
};
</script>
<style>
  #container {
    height: 350px;
  }
</style>

Step

Use the step property to change the position of the steps in a step line series.

<template>
  <div id="app">
    <ejs-chart id="container" :title='title' :primaryXAxis='primaryXAxis' :primaryYAxis='primaryYAxis'>
      <e-series-collection>
        <e-series :dataSource='seriesData' type='StepLine' xName='x' yName='y' width=4 step='Right'> </e-series>
      </e-series-collection>
    </ejs-chart>
  </div>
</template>
<script setup>
import { provide } from "vue";
import { ChartComponent as EjsChart, SeriesCollectionDirective as ESeriesCollection, SeriesDirective as ESeries, StepLineSeries } from "@syncfusion/ej2-vue-charts";

const seriesData = [
  { x: 2005, y: 370 },
  { x: 2006, y: 378 },
  { x: 2007, y: 416 },
  { x: 2008, y: 404 },
  { x: 2009, y: 390 },
  { x: 2010, y: 376 },
  { x: 2011, y: 365 },
  { x: 2012, y: 350 }
];
const primaryXAxis = {
  minimum: 2004, 
  maximum: 2013, 
  interval: 1,
  title: 'Year'
};
const primaryYAxis = {
  minimum: 330, 
  maximum: 450, 
  interval: 30,
  title: 'Intensity (g/kWh)'
};
const title = 'CO2 - Intensity Analysis';

provide('chart', [StepLineSeries]);

</script>
<style>
  #container {
    height: 350px;
  }
</style>
<template>
  <div id="app">
    <ejs-chart id="container" :title='title' :primaryXAxis='primaryXAxis' :primaryYAxis='primaryYAxis'>
      <e-series-collection>
        <e-series :dataSource='seriesData' type='StepLine' xName='x' yName='y' width=4 step='Right'> </e-series>
      </e-series-collection>
    </ejs-chart>
  </div>
</template>
<script>

import { ChartComponent, SeriesCollectionDirective, SeriesDirective, StepLineSeries } from "@syncfusion/ej2-vue-charts";

export default {
  name: "App",
  components: {
    'ejs-chart': ChartComponent,
    'e-series-collection': SeriesCollectionDirective,
    'e-series': SeriesDirective
  },
  data() {
    return {
      seriesData: [
        { x: 2005, y: 370 },
        { x: 2006, y: 378 },
        { x: 2007, y: 416 },
        { x: 2008, y: 404 },
        { x: 2009, y: 390 },
        { x: 2010, y: 376 },
        { x: 2011, y: 365 },
        { x: 2012, y: 350 }
      ],
      primaryXAxis: {
        minimum: 2004, 
        maximum: 2013, 
        interval: 1,
        title: 'Year'
      },
      primaryYAxis: {
        minimum: 330, 
        maximum: 450, 
        interval: 30,
        title: 'Intensity (g/kWh)'
      },
      title: 'CO2 - Intensity Analysis'
    };
  },
  provide: {
    chart: [StepLineSeries]
  }
};
</script>
<style>
  #container {
    height: 350px;
  }
</style>

No risers

You can eliminate the vertical lines between points by using the noRisers property in a series. This approach is useful for highlighting trends without the distraction of risers.

<template>
  <div id="app">
    <ejs-chart id="container" :title='title' :primaryXAxis='primaryXAxis' :primaryYAxis='primaryYAxis'>
      <e-series-collection>
        <e-series :dataSource='seriesData' type='StepLine' xName='x' yName='y' width=4 noRisers=true> </e-series>
      </e-series-collection>
    </ejs-chart>
  </div>
</template>
<script setup>
import { provide } from "vue";
import { ChartComponent as EjsChart, SeriesCollectionDirective as ESeriesCollection, SeriesDirective as ESeries, StepLineSeries } from "@syncfusion/ej2-vue-charts";

