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Spline Area Chart in Vue Charts

3 Feb 202624 minutes to read

Spline Area

To render a spline area 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 SplineArea in your chart configuration. This indicates that the data should be represented as a spline area chart, where data points are connected by smooth, curved lines (splines) instead of straight lines.

  • Inject the SplineAreaSeries module: Use the provide: { chart: [SplineAreaSeries]} method to inject the SplineAreaSeries module into your chart. This step is essential, as it ensures that the necessary functionalities for rendering spline area 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='SplineArea' 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, SplineAreaSeries, Category } from "@syncfusion/ej2-vue-charts";

const seriesData = [
  { x: 'Jan', y: -1 }, 
  { x: 'Feb', y: -1 }, 
  { x: 'Mar', y: 2 },
  { x: 'Apr', y: 8 }, 
  { x: 'May', y: 13 }, 
  { x: 'Jun', y: 18 }, 
  { x: 'Jul', y: 21 }, 
  { x: 'Aug', y: 20 }, 
  { x: 'Sep', y: 16 }, 
  { x: 'Oct', y: 10 }, 
  { x: 'Nov', y: 4 }, 
  { x: 'Dec', y: 0 }
];
const primaryXAxis = {
  valueType: 'Category',
  title: 'Month'
};
const primaryYAxis = {
  minimum: -5,
  maximum: 30, 
  interval: 5,
  title: 'Temperature in Celsius',
  labelFormat: '{value}°C'
};
const title = 'Climate Graph-2012';

provide('chart', [SplineAreaSeries, Category]);

</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='SplineArea' xName='x' yName='y'> </e-series>
            </e-series-collection>
        </ejs-chart>
    </div>
</template>
<script>

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

export default {
name: "App",
components: {
    'ejs-chart': ChartComponent,
    'e-series-collection': SeriesCollectionDirective,
    'e-series': SeriesDirective
  },
  data() {
    return {
      seriesData: [
        { x: 'Jan', y: -1 }, 
        { x: 'Feb', y: -1 }, 
        { x: 'Mar', y: 2 },
        { x: 'Apr', y: 8 }, 
        { x: 'May', y: 13 }, 
        { x: 'Jun', y: 18 }, 
        { x: 'Jul', y: 21 }, 
        { x: 'Aug', y: 20 }, 
        { x: 'Sep', y: 16 }, 
        { x: 'Oct', y: 10 }, 
        { x: 'Nov', y: 4 }, 
        { x: 'Dec', y: 0 }
      ],
      primaryXAxis: {
        valueType: 'Category',
        title: 'Month'
      },
      primaryYAxis: {
        minimum: -5, 
        maximum: 30, 
        interval: 5,
        title: 'Temperature in Celsius',
        labelFormat: '{value}°C'
      },
      title: 'Climate Graph-2012'
    };
  },
  provide: {
    chart: [SplineAreaSeries, Category]
  }
};
</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='SplineArea' 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, SplineAreaSeries, Category } from "@syncfusion/ej2-vue-charts";

const seriesData = [
  { x: 'Jan', y: -1 }, 
  { x: 'Feb', y: -1 }, 
  { x: 'Mar', y: 2 },
  { x: 'Apr', y: 8 }, 
  { x: 'May', y: 13 }, 
  { x: 'Jun', y: 18 }, 
  { x: 'Jul', y: 21 }, 
  { x: 'Aug', y: 20 }, 
  { x: 'Sep', y: 16 }, 
  { x: 'Oct', y: 10 }, 
  { x: 'Nov', y: 4 }, 
  { x: 'Dec', y: 0 }
];
const primaryXAxis = {
  valueType: 'Category',
  title: 'Month'
};
const primaryYAxis = {
  minimum: -5,
  maximum: 30, 
  interval: 5,
  title: 'Temperature in Celsius',
  labelFormat: '{value}°C'
};
const title = 'Climate Graph-2012';

provide('chart', [SplineAreaSeries, Category]);

</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='SplineArea' xName='x' yName='y'> </e-series>
            </e-series-collection>
        </ejs-chart>
    </div>
</template>
<script>

