Data markers in Vue Chart component

13 Jun 202424 minutes to read

Data markers are used to provide information about the data points in the series. You can add a shape to adorn
each data point.

Marker

Markers can be added to points by enabling the visible option of the marker property. By default, distinct markers will be enabled for each series in the chart.

Composition API (~/src/App.vue)
Options API (~/src/App.vue)
<template>
    <div id="app">
         <ejs-chart id="container" :title='title' :primaryXAxis='primaryXAxis'>
            <e-series-collection>
                <e-series :dataSource='seriesData' type='Line' xName='x' yName='y' name='December 2007'
                :marker='marker'> </e-series>
                <e-series :dataSource='seriesData' type='Line' xName='x' yName='y1' name='December 2008'
                :marker='marker'> </e-series>
            </e-series-collection>
        </ejs-chart>
    </div>
</template>
<script setup>
import { provide } from "vue";

import { ChartComponent as EjsChart, LineSeries, Category,
  SeriesCollectionDirective as ESeriesCollection, SeriesDirective as ESeries
 } from "@syncfusion/ej2-vue-charts";

const seriesData = [
        { x: 'WW', y: 12, y1: 22, y2: 38.3, y3: 50 },
        { x: 'EU', y: 9.9, y1: 26, y2: 45.2, y3: 63.6 },
        { x: 'APAC', y: 4.4, y1: 9.3, y2: 18.2, y3: 20.9 },
        { x: 'LATAM', y: 6.4, y1: 28, y2: 46.7, y3: 65.1 },
        { x: 'MEA', y: 30, y1: 45.7, y2: 61.5, y3: 73 },
        { x: 'NA', y: 25.3, y1: 35.9, y2: 64, y3: 81.4 }
        ];

const primaryXAxis = {
    valueType: 'Category', interval: 1
  };

const marker = {
        visible: true,
            };

const title = "FB Penetration of Internet Audience";

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

</script>
<style>
 #container {
   height: 350px;
 }
</style>
<template>
    <div id="app">
         <ejs-chart id="container" :title='title' :primaryXAxis='primaryXAxis'>
            <e-series-collection>
                <e-series :dataSource='seriesData' type='Line' xName='x' yName='y' name='December 2007'
                :marker='marker'> </e-series>
                <e-series :dataSource='seriesData' type='Line' xName='x' yName='y1' name='December 2008'
                :marker='marker'> </e-series>
            </e-series-collection>
        </ejs-chart>
    </div>
</template>
<script>

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

export default {
name: "App",
components: {
"ejs-chart":ChartComponent,
"e-series-collection":SeriesCollectionDirective,
"e-series":SeriesDirective,

},

  data() {
    return {
      seriesData: [
              { x: 'WW', y: 12, y1: 22, y2: 38.3, y3: 50 },
              { x: 'EU', y: 9.9, y1: 26, y2: 45.2, y3: 63.6 },
              { x: 'APAC', y: 4.4, y1: 9.3, y2: 18.2, y3: 20.9 },
              { x: 'LATAM', y: 6.4, y1: 28, y2: 46.7, y3: 65.1 },
              { x: 'MEA', y: 30, y1: 45.7, y2: 61.5, y3: 73 },
              { x: 'NA', y: 25.3, y1: 35.9, y2: 64, y3: 81.4 }
              ],
        primaryXAxis: {
            valueType: 'Category', interval: 1
        },
       marker: {
            visible: true,
                },
      title: "FB Penetration of Internet Audience"
    };
  },
  provide: {
    chart: [LineSeries, Category]
  }
};
</script>
<style>
 #container {
   height: 350px;
 }
</style>

Shape

Markers can be assigned with different shapes such as Rectangle, Circle, Diamond, etc. using the shape property.

