Data label can be added to a chart series by enabling the visible
option in the dataLabel. By default, the labels will arrange smartly without overlapping.
<template>
<div id="app">
<ejs-chart id= "container" :title='title' :primaryXAxis='primaryXAxis'>
<e-series-collection>
<e-series :dataSource='seriesData' type='Column' xName='x' yName='y' name='Warmest' :marker='marker'></e-series>
</e-series-collection>
</ejs-chart>
</div>
</template>
<script>
import Vue from "vue";
import { ChartPlugin, ColumnSeries, Category, DataLabel } from "@syncfusion/ej2-vue-charts";
Vue.use(ChartPlugin);
export default {
data() {
return {
seriesData: [
{ x: 'Jan', y: -7.1 }, { x: 'Feb', y: -3.7 },
{ x: 'Mar', y: 2 }, { x: 'Apr', y: 6.3 },
{ x: 'May', y: 13.3 }, { x: 'Jun', y: 18.0 },
{ x: 'Jul', y: 19.8 }, { x: 'Aug', y: 18.1 },
{ x: 'Sep', y: 13.1 }, { x: 'Oct', y: 4.1 },
{ x: 'Nov', y: -3.8 }, { x: 'Dec', y: -6.8 }
],
primaryXAxis: {
valueType: 'Category'
},
marker: {
//Data label for chart series
dataLabel: { visible: true }
},
title: "Alaska Weather Statistics - 2016"
};
},
provide: {
chart: [ColumnSeries, Category, DataLabel]
}
};
</script>
<style>
#container {
height: 350px;
}
</style>
Note: To use datalabel feature, we need to inject DataLabel
into the provide
.
Using position
property, you can place the label either on
Top
, Middle
,Bottom
or Outer
(outer is applicable for column and bar type series).
<template>
<div id="app">
<ejs-chart id= "container" :title='title' :primaryXAxis='primaryXAxis'>
<e-series-collection>
<e-series :dataSource='seriesData' type='Column' xName='x' yName='y' name='Warmest' :marker='marker'> </e-series>
</e-series-collection>
</ejs-chart>
</div>
</template>
<script>
import Vue from "vue";
import { ChartPlugin, ColumnSeries, Category, DataLabel } from "@syncfusion/ej2-vue-charts";
Vue.use(ChartPlugin);
export default {
data() {
return {
seriesData: [
{ x: 'Jan', y: -7.1 }, { x: 'Feb', y: -3.7 },
{ x: 'Mar', y: 2 }, { x: 'Apr', y: 6.3 },
{ x: 'May', y: 13.3 }, { x: 'Jun', y: 18.0 },
{ x: 'Jul', y: 19.8 }, { x: 'Aug', y: 18.1 },
{ x: 'Sep', y: 13.1 }, { x: 'Oct', y: 4.1 },
{ x: 'Nov', y: -3.8 }, { x: 'Dec', y: -6.8 }
],
primaryXAxis: {
valueType: 'Category'
},
marker: {
dataLabel: { visible: true, position: 'Middle' }
},
title: "Alaska Weather Statistics - 2016"
};
},
provide: {
chart: [ColumnSeries, Category, DataLabel]
}
};
</script>
<style>
#container {
height: 350px;
}
</style>
Note: The position Outer
is applicable for column and bar type series.
Label content can be formatted by using the template option. Inside the template, you can add the placeholder text
${point.x}
and ${point.y}
to display corresponding data points x & y value.
Using template
property, you can set data label template
in chart.
<template>
<div id="app">
<ejs-chart id= "container" :title='title' :primaryXAxis='primaryXAxis'>
<e-series-collection>
<e-series :dataSource='seriesData' type='Column' xName='x' yName='y' name='Warmest' :marker='marker'> </e-series>
</e-series-collection>
</ejs-chart>
</div>
</template>
<script>
import Vue from "vue";
import { ChartPlugin, ColumnSeries, Category, DataLabel } from "@syncfusion/ej2-vue-charts";
let contentVue = Vue.component("contentTemplate", {
template: `<div><div>{{data.point.x}}</div><div>{{data.point.y}}</div></div>`,
data() {
return {
data: {}
};
}
});
let contentTemplate = function() {
return { template: contentVue };
};
Vue.use(ChartPlugin);
export default {
data() {
return {
seriesData: [
{ x: 'Jan', y: -7.1 }, { x: 'Feb', y: -3.7 },
{ x: 'Mar', y: 2 }, { x: 'Apr', y: 6.3 },
{ x: 'May', y: 13.3 }, { x: 'Jun', y: 18.0 },
{ x: 'Jul', y: 19.8 }, { x: 'Aug', y: 18.1 },
{ x: 'Sep', y: 13.1 }, { x: 'Oct', y: 4.1 },
{ x: 'Nov', y: -3.8 }, { x: 'Dec', y: -6.8 }
],
primaryXAxis: {
valueType: 'Category'
},
marker: { dataLabel: { visible: true, position: 'Middle',
template: contentTemplate } },
title: "Alaska Weather Statistics - 2016"
};
},
provide: {
chart: [ColumnSeries, Category, DataLabel]
}
};
</script>
<style>
#container {
height: 350px;
}
</style>
Text from the data source can be mapped using name
property.