const seriesData = [
  { x: 2005, y: 370 },
  { x: 2006, y: 378 },
  { x: 2007, y: 416 },
  { x: 2008, y: 404 },
  { x: 2009, y: 390 },
  { x: 2010, y: 376 },
  { x: 2011, y: 365 },
  { x: 2012, y: 350 }
];
const primaryXAxis = {
  minimum: 2004, 
  maximum: 2013, 
  interval: 1,
  title: 'Year'
};
const primaryYAxis = {
  minimum: 330, 
  maximum: 450, 
  interval: 30,
  title: 'Intensity (g/kWh)'
};
const title = "CO2 - Intensity Analysis";

provide('chart', [StepLineSeries]);

</script>
<style>
#container {
  height: 350px;
}
</style>
<template>
  <div id="app">
    <ejs-chart id="container" :title='title' :primaryXAxis='primaryXAxis' :primaryYAxis='primaryYAxis'>
      <e-series-collection>
        <e-series :dataSource='seriesData' type='StepLine' xName='x' yName='y' width=4 noRisers=true> </e-series>
      </e-series-collection>
    </ejs-chart>
  </div>
</template>
<script>

import { ChartComponent, SeriesCollectionDirective, SeriesDirective, StepLineSeries } from "@syncfusion/ej2-vue-charts";

export default {
  name: "App",
  components: {
    'ejs-chart': ChartComponent,
    'e-series-collection': SeriesCollectionDirective,
    'e-series': SeriesDirective
  },
  data() {
    return {
      seriesData: [
        { x: 2005, y: 370 },
        { x: 2006, y: 378 },
        { x: 2007, y: 416 },
        { x: 2008, y: 404 },
        { x: 2009, y: 390 },
        { x: 2010, y: 376 },
        { x: 2011, y: 365 },
        { x: 2012, y: 350 }
      ],
      primaryXAxis: {
        minimum: 2004, 
        maximum: 2013, 
        interval: 1,
        title: 'Year'
      },
      primaryYAxis: {
        minimum: 330, 
        maximum: 450, 
        interval: 30,
        title: 'Intensity (g/kWh)'
      },
      title: "CO2 - Intensity Analysis"
    };
  },
  provide: {
    chart: [StepLineSeries]
  },
};
</script>
<style>
#container {
  height: 350px;
}
</style>

Empty points

Data points with null or undefined values are considered empty. Empty data points are ignored and not plotted on the chart.

Mode

Use the mode property to control handling of empty points. Available modes: Gap, Drop, Zero, Average. The default mode is Gap.

<template>
  <div id="app">
    <ejs-chart id="container" :title='title' :primaryXAxis='primaryXAxis' :primaryYAxis='primaryYAxis'>
      <e-series-collection>
        <e-series :dataSource='seriesData' type='StepLine' xName='x' yName='y' width=2 :emptyPointSettings='emptyPointSettings'> </e-series>
      </e-series-collection>
    </ejs-chart>
  </div>
</template>
<script setup>
import { provide } from "vue";
import { ChartComponent as EjsChart, SeriesCollectionDirective as ESeriesCollection, SeriesDirective as ESeries, StepLineSeries } from "@syncfusion/ej2-vue-charts";

const seriesData = [
  { x: 2005, y: 370 },
  { x: 2006, y: 378 },
  { x: 2007, y: 416 },
  { x: 2008, y: 404 },
  { x: 2009, y: undefined },
  { x: 2010, y: 376 },
  { x: 2011, y: 365 },
  { x: 2012, y: 350 }
];
const primaryXAxis = {
  minimum: 2004, 
  maximum: 2013, 
  interval: 1,
  title: 'Year'
};
const primaryYAxis = {
  minimum: 330, 
  maximum: 450, 
  interval: 30,
  title: 'Intensity (g/kWh)'
};
const title = 'CO2 - Intensity Analysis';
const emptyPointSettings = {
  mode: 'Gap'
};

provide('chart', [StepLineSeries]);