Composition API (~/src/App.vue)
Options API (~/src/App.vue)
<template>
    <div id="app">
         <ejs-chart id="container" :title='title' :primaryXAxis='primaryXAxis'>
            <e-series-collection>
                <e-series :dataSource='seriesData' type='Line' xName='x' yName='y' name='December 2007'
                :marker='marker'> </e-series>
            </e-series-collection>
        </ejs-chart>
    </div>
</template>
<script setup>
import { provide } from "vue";

import { ChartComponent as EjsChart, LineSeries, Category,
  SeriesCollectionDirective as ESeriesCollection, SeriesDirective as ESeries
 } from "@syncfusion/ej2-vue-charts";

const seriesData = [
        { x: 'WW', y: 12, y1: 22, y2: 38.3, y3: 50 },
        { x: 'EU', y: 9.9, y1: 26, y2: 45.2, y3: 63.6 },
        { x: 'APAC', y: 4.4, y1: 9.3, y2: 18.2, y3: 20.9 },
        { x: 'LATAM', y: 6.4, y1: 28, y2: 46.7, y3: 65.1 },
        { x: 'MEA', y: 30, y1: 45.7, y2: 61.5, y3: 73 },
        { x: 'NA', y: 25.3, y1: 35.9, y2: 64, y3: 81.4 }
        ];

const primaryXAxis = {
    valueType: 'Category', interval: 1
  };

const marker = {
        visible: true, width: 10, height: 10, shape: 'Diamond'
            };

const title = "FB Penetration of Internet Audience";

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

</script>
<style>
 #container {
   height: 350px;
 }
</style>
<template>
    <div id="app">
         <ejs-chart id="container" :title='title' :primaryXAxis='primaryXAxis'>
            <e-series-collection>
                <e-series :dataSource='seriesData' type='Line' xName='x' yName='y' name='December 2007'
                :marker='marker'> </e-series>
            </e-series-collection>
        </ejs-chart>
    </div>
</template>
<script>

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

export default {
name: "App",
components: {
"ejs-chart":ChartComponent,
"e-series-collection":SeriesCollectionDirective,
"e-series":SeriesDirective,

},

  data() {
    return {
      seriesData: [
              { x: 'WW', y: 12, y1: 22, y2: 38.3, y3: 50 },
              { x: 'EU', y: 9.9, y1: 26, y2: 45.2, y3: 63.6 },
              { x: 'APAC', y: 4.4, y1: 9.3, y2: 18.2, y3: 20.9 },
              { x: 'LATAM', y: 6.4, y1: 28, y2: 46.7, y3: 65.1 },
              { x: 'MEA', y: 30, y1: 45.7, y2: 61.5, y3: 73 },
              { x: 'NA', y: 25.3, y1: 35.9, y2: 64, y3: 81.4 }
              ],
        primaryXAxis: {
            valueType: 'Category', interval: 1
        },
       marker: {
           visible: true, width: 10, height: 10, shape: 'Diamond'
                },
      title: "FB Penetration of Internet Audience"
    };
  },
  provide: {
    chart: [LineSeries, Category]
  }
};
</script>
<style>
 #container {
   height: 350px;
 }
</style>

Note : To know more about the marker shape type refer the shape.

Images

Apart from the shapes, you can also add custom images to mark the data point using the
imageUrl property.

Composition API (~/src/App.vue)
Options API (~/src/App.vue)
<template>
    <div id="app">
         <ejs-chart id="container" :title='title' :primaryXAxis='primaryXAxis'>
            <e-series-collection>
                <e-series :dataSource='seriesData' type='Line' xName='x' yName='y' name='December 2007'
                :marker='marker'> </e-series>
            </e-series-collection>
        </ejs-chart>
    </div>
</template>
<script setup>
import { provide } from "vue";

import { ChartComponent as EjsChart, LineSeries, Category, SeriesCollectionDirective as ESeriesCollection,
  SeriesDirective as ESeries
 } from "@syncfusion/ej2-vue-charts";

const seriesData = [
        { x: 'WW', y: 12, y1: 22, y2: 38.3, y3: 50 },
        { x: 'EU', y: 9.9, y1: 26, y2: 45.2, y3: 63.6 },
        { x: 'APAC', y: 4.4, y1: 9.3, y2: 18.2, y3: 20.9 },
        { x: 'LATAM', y: 6.4, y1: 28, y2: 46.7, y3: 65.1 },
        { x: 'MEA', y: 30, y1: 45.7, y2: 61.5, y3: 73 },
        { x: 'NA', y: 25.3, y1: 35.9, y2: 64, y3: 81.4 }
        ];

const primaryXAxis = {
    valueType: 'Category', interval: 1
  };

const marker = {
        visible: true, width: 10, height: 10, shape: 'Image',
        imageUrl:'./sun_annotation.png'
            };

const title = "FB Penetration of Internet Audience";