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

export default {
name: "App",
components: {
    'ejs-chart': ChartComponent,
    'e-series-collection': SeriesCollectionDirective,
    'e-series': SeriesDirective
  },
  data() {
    return {
      seriesData: [
        { x: 'Jan', y: -1 }, 
        { x: 'Feb', y: -1 }, 
        { x: 'Mar', y: 2 },
        { x: 'Apr', y: 8 }, 
        { x: 'May', y: 13 }, 
        { x: 'Jun', y: 18 }, 
        { x: 'Jul', y: 21 }, 
        { x: 'Aug', y: 20 }, 
        { x: 'Sep', y: 16 }, 
        { x: 'Oct', y: 10 }, 
        { x: 'Nov', y: 4 }, 
        { x: 'Dec', y: 0 }
      ],
      primaryXAxis: {
        valueType: 'Category',
        title: 'Month'
      },
      primaryYAxis: {
        minimum: -5, 
        maximum: 30, 
        interval: 5,
        title: 'Temperature in Celsius',
        labelFormat: '{value}°C'
      },
      title: 'Climate Graph-2012'
    };
  },
  provide: {
    chart: [SplineAreaSeries, Category]
  }
};
</script>
<style>
  #container {
    height: 350px;
  }
</style>

Series customization

The following properties can be used to customize the spline area 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='SplineArea' xName='x' yName='y' fill='blue'> </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, SplineAreaSeries, Category } from "@syncfusion/ej2-vue-charts";

const seriesData = [
  { x: 'Jan', y: -1 }, 
  { x: 'Feb', y: -1 }, 
  { x: 'Mar', y: 2 },
  { x: 'Apr', y: 8 }, 
  { x: 'May', y: 13 }, 
  { x: 'Jun', y: 18 }, 
  { x: 'Jul', y: 21 }, 
  { x: 'Aug', y: 20 }, 
  { x: 'Sep', y: 16 }, 
  { x: 'Oct', y: 10 }, 
  { x: 'Nov', y: 4 }, 
  { x: 'Dec', y: 0 }
];
const primaryXAxis = {
  valueType: 'Category',
  title: 'Month'
};
const primaryYAxis = {
  minimum: -5,
  maximum: 30, 
  interval: 5,
  title: 'Temperature in Celsius',
  labelFormat: '{value}°C'
};
const title = 'Climate Graph-2012';

provide('chart', [SplineAreaSeries, Category]);

</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='SplineArea' xName='x' yName='y' fill='blue'> </e-series>
            </e-series-collection>
        </ejs-chart>
    </div>
</template>
<script>

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

export default {
name: "App",
components: {
    'ejs-chart': ChartComponent,
    'e-series-collection': SeriesCollectionDirective,
    'e-series': SeriesDirective
  },
  data() {
    return {
      seriesData: [
        { x: 'Jan', y: -1 }, 
        { x: 'Feb', y: -1 }, 
        { x: 'Mar', y: 2 },
        { x: 'Apr', y: 8 }, 
        { x: 'May', y: 13 }, 
        { x: 'Jun', y: 18 }, 
        { x: 'Jul', y: 21 }, 
        { x: 'Aug', y: 20 }, 
        { x: 'Sep', y: 16 }, 
        { x: 'Oct', y: 10 }, 
        { x: 'Nov', y: 4 }, 
        { x: 'Dec', y: 0 }
      ],
      primaryXAxis: {
        valueType: 'Category',
        title: 'Month'
      },
      primaryYAxis: {
        minimum: -5, 
        maximum: 30, 
        interval: 5,
        title: 'Temperature in Celsius',
        labelFormat: '{value}°C'
      },
      title: 'Climate Graph-2012'
    };
  },
  provide: {
    chart: [SplineAreaSeries, Category]
  }
};
</script>
<style>
  #container {
    height: 350px;
  }
</style>

The fill property can be used to apply a gradient color to the spline area 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='SplineArea' 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, SplineAreaSeries, Category } from "@syncfusion/ej2-vue-charts";

const seriesData = [
  { x: 'Jan', y: -1 }, 
  { x: 'Feb', y: -1 }, 
  { x: 'Mar', y: 2 },
  { x: 'Apr', y: 8 }, 
  { x: 'May', y: 13 }, 
  { x: 'Jun', y: 18 }, 
  { x: 'Jul', y: 21 }, 
  { x: 'Aug', y: 20 }, 
  { x: 'Sep', y: 16 }, 
  { x: 'Oct', y: 10 }, 
  { x: 'Nov', y: 4 }, 
  { x: 'Dec', y: 0 }
];
const primaryXAxis = {
  valueType: 'Category',
  title: 'Month'
};
const primaryYAxis = {
  minimum: -5,
  maximum: 30, 
  interval: 5,
  title: 'Temperature in Celsius',
  labelFormat: '{value}°C'
};
const title = 'Climate Graph-2012';

provide('chart', [SplineAreaSeries, Category]);