</script>
<style>
  #container {
    height: 350px;
  }
</style>
<template>
  <div id="app">
    <ejs-chart id="container" :title='title' :primaryXAxis='primaryXAxis' :primaryYAxis='primaryYAxis'>
      <e-series-collection>
        <e-series :dataSource='seriesData' type='StepLine' xName='x' yName='y' width=2 :emptyPointSettings='emptyPointSettings'> </e-series>
      </e-series-collection>
    </ejs-chart>
  </div>
</template>
<script>

import { ChartComponent, SeriesCollectionDirective, SeriesDirective, StepLineSeries } from "@syncfusion/ej2-vue-charts";

export default {
  name: "App",
  components: {
    'ejs-chart': ChartComponent,
    'e-series-collection': SeriesCollectionDirective,
    'e-series': SeriesDirective
  },
  data() {
    return {
      seriesData: [
        { x: 2005, y: 370 },
        { x: 2006, y: 378 },
        { x: 2007, y: 416 },
        { x: 2008, y: 404 },
        { x: 2009, y: undefined },
        { x: 2010, y: 376 },
        { x: 2011, y: 365 },
        { x: 2012, y: 350 }
      ],
      primaryXAxis: {
        minimum: 2004, 
        maximum: 2013, 
        interval: 1,
        title: 'Year'
      },
      primaryYAxis: {
        minimum: 330, 
        maximum: 450, 
        interval: 30,
        title: 'Intensity (g/kWh)'
      },
      title: 'CO2 - Intensity Analysis',
      emptyPointSettings: {
        mode: 'Gap'
      }
    };
  },
  provide: {
    chart: [StepLineSeries]
  }
};
</script>
<style>
  #container {
    height: 350px;
  }
</style>

Fill

Use the fill property to set the fill color for empty points.

<template>
  <div id="app">
    <ejs-chart id="container" :title='title' :primaryXAxis='primaryXAxis' :primaryYAxis='primaryYAxis'>
      <e-series-collection>
        <e-series :dataSource='seriesData' type='StepLine' xName='x' yName='y' width=2 :emptyPointSettings='emptyPointSettings' :marker='marker'> </e-series>
      </e-series-collection>
    </ejs-chart>
  </div>
</template>
<script setup>
import { provide } from "vue";
import { ChartComponent as EjsChart, SeriesCollectionDirective as ESeriesCollection, SeriesDirective as ESeries, StepLineSeries } from "@syncfusion/ej2-vue-charts";

const seriesData = [
  { x: 2005, y: 370 },
  { x: 2006, y: 378 },
  { x: 2007, y: 416 },
  { x: 2008, y: 404 },
  { x: 2009, y: undefined },
  { x: 2010, y: 376 },
  { x: 2011, y: 365 },
  { x: 2012, y: 350 }
];
const primaryXAxis = {
  minimum: 2004, 
  maximum: 2013, 
  interval: 1,
  title: 'Year'
};
const primaryYAxis = {
  minimum: 330, 
  maximum: 450, 
  interval: 30,
  title: 'Intensity (g/kWh)'
};
const title = 'CO2 - Intensity Analysis';
const marker = { 
  visible: true, 
  width: 7, 
  height: 7, 
  isFilled: true 
};
const emptyPointSettings = {
  mode: 'Average',
  fill: '#800000'
};

provide('chart', [StepLineSeries]);

</script>
<style>
  #container {
    height: 350px;
  }
</style>
<template>
  <div id="app">
    <ejs-chart id="container" :title='title' :primaryXAxis='primaryXAxis' :primaryYAxis='primaryYAxis'>
      <e-series-collection>
        <e-series :dataSource='seriesData' type='StepLine' xName='x' yName='y' width=2 :emptyPointSettings='emptyPointSettings' :marker='marker'> </e-series>
      </e-series-collection>
    </ejs-chart>
  </div>
</template>
<script>

import { ChartComponent, SeriesCollectionDirective, SeriesDirective, StepLineSeries } from "@syncfusion/ej2-vue-charts";