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

</script>
<style>
 #container {
   height: 350px;
 }
</style>
<template>
    <div id="app">
         <ejs-chart id="container" :title='title' :primaryXAxis='primaryXAxis'>
            <e-series-collection>
                <e-series :dataSource='seriesData' type='Line' xName='x' yName='y' name='December 2007'
                :marker='marker'> </e-series>
            </e-series-collection>
        </ejs-chart>
    </div>
</template>
<script>

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

export default {
name: "App",
components: {
"ejs-chart":ChartComponent,
"e-series-collection":SeriesCollectionDirective,
"e-series":SeriesDirective,

},

  data() {
    return {
      seriesData: [
              { x: 'WW', y: 12, y1: 22, y2: 38.3, y3: 50 },
              { x: 'EU', y: 9.9, y1: 26, y2: 45.2, y3: 63.6 },
              { x: 'APAC', y: 4.4, y1: 9.3, y2: 18.2, y3: 20.9 },
              { x: 'LATAM', y: 6.4, y1: 28, y2: 46.7, y3: 65.1 },
              { x: 'MEA', y: 30, y1: 45.7, y2: 61.5, y3: 73 },
              { x: 'NA', y: 25.3, y1: 35.9, y2: 64, y3: 81.4 }
              ],
        primaryXAxis: {
            valueType: 'Category', interval: 1
        },
       marker: {
           visible: true,
           width: 10, height: 10, shape: 'Image',
           imageUrl:'./sun_annotation.png'
                },
      title: "FB Penetration of Internet Audience"
    };
  },
  provide: {
    chart: [LineSeries, Category]
  }
};
</script>
<style>
 #container {
   height: 350px;
 }
</style>

Customization

Marker’s color and border can be customized using fill and border properties.

Composition API (~/src/App.vue)
Options API (~/src/App.vue)
<template>
    <div id="app">
         <ejs-chart id="container" :title='title' :primaryXAxis='primaryXAxis'>
            <e-series-collection>
                <e-series :dataSource='seriesData' type='Line' xName='x' yName='y' name='December 2007'
                :marker='marker'> </e-series>
            </e-series-collection>
        </ejs-chart>
    </div>
</template>
<script setup>
import { provide } from "vue";

import { ChartComponent as EjsChart, LineSeries, Category, SeriesCollectionDirective as ESeriesCollection,
  SeriesDirective as ESeries
 } from "@syncfusion/ej2-vue-charts";

const seriesData = [
        { x: 'WW', y: 12, y1: 22, y2: 38.3, y3: 50 },
        { x: 'EU', y: 9.9, y1: 26, y2: 45.2, y3: 63.6 },
        { x: 'APAC', y: 4.4, y1: 9.3, y2: 18.2, y3: 20.9 },
        { x: 'LATAM', y: 6.4, y1: 28, y2: 46.7, y3: 65.1 },
        { x: 'MEA', y: 30, y1: 45.7, y2: 61.5, y3: 73 },
        { x: 'NA', y: 25.3, y1: 35.9, y2: 64, y3: 81.4 }
        ];

const primaryXAxis = {
    valueType: 'Category', interval: 1
  };

const marker = {
        visible: true, fill: 'Red', height: 10, width: 10,
        border:{width: 2, color: 'blue'}
            };

const title = "FB Penetration of Internet Audience";

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

</script>
<style>
 #container {
   height: 350px;
 }
</style>
<template>
    <div id="app">
         <ejs-chart id="container" :title='title' :primaryXAxis='primaryXAxis'>
            <e-series-collection>
                <e-series :dataSource='seriesData' type='Line' xName='x' yName='y' name='December 2007'
                :marker='marker'> </e-series>
            </e-series-collection>
        </ejs-chart>
    </div>
</template>
<script>