</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='SplineArea' xName='x' yName='y' fill='url(#gradient)'> </e-series>
            </e-series-collection>
        </ejs-chart>
    </div>
</template>
<script>

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

export default {
name: "App",
components: {
    'ejs-chart': ChartComponent,
    'e-series-collection': SeriesCollectionDirective,
    'e-series': SeriesDirective
  },
  data() {
    return {
      seriesData: [
        { x: 'Jan', y: -1 }, 
        { x: 'Feb', y: -1 }, 
        { x: 'Mar', y: 2 },
        { x: 'Apr', y: 8 }, 
        { x: 'May', y: 13 }, 
        { x: 'Jun', y: 18 }, 
        { x: 'Jul', y: 21 }, 
        { x: 'Aug', y: 20 }, 
        { x: 'Sep', y: 16 }, 
        { x: 'Oct', y: 10 }, 
        { x: 'Nov', y: 4 }, 
        { x: 'Dec', y: 0 }
      ],
      primaryXAxis: {
        valueType: 'Category',
        title: 'Month'
      },
      primaryYAxis: {
        minimum: -5, 
        maximum: 30, 
        interval: 5,
        title: 'Temperature in Celsius',
        labelFormat: '{value}°C'
      },
      title: 'Climate Graph-2012'
    };
  },
  provide: {
    chart: [SplineAreaSeries, Category]
  }
};
</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='SplineArea' 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, SplineAreaSeries, Category } from "@syncfusion/ej2-vue-charts";

const seriesData = [
  { x: 'Jan', y: -1 }, 
  { x: 'Feb', y: -1 }, 
  { x: 'Mar', y: 2 },
  { x: 'Apr', y: 8 }, 
  { x: 'May', y: 13 }, 
  { x: 'Jun', y: 18 }, 
  { x: 'Jul', y: 21 }, 
  { x: 'Aug', y: 20 }, 
  { x: 'Sep', y: 16 }, 
  { x: 'Oct', y: 10 }, 
  { x: 'Nov', y: 4 }, 
  { x: 'Dec', y: 0 }
];
const primaryXAxis = {
  valueType: 'Category',
  title: 'Month'
};
const primaryYAxis = {
  minimum: -5,
  maximum: 30, 
  interval: 5,
  title: 'Temperature in Celsius',
  labelFormat: '{value}°C'
};
const title = 'Climate Graph-2012';

provide('chart', [SplineAreaSeries, Category]);

</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='SplineArea' xName='x' yName='y' opacity=0.5> </e-series>
            </e-series-collection>
        </ejs-chart>
    </div>
</template>
<script>

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

export default {
name: "App",
components: {
    'ejs-chart': ChartComponent,
    'e-series-collection': SeriesCollectionDirective,
    'e-series': SeriesDirective
  },
  data() {
    return {
      seriesData: [
        { x: 'Jan', y: -1 }, 
        { x: 'Feb', y: -1 }, 
        { x: 'Mar', y: 2 },
        { x: 'Apr', y: 8 }, 
        { x: 'May', y: 13 }, 
        { x: 'Jun', y: 18 }, 
        { x: 'Jul', y: 21 }, 
        { x: 'Aug', y: 20 }, 
        { x: 'Sep', y: 16 }, 
        { x: 'Oct', y: 10 }, 
        { x: 'Nov', y: 4 }, 
        { x: 'Dec', y: 0 }
      ],
      primaryXAxis: {
        valueType: 'Category',
        title: 'Month'
      },
      primaryYAxis: {
        minimum: -5, 
        maximum: 30, 
        interval: 5,
        title: 'Temperature in Celsius',
        labelFormat: '{value}°C'
      },
      title: 'Climate Graph-2012'
    };
  },
  provide: {
    chart: [SplineAreaSeries, Category]
  }
};
</script>
<style>
  #container {
    height: 350px;
  }
</style>

Border

Use the border property to configure the border width, color, and dash array of the spline area series.