export default {
  name: "App",
  components: {
    'ejs-chart': ChartComponent,
    'e-series-collection': SeriesCollectionDirective,
    'e-series': SeriesDirective
  },
  data() {
    return {
      seriesData: [
        { x: 2005, y: 370 },
        { x: 2006, y: 378 },
        { x: 2007, y: 416 },
        { x: 2008, y: 404 },
        { x: 2009, y: undefined },
        { x: 2010, y: 376 },
        { x: 2011, y: 365 },
        { x: 2012, y: 350 }
      ],
      primaryXAxis: {
        minimum: 2004, 
        maximum: 2013, 
        interval: 1,
        title: 'Year'
      },
      primaryYAxis: {
        minimum: 330, 
        maximum: 450, 
        interval: 30,
        title: 'Intensity (g/kWh)'
      },
      title: 'CO2 - Intensity Analysis',
      marker: { 
        visible: true, 
        width: 7, 
        height: 7, 
        isFilled: true 
      },
      emptyPointSettings: {
        mode: 'Average',
        fill: '#800000'
      }
    };
  },
  provide: {
    chart: [StepLineSeries]
  }
};
</script>
<style>
  #container {
    height: 350px;
  }
</style>

Border

Use the border property to customize the border width and color for empty points.

<template>
  <div id="app">
    <ejs-chart id="container" :title='title' :primaryXAxis='primaryXAxis' :primaryYAxis='primaryYAxis'>
      <e-series-collection>
        <e-series :dataSource='seriesData' type='StepLine' xName='x' yName='y' width=2 :emptyPointSettings='emptyPointSettings' :marker='marker'> </e-series>
      </e-series-collection>
    </ejs-chart>
  </div>
</template>
<script setup>
import { provide } from "vue";
import { ChartComponent as EjsChart, SeriesCollectionDirective as ESeriesCollection, SeriesDirective as ESeries, StepLineSeries } from "@syncfusion/ej2-vue-charts";

const seriesData = [
  { x: 2005, y: 370 },
  { x: 2006, y: 378 },
  { x: 2007, y: 416 },
  { x: 2008, y: 404 },
  { x: 2009, y: undefined },
  { x: 2010, y: 376 },
  { x: 2011, y: 365 },
  { x: 2012, y: 350 }
];
const primaryXAxis = {
  minimum: 2004, 
  maximum: 2013, 
  interval: 1,
  title: 'Year'
};
const primaryYAxis = {
  minimum: 330, 
  maximum: 450, 
  interval: 30,
  title: 'Intensity (g/kWh)'
};
const title = 'CO2 - Intensity Analysis';
const marker = { 
  visible: true, 
  width: 7, 
  height: 7, 
  isFilled: true 
};
const emptyPointSettings = {
  mode: 'Average',
  fill: '#800000',
  border: { color: '#00FFFF', width: 2 }
};

provide('chart', [StepLineSeries]);

</script>
<style>
  #container {
    height: 350px;
  }
</style>
<template>
  <div id="app">
    <ejs-chart id="container" :title='title' :primaryXAxis='primaryXAxis' :primaryYAxis='primaryYAxis'>
      <e-series-collection>
        <e-series :dataSource='seriesData' type='StepLine' xName='x' yName='y' width=2 :emptyPointSettings='emptyPointSettings' :marker='marker'> </e-series>
      </e-series-collection>
    </ejs-chart>
  </div>
</template>
<script>

import { ChartComponent, SeriesCollectionDirective, SeriesDirective, StepLineSeries } from "@syncfusion/ej2-vue-charts";