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

export default {
name: "App",
components: {
"ejs-chart":ChartComponent,
"e-series-collection":SeriesCollectionDirective,
"e-series":SeriesDirective,

},

  data() {
    return {
      seriesData: [
              { x: 'WW', y: 12, y1: 22, y2: 38.3, y3: 50 },
              { x: 'EU', y: 9.9, y1: 26, y2: 45.2, y3: 63.6 },
              { x: 'APAC', y: 4.4, y1: 9.3, y2: 18.2, y3: 20.9 },
              { x: 'LATAM', y: 6.4, y1: 28, y2: 46.7, y3: 65.1 },
              { x: 'MEA', y: 30, y1: 45.7, y2: 61.5, y3: 73 },
              { x: 'NA', y: 25.3, y1: 35.9, y2: 64, y3: 81.4 }
              ],
        primaryXAxis: {
            valueType: 'Category', interval: 1
        },
       marker: { visible: true,  fill: 'Red', height: 10, width: 10,
                    border:{width: 2, color: 'blue'} },
      title: "FB Penetration of Internet Audience"
    };
  },
  provide: {
    chart: [LineSeries, Category]
  }
};
</script>
<style>
 #container {
   height: 350px;
 }
</style>

Customizing specific point

You can also customize the specific marker and label using pointRender event. The pointRender event allows you to change the shape, color and border for a point.

Composition API (~/src/App.vue)
Options API (~/src/App.vue)
<template>
    <div id="app">
         <ejs-chart id="container" :title='title' :primaryXAxis='primaryXAxis' :pointRender='pointRender'>
            <e-series-collection>
                <e-series :dataSource='seriesData' type='Line' xName='x' yName='y' name='December 2007'
                :marker='marker'> </e-series>
            </e-series-collection>
        </ejs-chart>
    </div>
</template>
<script setup>
import { provide } from "vue";

import { ChartComponent as EjsChart, LineSeries, Category,
  SeriesCollectionDirective as ESeriesCollection, SeriesDirective as ESeries
 } from "@syncfusion/ej2-vue-charts";

 const seriesData = [
        { x: 'WW', y: 12, y1: 22, y2: 38.3, y3: 50 },
        { x: 'EU', y: 9.9, y1: 26, y2: 45.2, y3: 63.6 },
        { x: 'APAC', y: 4.4, y1: 9.3, y2: 18.2, y3: 20.9 },
        { x: 'LATAM', y: 6.4, y1: 28, y2: 46.7, y3: 65.1 },
        { x: 'MEA', y: 30, y1: 45.7, y2: 61.5, y3: 73 },
        { x: 'NA', y: 25.3, y1: 35.9, y2: 64, y3: 81.4 }
        ];

const primaryXAxis = {
    valueType: 'Category', interval: 1
  };

const marker = {
        visible: true, height: 10, width: 10
            };

const title = "FB Penetration of Internet Audience";

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

const pointRender = (args) => {
    if(args.point.index === 3) {
        args.fill = 'red';
    }
};

</script>
<style>
 #container {
   height: 350px;
 }
</style>
<template>
    <div id="app">
         <ejs-chart id="container" :title='title' :primaryXAxis='primaryXAxis' :pointRender='pointRender'>
            <e-series-collection>
                <e-series :dataSource='seriesData' type='Line' xName='x' yName='y' name='December 2007'
                :marker='marker'> </e-series>
            </e-series-collection>
        </ejs-chart>
    </div>
</template>
<script>

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

export default {
name: "App",
components: {
"ejs-chart":ChartComponent,
"e-series-collection":SeriesCollectionDirective,
"e-series":SeriesDirective,