<template>
  <div id="app">
    <ejs-chart id="container" :title='title' :primaryXAxis='primaryXAxis' :primaryYAxis='primaryYAxis'>
      <e-series-collection>
        <e-series :dataSource='seriesData' type='SplineArea' xName='x' yName='y' dashArray='5,5' :border='border'> </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, SplineAreaSeries, Category } from "@syncfusion/ej2-vue-charts";

const seriesData = [
  { x: 'Jan', y: -1 }, 
  { x: 'Feb', y: -1 }, 
  { x: 'Mar', y: 2 },
  { x: 'Apr', y: 8 }, 
  { x: 'May', y: 13 }, 
  { x: 'Jun', y: 18 }, 
  { x: 'Jul', y: 21 }, 
  { x: 'Aug', y: 20 }, 
  { x: 'Sep', y: 16 }, 
  { x: 'Oct', y: 10 }, 
  { x: 'Nov', y: 4 }, 
  { x: 'Dec', y: 0 }
];
const primaryXAxis = {
  valueType: 'Category',
  title: 'Month'
};
const primaryYAxis = {
  minimum: -5,
  maximum: 30, 
  interval: 5,
  title: 'Temperature in Celsius',
  labelFormat: '{value}°C'
};
const title = 'Climate Graph-2012';
const border = { 
  width: 2, 
  color: '#FFA500',
  dashArray: "5,5"
};

provide('chart', [SplineAreaSeries, Category]);

</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='SplineArea' xName='x' yName='y' dashArray='5,5' :border='border'> </e-series>
            </e-series-collection>
        </ejs-chart>
    </div>
</template>
<script>

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

export default {
name: "App",
components: {
    'ejs-chart': ChartComponent,
    'e-series-collection': SeriesCollectionDirective,
    'e-series': SeriesDirective
  },
  data() {
    return {
      seriesData: [
        { x: 'Jan', y: -1 }, 
        { x: 'Feb', y: -1 }, 
        { x: 'Mar', y: 2 },
        { x: 'Apr', y: 8 }, 
        { x: 'May', y: 13 }, 
        { x: 'Jun', y: 18 }, 
        { x: 'Jul', y: 21 }, 
        { x: 'Aug', y: 20 }, 
        { x: 'Sep', y: 16 }, 
        { x: 'Oct', y: 10 }, 
        { x: 'Nov', y: 4 }, 
        { x: 'Dec', y: 0 }
      ],
      primaryXAxis: {
        valueType: 'Category',
        title: 'Month'
      },
      primaryYAxis: {
        minimum: -5, 
        maximum: 30, 
        interval: 5,
        title: 'Temperature in Celsius',
        labelFormat: '{value}°C'
      },
      title: 'Climate Graph-2012',
      border: { 
        width: 2, 
        color: '#FFA500',
        dashArray: "5,5"
      }
    };
  },
  provide: {
    chart: [SplineAreaSeries, Category]
  }
};
</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='SplineArea' xName='x' yName='y' :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, SplineAreaSeries, Category } from "@syncfusion/ej2-vue-charts";

const seriesData = [
  { x: 'Jan', y: -1 }, 
  { x: 'Feb', y: -1 }, 
  { x: 'Mar', y: 2 },
  { x: 'Apr', y: null }, 
  { x: 'May', y: 13 }, 
  { x: 'Jun', y: 18 }, 
  { x: 'Jul', y: 21 }, 
  { x: 'Aug', y: 20 }, 
  { x: 'Sep', y: undefined }, 
  { x: 'Oct', y: 10 }, 
  { x: 'Nov', y: 4 }, 
  { x: 'Dec', y: 0 }
];
const primaryXAxis = {
  valueType: 'Category',
  title: 'Month'
};
const primaryYAxis = {
  minimum: -5,
  maximum: 30, 
  interval: 5,
  title: 'Temperature in Celsius',
  labelFormat: '{value}°C'
};
const title = 'Climate Graph-2012';
const emptyPointSettings = {
  mode: 'Average'
};

provide('chart', [SplineAreaSeries, Category]);