export default {
  name: "App",
  components: {
    'ejs-chart': ChartComponent,
    'e-series-collection': SeriesCollectionDirective,
    'e-series': SeriesDirective
  },
  data() {
    return {
      seriesData: [
        { x: 2005, y: 370 },
        { x: 2006, y: 378 },
        { x: 2007, y: 416 },
        { x: 2008, y: 404 },
        { x: 2009, y: undefined },
        { x: 2010, y: 376 },
        { x: 2011, y: 365 },
        { x: 2012, y: 350 }
      ],
      primaryXAxis: {
        minimum: 2004, 
        maximum: 2013, 
        interval: 1,
        title: 'Year'
      },
      primaryYAxis: {
        minimum: 330, 
        maximum: 450, 
        interval: 30,
        title: 'Intensity (g/kWh)'
      },
      title: 'CO2 - Intensity Analysis',
      marker: { 
        visible: true, 
        width: 7, 
        height: 7, 
        isFilled: true 
      },
      emptyPointSettings: {
        mode: 'Average',
        fill: '#800000',
        border: { color: '#00FFFF', width: 2 }
      }
    };
  },
  provide: {
    chart: [StepLineSeries]
  }
};
</script>
<style>
  #container {
    height: 350px;
  }
</style>

Events

Series render

The seriesRender event enables modification of series properties (for example, data, fill, or name) immediately before rendering. Use this event to adjust series appearance or to dynamically swap data sources.

<template>
  <div id="app">
    <ejs-chart id="container" :title='title' :primaryXAxis='primaryXAxis' :primaryYAxis='primaryYAxis' :seriesRender='seriesRender'>
      <e-series-collection>
        <e-series :dataSource='seriesData' type='StepLine' xName='x' yName='y' width=2> </e-series>
      </e-series-collection>
    </ejs-chart>
  </div>
</template>
<script setup>
import { provide } from "vue";
import { ChartComponent as EjsChart, SeriesCollectionDirective as ESeriesCollection, SeriesDirective as ESeries, StepLineSeries } from "@syncfusion/ej2-vue-charts";

const seriesData = [
  { x: 2005, y: 370 },
  { x: 2006, y: 378 },
  { x: 2007, y: 416 },
  { x: 2008, y: 404 },
  { x: 2009, y: 390 },
  { x: 2010, y: 376 },
  { x: 2011, y: 365 },
  { x: 2012, y: 350 }
];
const primaryXAxis = {
  minimum: 2004, 
  maximum: 2013, 
  interval: 1,
  title: 'Year'
};
const primaryYAxis = {
  minimum: 330, 
  maximum: 450, 
  interval: 30,
  title: 'Intensity (g/kWh)'
};
const title = 'CO2 - Intensity Analysis';

provide('chart', [StepLineSeries]);

const seriesRender = function (args) {
  args.fill = '#ff6347';
};

</script>
<style>
  #container {
    height: 350px;
  }
</style>
<template>
  <div id="app">
    <ejs-chart id="container" :title='title' :primaryXAxis='primaryXAxis' :primaryYAxis='primaryYAxis' :seriesRender='seriesRender'>
      <e-series-collection>
        <e-series :dataSource='seriesData' type='StepLine' xName='x' yName='y' width=2> </e-series>
      </e-series-collection>
    </ejs-chart>
  </div>
</template>
<script>

import { ChartComponent, SeriesCollectionDirective, SeriesDirective, StepLineSeries } from "@syncfusion/ej2-vue-charts";

export default {
  name: "App",
  components: {
    'ejs-chart': ChartComponent,
    'e-series-collection': SeriesCollectionDirective,
    'e-series': SeriesDirective
  },
  data() {
    return {
      seriesData: [
        { x: 2005, y: 370 },
        { x: 2006, y: 378 },
        { x: 2007, y: 416 },
        { x: 2008, y: 404 },
        { x: 2009, y: 390 },
        { x: 2010, y: 376 },
        { x: 2011, y: 365 },
        { x: 2012, y: 350 }
      ],
      primaryXAxis: {
        minimum: 2004, 
        maximum: 2013, 
        interval: 1,
        title: 'Year'
      },
      primaryYAxis: {
        minimum: 330, 
        maximum: 450, 
        interval: 30,
        title: 'Intensity (g/kWh)'
      },
      title: 'CO2 - Intensity Analysis'
    };
  },
  provide: {
    chart: [StepLineSeries]
  },
  methods: {
    seriesRender: function (args) {
      args.fill = '#ff6347';
    }
  }
};
</script>
<style>
  #container {
    height: 350px;
  }
</style>

Point render

The pointRender event provides a hook to customize each data point (for example, marker shape, border, or fill) before it is drawn. Use this to apply per-point styling rules or conditional formatting.