<template>
<div id="app">
<ejs-chart id= "container" :title='title' :primaryXAxis='primaryXAxis'>
<e-series-collection>
<e-series :dataSource='seriesData' type='Column' xName='x' yName='y' name='Warmest' :marker='marker'> </e-series>
</e-series-collection>
</ejs-chart>
</div>
</template>
<script>
import Vue from "vue";
import { ChartPlugin, ColumnSeries, Category, DataLabel } from "@syncfusion/ej2-vue-charts";
Vue.use(ChartPlugin);
export default {
data() {
return {
seriesData:[{ x: 'Jan', y: 12, text: 'January : 12°C' }, { x: 'Feb', y: 8, text: 'February : 8°C' },
{ x: 'Mar', y: 11, text: 'March : 11°C' }, { x: 'Apr', y: 6, text: 'April : 6°C' }],
primaryXAxis: {
valueType: 'Category'
},
marker: { dataLabel: { visible: true, name: 'text'} },
title: "Alaska Weather Statistics - 2016"
};
},
provide: {
chart: [ColumnSeries, Category, DataLabel]
}
};
</script>
<style>
#container {
height: 350px;
}
</style>
margin
for data label can be applied to using left
, right
, bottom
and top
properties.
<template>
<div id="app">
<ejs-chart id= "container" :title='title' :primaryXAxis='primaryXAxis'>
<e-series-collection>
<e-series :dataSource='seriesData' type='Column' xName='x' yName='y' name='Warmest' :marker='marker'> </e-series>
</e-series-collection>
</ejs-chart>
</div>
</template>
<script>
import Vue from "vue";
import { ChartPlugin, ColumnSeries, Category, DataLabel } from "@syncfusion/ej2-vue-charts";
Vue.use(ChartPlugin);
export default {
data() {
return {
seriesData: [
{ x: 'Jan', y: -7.1 }, { x: 'Feb', y: -3.7 },
{ x: 'Mar', y: 2 }, { x: 'Apr', y: 6.3 },
{ x: 'May', y: 13.3 }, { x: 'Jun', y: 18.0 },
{ x: 'Jul', y: 19.8 }, { x: 'Aug', y: 18.1 },
{ x: 'Sep', y: 13.1 }, { x: 'Oct', y: 4.1 },
{ x: 'Nov', y: -3.8 }, { x: 'Dec', y: -6.8 }
],
primaryXAxis: {
valueType: 'Category'
},
marker: { dataLabel: { visible: true,border:{width: 1, color : 'red'},
margin:{
left:5,
right:5,
top:5,
bottom:5
} }
},
title: "Alaska Weather Statistics - 2016"
};
},
provide: {
chart: [ColumnSeries, Category, DataLabel]
}
};
</script>
<style>
#container {
height: 350px;
}
</style>
Using angle
property, you can rotate the data label by its given angle.