</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='SplineArea' xName='x' yName='y' :emptyPointSettings='emptyPointSettings'> </e-series>
            </e-series-collection>
        </ejs-chart>
    </div>
</template>
<script>

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

export default {
name: "App",
components: {
    'ejs-chart': ChartComponent,
    'e-series-collection': SeriesCollectionDirective,
    'e-series': SeriesDirective
  },
  data() {
    return {
      seriesData: [
        { x: 'Jan', y: -1 }, 
        { x: 'Feb', y: -1 }, 
        { x: 'Mar', y: 2 },
        { x: 'Apr', y: null }, 
        { x: 'May', y: 13 }, 
        { x: 'Jun', y: 18 }, 
        { x: 'Jul', y: 21 }, 
        { x: 'Aug', y: 20 }, 
        { x: 'Sep', y: undefined }, 
        { x: 'Oct', y: 10 }, 
        { x: 'Nov', y: 4 }, 
        { x: 'Dec', y: 0 }
      ],
      primaryXAxis: {
        valueType: 'Category',
        title: 'Month'
      },
      primaryYAxis: {
        minimum: -5, 
        maximum: 30, 
        interval: 5,
        title: 'Temperature in Celsius',
        labelFormat: '{value}°C'
      },
      title: 'Climate Graph-2012',
      emptyPointSettings: {
        mode: 'Average'
      }
    };
  },
  provide: {
    chart: [SplineAreaSeries, Category]
  }
};
</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='SplineArea' xName='x' yName='y' :marker='marker' :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, SplineAreaSeries, Category } from "@syncfusion/ej2-vue-charts";

const seriesData = [
  { x: 'Jan', y: -1 }, 
  { x: 'Feb', y: -1 }, 
  { x: 'Mar', y: 2 },
  { x: 'Apr', y: null }, 
  { x: 'May', y: 13 }, 
  { x: 'Jun', y: 18 }, 
  { x: 'Jul', y: 21 }, 
  { x: 'Aug', y: 20 }, 
  { x: 'Sep', y: undefined }, 
  { x: 'Oct', y: 10 }, 
  { x: 'Nov', y: 4 }, 
  { x: 'Dec', y: 0 }
];
const primaryXAxis = {
  valueType: 'Category',
  title: 'Month'
};
const primaryYAxis = {
  minimum: -5,
  maximum: 30, 
  interval: 5,
  title: 'Temperature in Celsius',
  labelFormat: '{value}°C'
};
const title = 'Climate Graph-2012';
const emptyPointSettings = {
  mode: 'Average',
  fill: 'red'
};
const marker = { 
  visible: true, 
  width: 7, 
  height: 7, 
  isFilled: true 
};

provide('chart', [SplineAreaSeries, Category]);

</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='SplineArea' xName='x' yName='y' :marker='marker' :emptyPointSettings='emptyPointSettings'> </e-series>
            </e-series-collection>
        </ejs-chart>
    </div>
</template>
<script>

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

export default {
name: "App",
components: {
    'ejs-chart': ChartComponent,
    'e-series-collection': SeriesCollectionDirective,
    'e-series': SeriesDirective
  },
  data() {
    return {
      seriesData: [
        { x: 'Jan', y: -1 }, 
        { x: 'Feb', y: -1 }, 
        { x: 'Mar', y: 2 },
        { x: 'Apr', y: null }, 
        { x: 'May', y: 13 }, 
        { x: 'Jun', y: 18 }, 
        { x: 'Jul', y: 21 }, 
        { x: 'Aug', y: 20 }, 
        { x: 'Sep', y: undefined }, 
        { x: 'Oct', y: 10 }, 
        { x: 'Nov', y: 4 }, 
        { x: 'Dec', y: 0 }
      ],
      primaryXAxis: {
        valueType: 'Category',
        title: 'Month'
      },
      primaryYAxis: {
        minimum: -5, 
        maximum: 30, 
        interval: 5,
        title: 'Temperature in Celsius',
        labelFormat: '{value}°C'
      },
      title: 'Climate Graph-2012',
      emptyPointSettings: {
        mode: 'Average',
        fill: 'red'
      },
      marker: { 
        visible: true, 
        width: 7, 
        height: 7, 
        isFilled: true 
      }
    };
  },
  provide: {
    chart: [SplineAreaSeries, Category]
  }
};
</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='SplineArea' xName='x' yName='y' :marker='marker' :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, SplineAreaSeries, Category } from "@syncfusion/ej2-vue-charts";