},

  data() {
    return {
      seriesData: [
              { x: 'WW', y: 12, y1: 22, y2: 38.3, y3: 50 },
              { x: 'EU', y: 9.9, y1: 26, y2: 45.2, y3: 63.6 },
              { x: 'APAC', y: 4.4, y1: 9.3, y2: 18.2, y3: 20.9 },
              { x: 'LATAM', y: 6.4, y1: 28, y2: 46.7, y3: 65.1 },
              { x: 'MEA', y: 30, y1: 45.7, y2: 61.5, y3: 73 },
              { x: 'NA', y: 25.3, y1: 35.9, y2: 64, y3: 81.4 }
              ],
        primaryXAxis: {
            valueType: 'Category', interval: 1
        },
       marker: { visible: true, height: 10, width: 10 },
      title: "FB Penetration of Internet Audience"
    };
  },
  provide: {
    chart: [LineSeries, Category]
  },
   methods: {
      pointRender: function(args) {
      if(args.point.index === 3) {
         args.fill = 'red'
        }
  }
   }
};
</script>
<style>
 #container {
   height: 350px;
 }
</style>

Fill marker with series color

Marker can be filled with the series color by setting the isFilled property to true.

Composition API (~/src/App.vue)
Options API (~/src/App.vue)
<template>
    <div id="app">
         <ejs-chart id="container" :title='title' :primaryXAxis='primaryXAxis' :pointRender='pointRender'>
            <e-series-collection>
                <e-series :dataSource='seriesData' type='Line' xName='x' yName='y' name='December 2007'
                :marker='marker'> </e-series>
            </e-series-collection>
        </ejs-chart>
    </div>
</template>
<script setup>
import { provide } from "vue";

import { ChartComponent as EjsChart, LineSeries, Category,
  SeriesCollectionDirective as ESeriesCollection, SeriesDirective as ESeries
 } from "@syncfusion/ej2-vue-charts";

const seriesData = [
        { x: 'WW', y: 12, y1: 22, y2: 38.3, y3: 50 },
        { x: 'EU', y: 9.9, y1: 26, y2: 45.2, y3: 63.6 },
        { x: 'APAC', y: 4.4, y1: 9.3, y2: 18.2, y3: 20.9 },
        { x: 'LATAM', y: 6.4, y1: 28, y2: 46.7, y3: 65.1 },
        { x: 'MEA', y: 30, y1: 45.7, y2: 61.5, y3: 73 },
        { x: 'NA', y: 25.3, y1: 35.9, y2: 64, y3: 81.4 }
        ];

const primaryXAxis = {
    valueType: 'Category', interval: 1
  };

const marker = {
        visible: true, height: 10, width: 10, isFilled: true
            };

const title = "FB Penetration of Internet Audience";

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

</script>
<style>
 #container {
   height: 350px;
 }
</style>
<template>
    <div id="app">
         <ejs-chart id="container" :title='title' :primaryXAxis='primaryXAxis' :pointRender='pointRender'>
            <e-series-collection>
                <e-series :dataSource='seriesData' type='Line' xName='x' yName='y' name='December 2007'
                :marker='marker'> </e-series>
            </e-series-collection>
        </ejs-chart>
    </div>
</template>
<script>

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

export default {
name: "App",
components: {
"ejs-chart":ChartComponent,
"e-series-collection":SeriesCollectionDirective,
"e-series":SeriesDirective,

},

  data() {
    return {
      seriesData: [
              { x: 'WW', y: 12, y1: 22, y2: 38.3, y3: 50 },
              { x: 'EU', y: 9.9, y1: 26, y2: 45.2, y3: 63.6 },
              { x: 'APAC', y: 4.4, y1: 9.3, y2: 18.2, y3: 20.9 },
              { x: 'LATAM', y: 6.4, y1: 28, y2: 46.7, y3: 65.1 },
              { x: 'MEA', y: 30, y1: 45.7, y2: 61.5, y3: 73 },
              { x: 'NA', y: 25.3, y1: 35.9, y2: 64, y3: 81.4 }
              ],
        primaryXAxis: {
            valueType: 'Category', interval: 1
        },
       marker: { visible: true, height: 10, width: 10 , isFilled: true},
      title: "FB Penetration of Internet Audience"
    };
  },
  provide: {
    chart: [LineSeries, Category]
  },
};
</script>
<style>
 #container {
   height: 350px;
 }
</style>