<template>
<div id="app">
<ejs-chart id= "container" :title='title' :primaryXAxis='primaryXAxis'>
<e-series-collection>
<e-series :dataSource='seriesData' type='Column' xName='x' yName='y' name='Warmest' :marker='marker'> </e-series>
</e-series-collection>
</ejs-chart>
</div>
</template>
<script>
import Vue from "vue";
import { ChartPlugin, ColumnSeries, Category, DataLabel } from "@syncfusion/ej2-vue-charts";
Vue.use(ChartPlugin);
export default {
data() {
return {
seriesData: [
{ x: 'Jan', y: -7.1 }, { x: 'Feb', y: -3.7 },
{ x: 'Mar', y: 2 }, { x: 'Apr', y: 6.3 },
{ x: 'May', y: 13.3 }, { x: 'Jun', y: 18.0 },
{ x: 'Jul', y: 19.8 }, { x: 'Aug', y: 18.1 },
{ x: 'Sep', y: 13.1 }, { x: 'Oct', y: 4.1 },
{ x: 'Nov', y: -3.8 }, { x: 'Dec', y: -6.8 }
],
primaryXAxis: {
valueType: 'Category'
},
marker: { dataLabel: { visible: true,border:{width: 1, color : 'red'},
margin:{
left:5,
right:5,
top:5,
bottom:5
}, angle: 45, enableRotation: true }
},
title: "Alaska Weather Statistics - 2016"
};
},
provide: {
chart: [ColumnSeries, Category, DataLabel]
}
};
</script>
<style>
#container {
height: 350px;
}
</style>
stroke
and border
of data label can be customized using fill
and border
properties. Rounded corners
can be customized using rx
and ry
properties.
<template>
<div id="app">
<ejs-chart id= "container" :title='title' :primaryXAxis='primaryXAxis'>
<e-series-collection>
<e-series :dataSource='seriesData' type='Column' xName='x' yName='y' name='Warmest' :marker='marker'> </e-series>
</e-series-collection>
</ejs-chart>
</div>
</template>
<script>
import Vue from "vue";
import { ChartPlugin, ColumnSeries, Category, DataLabel } from "@syncfusion/ej2-vue-charts";
Vue.use(ChartPlugin);
export default {
data() {
return {
seriesData: [
{ x: 'Jan', y: -7.1 }, { x: 'Feb', y: -3.7 },
{ x: 'Mar', y: 2 }, { x: 'Apr', y: 6.3 },
{ x: 'May', y: 13.3 }, { x: 'Jun', y: 18.0 },
{ x: 'Jul', y: 19.8 }, { x: 'Aug', y: 18.1 },
{ x: 'Sep', y: 13.1 }, { x: 'Oct', y: 4.1 },
{ x: 'Nov', y: -3.8 }, { x: 'Dec', y: -6.8 }
],
primaryXAxis: {
valueType: 'Category'
},
marker:{ dataLabel: { visible: true,
border:{width: 2, color : 'red'},
rx:10, ry: 10
}
},
title: "Alaska Weather Statistics - 2016"
};
},
provide: {
chart: [ColumnSeries, Category, DataLabel]
}
};
</script>
<style>
#container {
height: 350px;
}
</style>
Note: rx
and ry
properties requires border
values not to be null.
You can also customize the specific marker and label using
pointRender
and
textRender
event.
pointRender
event allows you to change the shape, color and border for a point, whereas the textRender
event
allows you to change the text for the point.
<template>
<div id="app">
<ejs-chart id= "container" :title='title' :primaryXAxis='primaryXAxis' :pointRender='pointRender' :textRender='textRender'>
<e-series-collection>
<e-series :dataSource='seriesData' type='Column' xName='x' yName='y' name='Warmest' :marker='marker'> </e-series>
</e-series-collection>
</ejs-chart>
</div>
</template>
<script>
import Vue from "vue";
import { ChartPlugin, ColumnSeries, Category, DataLabel } from "@syncfusion/ej2-vue-charts";
Vue.use(ChartPlugin);
export default {
data() {
return {
seriesData: [
{ x: 'Jan', y: -7.1 }, { x: 'Feb', y: -3.7 },
{ x: 'Mar', y: 2 }, { x: 'Apr', y: 6.3 },
{ x: 'May', y: 13.3 }, { x: 'Jun', y: 18.0 },
{ x: 'Jul', y: 19.8 }, { x: 'Aug', y: 18.1 },
{ x: 'Sep', y: 13.1 }, { x: 'Oct', y: 4.1 },
{ x: 'Nov', y: -3.8 }, { x: 'Dec', y: -6.8 }
],
primaryXAxis: {
valueType: 'Category'
},
marker:{ dataLabel: { visible: true } },
title: "Alaska Weather Statistics - 2016"
};
},
provide: {
chart: [ColumnSeries, Category, DataLabel]
},
methods: {
pointRender: function(args) {
if (args.point.index === 6) {
args.fill = 'red'
}
},
textRender: function(args) {
if (args.point.index === 6) {
args.text = 'Maximum Temperature';
args.color = 'red';
}
}
}
};
</script>
<style>
#container {
height: 350px;
}
</style>