const seriesData = [
  { x: 'Jan', y: -1 }, 
  { x: 'Feb', y: -1 }, 
  { x: 'Mar', y: 2 },
  { x: 'Apr', y: null }, 
  { x: 'May', y: 13 }, 
  { x: 'Jun', y: 18 }, 
  { x: 'Jul', y: 21 }, 
  { x: 'Aug', y: 20 }, 
  { x: 'Sep', y: undefined }, 
  { x: 'Oct', y: 10 }, 
  { x: 'Nov', y: 4 }, 
  { x: 'Dec', y: 0 }
];
const primaryXAxis = {
  valueType: 'Category',
  title: 'Month'
};
const primaryYAxis = {
  minimum: -5,
  maximum: 30, 
  interval: 5,
  title: 'Temperature in Celsius',
  labelFormat: '{value}°C'
};
const title = 'Climate Graph-2012';
const emptyPointSettings = {
  mode: 'Average',
  fill: 'red',
  border: { 
    width: 2, 
    color: 'green' 
  }
};
const marker = { 
  visible: true, 
  width: 7, 
  height: 7, 
  isFilled: true 
};

provide('chart', [SplineAreaSeries, Category]);

</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='SplineArea' xName='x' yName='y' :marker='marker' :emptyPointSettings='emptyPointSettings'> </e-series>
            </e-series-collection>
        </ejs-chart>
    </div>
</template>
<script>

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

export default {
name: "App",
components: {
    'ejs-chart': ChartComponent,
    'e-series-collection': SeriesCollectionDirective,
    'e-series': SeriesDirective
  },
  data() {
    return {
      seriesData: [
        { x: 'Jan', y: -1 }, 
        { x: 'Feb', y: -1 }, 
        { x: 'Mar', y: 2 },
        { x: 'Apr', y: null }, 
        { x: 'May', y: 13 }, 
        { x: 'Jun', y: 18 }, 
        { x: 'Jul', y: 21 }, 
        { x: 'Aug', y: 20 }, 
        { x: 'Sep', y: undefined }, 
        { x: 'Oct', y: 10 }, 
        { x: 'Nov', y: 4 }, 
        { x: 'Dec', y: 0 }
      ],
      primaryXAxis: {
        valueType: 'Category',
        title: 'Month'
      },
      primaryYAxis: {
        minimum: -5, 
        maximum: 30, 
        interval: 5,
        title: 'Temperature in Celsius',
        labelFormat: '{value}°C'
      },
      title: 'Climate Graph-2012',
      emptyPointSettings: {
        mode: 'Average',
        fill: 'red',
        border: { 
          width: 2, 
          color: 'green' 
        }
      },
      marker: { 
        visible: true, 
        width: 7, 
        height: 7, 
        isFilled: true 
      }
    };
  },
  provide: {
    chart: [SplineAreaSeries, Category]
  }
};
</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='SplineArea' 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, SplineAreaSeries, Category } from "@syncfusion/ej2-vue-charts";

const seriesData = [
  { x: 'Jan', y: -1 }, 
  { x: 'Feb', y: -1 }, 
  { x: 'Mar', y: 2 },
  { x: 'Apr', y: 8 }, 
  { x: 'May', y: 13 }, 
  { x: 'Jun', y: 18 }, 
  { x: 'Jul', y: 21 }, 
  { x: 'Aug', y: 20 }, 
  { x: 'Sep', y: 16 }, 
  { x: 'Oct', y: 10 }, 
  { x: 'Nov', y: 4 }, 
  { x: 'Dec', y: 0 }
];
const primaryXAxis = {
  valueType: 'Category',
  title: 'Month'
};
const primaryYAxis = {
  minimum: -5,
  maximum: 30, 
  interval: 5,
  title: 'Temperature in Celsius',
  labelFormat: '{value}°C'
};
const title = 'Climate Graph-2012';

provide('chart', [SplineAreaSeries, Category]);

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='SplineArea' xName='x' yName='y'> </e-series>
            </e-series-collection>
        </ejs-chart>
    </div>
</template>
<script>

