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User interactions

Sparkline has two user interaction features: tooltip and tracker line.

Tooltip

The sparkline provides options to display details about values of data points through tooltips when hovering the mouse over data point. To use tooltip in sparkline, inject the SparklineTooltip module to sparkline using the inject method.

The following code example shows enabling tooltip for sparkline with format.

Source
Preview
app.vue
<template>
    <div class="control_wrapper">
    <div class="spark">
        <ejs-sparkline id="sparkline" align="center" :dataSource='dataSource' :axisSettings='axisSettings' :valueType='valueType' fill= 'blue' xName='x' yName='y' :tooltipSettings='tooltipSettings' :height='height' :width='width'></ejs-sparkline>
    </div>
    </div>
</template>
<script>
import Vue from 'vue';
import { SparklinePlugin,SparklineTooltip } from "@syncfusion/ej2-vue-charts";
Vue.use(SparklinePlugin);

export default {
  data: function() {
    return {
    height: '200px',
    width: '500px',
    axisSettings: {
        minX: -1, maxX: 7, maxY: 8, minY: -1
    },
    valueType: 'Category',
    dataSource:   [{x: 'Mon', y: 3 },{x: 'Tue', y: 5 },{x: 'Wed', y: 2 },{x: 'Thu', y: 4 },{x: 'Fri', y: 6 }],
    // To enable tooltip for sparkline
    tooltipSettings: {
        visible: true,
        format: '${x} : ${y}'
    }
    }
  },
provide:{
    sparkline:[SparklineTooltip]
}
}
</script>
<style>
.spark {
    width: 100%;
    height: 100%;
}
</style>

Tooltip customization

The fill color, text styles, format, and border of the tooltip can be customized. The following code example shows customization of tooltip’s fill color and text style.

Source
Preview
app.vue
<template>
    <div class="control_wrapper">
    <div class="spark">
        <ejs-sparkline id="sparkline" align="center" :dataSource='dataSource' :axisSettings='axisSettings' :valueType='valueType' fill= 'blue' xName='x' yName='y' :tooltipSettings='tooltipSettings' :height='height' :width='width'></ejs-sparkline>
    </div>
    </div>
</template>
<script>
import Vue from 'vue';
import { SparklinePlugin,SparklineTooltip } from "@syncfusion/ej2-vue-charts";
Vue.use(SparklinePlugin);

export default {
  data: function() {
    return {
    height: '200px',
    width: '500px',
    axisSettings: {
        minX: -1, maxX: 7, maxY: 8, minY: -1
    },
    valueType: 'Category',
    dataSource:   [{x: 'Mon', y: 3 },{x: 'Tue', y: 5 },{x: 'Wed', y: 2 },{x: 'Thu', y: 4 },{x: 'Fri', y: 6 }],
    // To enable tooltip for sparkline
    tooltipSettings: {
        visible: true,
        format: '${x} : ${y}',
        fill: '#033e96',
        textStyle: {
            color: 'white'
        },
    }
    }
  },
provide:{
    sparkline:[SparklineTooltip]
}
}
</script>
<style>
.spark {
    width: 100%;
    height: 100%;
}
</style>

Tooltip template

Sparkline tooltip has template support. By using tooltip template, you can customize tooltips. The following code example shows more customization options provided to sparktooltip css class that is used in tooltip template div. Using this template, images also can be added to tooltip.

.sparktooltip {
  border-radius: 5px;
  background: #008cff;
  color: #FFFFFF !important;
  font-size: 16px;
  font-style: italic;
  padding: 8px;
}
Source
Preview
app.vue
<template>
    <div class="control_wrapper">
    <div class="spark">
        <ejs-sparkline id="sparkline" align="center" :dataSource='dataSource' :axisSettings='axisSettings'  valueType= 'Category' fill= '#033e96' xName='x' yName='y' :tooltipSettings='tooltipSettings' :height='height' :width='width'></ejs-sparkline>
    </div>
    </div>
</template>
<script>
import Vue from 'vue';
import { SparklinePlugin,SparklineTooltip } from "@syncfusion/ej2-vue-charts";

var contentTemplate = function() {
  return { template: contentVue };
};
var contentVue = Vue.component("contentTemplate", {
  template: '<div style="border-radius: 5px; background: #008cff;color: #FFFFFF !important;font-size: 16px;font-style: italic;padding: 8px;">{{data.x}} : {{data.y}}</div>',
  data() {
    return {
      data: {}
    };
  }
});

Vue.use(SparklinePlugin);

export default {
  data: function() {
    return {
    height: '200px',
    width: '500px',
    axisSettings: {
        minX: -1, maxX: 7, maxY: 8, minY: -1
    },
    dataSource:   [{x: 'Mon', y: 3 },{x: 'Tue', y: 5 },{x: 'Wed', y: 2 },{x: 'Thu', y: 4 },{x: 'Fri', y: 6 },],
    // To enable tooltip template for sparkline with fill color, border radius and padding customization
    tooltipSettings: {
        visible: true,
        template: contentTemplate
    }
    }
  },
provide:{
    sparkline:[SparklineTooltip]
}
}
</script>
<style>
.spark {
    width: 100%;
    height: 100%;
}
</style>

Track line

The track line tracks data points that are closer to the mouse position or touch contact.

To enable track lines for sparkline, specify the visible option of trackLineSettings to true. Based on theme, tracker color will be changed. The default value of tracker color is black.

To use track line in sparkline, inject the SparklineTooltip module to sparkline using the inject method.

Source
Preview
app.vue
<template>
    <div class="control_wrapper">
    <div class="spark">
        <ejs-sparkline id="sparkline" align="center" :dataSource='dataSource' fill= '#033e96' :axisSettings='axisSettings' :tooltipSettings='tooltipSettings' :height='height' :width='width'></ejs-sparkline>
    </div>
    </div>
</template>
<script>
import Vue from 'vue';
import { SparklinePlugin,SparklineTooltip } from "@syncfusion/ej2-vue-charts";
Vue.use(SparklinePlugin);

export default {
  data: function() {
    return {
    height: '200px',
    width: '500px',
    axisSettings: {
        minX: -1, maxX: 46, maxY: 10, minY: -1
    },
    dataSource:   [5, 3, 4, 6, 8, 7, 9, 1, 3, 5, 3, 4, 6, 8, 7, 9, 1, 3, 5, 2, 4, 6, 7, 9, 5, 8, 3, 6, 1, 7, 4, 2, 5, 2, 4, 6, 7, 9, 5, 8, 3, 6, 1, 7, 4, 2],
    // To enable tooltip template for sparkline with fill color, border radius and padding customization
    tooltipSettings: {
        trackLineSettings: {
            visible: true,
            color: '#033e96',
            width: 1
        }
    }
    }
  },
provide:{
    sparkline:[SparklineTooltip]
}
}
</script>
<style>
.spark {
    width: 100%;
    height: 100%;
}
</style>