<template>
  <div id="app">
    <ejs-chart id="container" :title='title' :primaryXAxis='primaryXAxis' :primaryYAxis='primaryYAxis' :pointRender='pointRender'>
      <e-series-collection>
        <e-series :dataSource='seriesData' type='StepLine' xName='x' yName='y' width=2 :marker='marker'> </e-series>
      </e-series-collection>
    </ejs-chart>
  </div>
</template>
<script setup>
import { provide } from "vue";
import { ChartComponent as EjsChart, SeriesCollectionDirective as ESeriesCollection, SeriesDirective as ESeries, StepLineSeries } from "@syncfusion/ej2-vue-charts";

const seriesData = [
  { x: 2005, y: 370 },
  { x: 2006, y: 378 },
  { x: 2007, y: 416 },
  { x: 2008, y: 404 },
  { x: 2009, y: 390 },
  { x: 2010, y: 376 },
  { x: 2011, y: 365 },
  { x: 2012, y: 350 }
];
const primaryXAxis = {
  minimum: 2004, 
  maximum: 2013, 
  interval: 1,
  title: 'Year'
};
const primaryYAxis = {
  minimum: 330, 
  maximum: 450, 
  interval: 30,
  title: 'Intensity (g/kWh)'
};
const title = 'CO2 - Intensity Analysis';
const marker = { visible: true };

provide('chart', [StepLineSeries]);

const pointRender = function (args) {
  if (args.point.index % 2 !== 0) {
    args.fill = '#ff6347';
  }
  else {
    args.fill = '#009cb8';
  }
};

</script>
<style>
  #container {
    height: 350px;
  }
</style>
<template>
  <div id="app">
    <ejs-chart id="container" :title='title' :primaryXAxis='primaryXAxis' :primaryYAxis='primaryYAxis' :pointRender='pointRender'>
      <e-series-collection>
        <e-series :dataSource='seriesData' type='StepLine' xName='x' yName='y' width=2 :marker='marker'> </e-series>
      </e-series-collection>
    </ejs-chart>
  </div>
</template>
<script>

import { ChartComponent, SeriesCollectionDirective, SeriesDirective, StepLineSeries } from "@syncfusion/ej2-vue-charts";

export default {
  name: "App",
  components: {
    'ejs-chart': ChartComponent,
    'e-series-collection': SeriesCollectionDirective,
    'e-series': SeriesDirective
  },
  data() {
    return {
      seriesData: [
        { x: 2005, y: 370 },
        { x: 2006, y: 378 },
        { x: 2007, y: 416 },
        { x: 2008, y: 404 },
        { x: 2009, y: 390 },
        { x: 2010, y: 376 },
        { x: 2011, y: 365 },
        { x: 2012, y: 350 }
      ],
      primaryXAxis: {
        minimum: 2004, 
        maximum: 2013, 
        interval: 1,
        title: 'Year'
      },
      primaryYAxis: {
        minimum: 330, 
        maximum: 450, 
        interval: 30,
        title: 'Intensity (g/kWh)'
      },
      title: 'CO2 - Intensity Analysis',
      marker: { visible: true }
    };
  },
  provide: {
    chart: [StepLineSeries]
  },
  methods: {
    pointRender: function (args) {
      if (args.point.index % 2 !== 0) {
        args.fill = '#ff6347';
      }
      else {
        args.fill = '#009cb8';
      }
    }
  }
};
</script>
<style>
  #container {
    height: 350px;
  }
</style>

See also