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

export default {
name: "App",
components: {
    'ejs-chart': ChartComponent,
    'e-series-collection': SeriesCollectionDirective,
    'e-series': SeriesDirective
  },
  data() {
    return {
      seriesData: [
        { x: 'Jan', y: -1 }, 
        { x: 'Feb', y: -1 }, 
        { x: 'Mar', y: 2 },
        { x: 'Apr', y: 8 }, 
        { x: 'May', y: 13 }, 
        { x: 'Jun', y: 18 }, 
        { x: 'Jul', y: 21 }, 
        { x: 'Aug', y: 20 }, 
        { x: 'Sep', y: 16 }, 
        { x: 'Oct', y: 10 }, 
        { x: 'Nov', y: 4 }, 
        { x: 'Dec', y: 0 }
      ],
      primaryXAxis: {
        valueType: 'Category',
        title: 'Month'
      },
      primaryYAxis: {
        minimum: -5, 
        maximum: 30, 
        interval: 5,
        title: 'Temperature in Celsius',
        labelFormat: '{value}°C'
      },
      title: 'Climate Graph-2012'
    };
  },
  provide: {
    chart: [SplineAreaSeries, Category]
  },
  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='SplineArea' xName='x' yName='y' :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, SplineAreaSeries, Category } from "@syncfusion/ej2-vue-charts";

const seriesData = [
  { x: 'Jan', y: -1 }, 
  { x: 'Feb', y: -1 }, 
  { x: 'Mar', y: 2 },
  { x: 'Apr', y: 8 }, 
  { x: 'May', y: 13 }, 
  { x: 'Jun', y: 18 }, 
  { x: 'Jul', y: 21 }, 
  { x: 'Aug', y: 20 }, 
  { x: 'Sep', y: 16 }, 
  { x: 'Oct', y: 10 }, 
  { x: 'Nov', y: 4 }, 
  { x: 'Dec', y: 0 }
];
const primaryXAxis = {
  valueType: 'Category',
  title: 'Month'
};
const primaryYAxis = {
  minimum: -5,
  maximum: 30, 
  interval: 5,
  title: 'Temperature in Celsius',
  labelFormat: '{value}°C'
};
const title = 'Climate Graph-2012';
const marker = { 
  visible: true, 
  isFilled: true, 
  width: 7, 
  height: 7 
};

provide('chart', [SplineAreaSeries, Category]);

const pointRender = function (args) {
  if (args.point.y < 10) {
      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='SplineArea' xName='x' yName='y' :marker='marker'> </e-series>
            </e-series-collection>
        </ejs-chart>
    </div>
</template>
<script>

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

export default {
name: "App",
components: {
    'ejs-chart': ChartComponent,
    'e-series-collection': SeriesCollectionDirective,
    'e-series': SeriesDirective
  },
  data() {
    return {
      seriesData: [
        { x: 'Jan', y: -1 }, 
        { x: 'Feb', y: -1 }, 
        { x: 'Mar', y: 2 },
        { x: 'Apr', y: 8 }, 
        { x: 'May', y: 13 }, 
        { x: 'Jun', y: 18 }, 
        { x: 'Jul', y: 21 }, 
        { x: 'Aug', y: 20 }, 
        { x: 'Sep', y: 16 }, 
        { x: 'Oct', y: 10 }, 
        { x: 'Nov', y: 4 }, 
        { x: 'Dec', y: 0 }
      ],
      primaryXAxis: {
        valueType: 'Category',
        title: 'Month'
      },
      primaryYAxis: {
        minimum: -5, 
        maximum: 30, 
        interval: 5,
        title: 'Temperature in Celsius',
        labelFormat: '{value}°C'
      },
      title: 'Climate Graph-2012',
      marker: { 
        visible: true, 
        isFilled: true, 
        width: 7, 
        height: 7 
      }
    };
  },
  provide: {
    chart: [SplineAreaSeries, Category]
  },
  methods: {
    pointRender: function (args) {
      if (args.point.y < 10) {
          args.fill = '#ff6347';
      }
      else {
          args.fill = '#009cb8';
      }
    }
  }
};
</script>
<style>
  #container {
    height: 350px;
  }
</style>

See also