Date time axis in Vue Chart component

3 Mar 202324 minutes to read

DateTime Axis

 Date time axis uses date time scale and displays the date time values as axis labels in the specified format.

app.vue

<template>
    <div id="app">
         <ejs-chart id="container" :title='title' :primaryXAxis='primaryXAxis' :primaryYAxis='primaryYAxis'>
            <e-series-collection>
                <e-series :dataSource='seriesData' type='Line' xName='x' yName='y' name='Sales'> </e-series>
            </e-series-collection>
        </ejs-chart>
    </div>
</template>
<script>
import Vue from "vue";
import { ChartPlugin, LineSeries, DateTime } from "@syncfusion/ej2-vue-charts";

Vue.use(ChartPlugin);

export default {
  data() {
    return {
    seriesData:[
                 { x: new Date(2000, 6, 11), y: 10 }, { x: new Date(2002, 3, 7), y: 30 },
                 { x: new Date(2004, 3, 6), y: 15 }, { x: new Date(2006, 3, 30), y: 65 },
                 { x: new Date(2008, 3, 8), y: 90 }, { x: new Date(2010, 3, 8), y: 85 }
        ],
      primaryXAxis: {
          valueType: 'DateTime',
          title: 'Sales Across Years',
          labelFormat: 'yMMM'
        },
         primaryYAxis: {
           title: 'Sales Amount in millions(USD)',
        },
      title: "Average Sales Comparison"
    };
  },
  provide: {
    chart: [LineSeries, DateTime]
  }
};
</script>
<style>
 #container {
   height: 350px;
 }
</style>

Note: To use datetime axis, we need to inject DateTime into the provide and set the valueType of axis to DateTime.

DateTimeCategory Axis

Date-time category axis is used to display the date-time values with non-linear intervals. For example, the
business days alone have been depicted in a week here.

app.vue

<template>
    <div id="app">
         <ejs-chart id="container"  :title='title' :primaryXAxis='primaryXAxis' :primaryYAxis='primaryYAxis'>
            <e-series-collection>
                <e-series :dataSource='seriesData' type='Line' xName='x' yName='y' name='Sales'> </e-series>
            </e-series-collection>
        </ejs-chart>
    </div>
</template>
<script>
import Vue from "vue";
import { ChartPlugin, LineSeries, DateTimeCategory } from "@syncfusion/ej2-vue-charts";

Vue.use(ChartPlugin);

export default {
  data() {
    return {
    seriesData:[{ x: new Date(2017, 11, 20), y: 21 }, { x: new Date(2017, 11, 21), y: 24 },
                { x: new Date(2017, 11, 22), y: 24 }, { x: new Date(2017, 11, 26), y: 70 },
                { x: new Date(2017, 11, 27), y: 75 }, { x: new Date(2018, 0, 2), y: 82 },
                { x: new Date(2018, 0, 3), y: 53 }, { x: new Date(2018, 0, 4), y: 54 },
                { x: new Date(2018, 0, 5), y: 53 }, { x: new Date(2018, 0, 8), y: 45 }
                ],
      primaryXAxis: {
           valueType: 'DateTimeCategory'
        },
         primaryYAxis: {
           title: 'Sales Amount in millions(USD)',
        },
      title: "Average Sales Comparison"
    };
  },
  provide: {
    chart: [LineSeries, DateTimeCategory]
  }
};
</script>
<style>
 #container {
   height: 350px;
 }
</style>

Note: To use datetime axis, we need to inject DateTimeCategory into the provide and

set the valueType of axis to DateTimeCategory. Of the axis using minimum, maximum and interval property of the axis.

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='Sales'> </e-series>
            </e-series-collection>
        </ejs-chart>
    </div>
</template>
<script>
import Vue from "vue";
import { ChartPlugin, LineSeries, DateTime } from "@syncfusion/ej2-vue-charts";

Vue.use(ChartPlugin);

export default {
  data() {
    return {
    seriesData:[
                 { x: new Date(2000, 6, 11), y: 10 }, { x: new Date(2002, 3, 7), y: 30 },
                 { x: new Date(2004, 3, 6), y: 15 }, { x: new Date(2006, 3, 30), y: 65 },
                 { x: new Date(2008, 3, 8), y: 90 }, { x: new Date(2010, 3, 8), y: 85 }
        ],
      primaryXAxis: {
          valueType: 'DateTime',
            title: 'Sales Across Years',
            labelFormat: 'yMMM',
            minimum: new Date(2000, 6, 1),
            maximum: new Date(2010, 6, 1)
        },
      title: "Average Sales Comparison"
    };
  },
  provide: {
    chart: [LineSeries, DateTime]
  }
};
</script>
<style>
 #container {
   height: 350px;
 }
</style>

Interval Customization

Date time intervals can be customized by using the interval andintervalType properties of the axis. For example, when you set interval as 2 and intervalType as years, it considers 2 years as interval.
DateTime axis supports following interval types,

• Auto
• Years
• Months
• Days
• Hours
• Minutes
• Seconds

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='Sales'> </e-series>
            </e-series-collection>
        </ejs-chart>
    </div>
</template>
<script>
import Vue from "vue";
import { ChartPlugin, LineSeries, DateTime } from "@syncfusion/ej2-vue-charts";

Vue.use(ChartPlugin);

export default {
  data() {
    return {
    seriesData:[
                 { x: new Date(2000, 6, 11), y: 10 }, { x: new Date(2002, 3, 7), y: 30 },
                 { x: new Date(2004, 3, 6), y: 15 }, { x: new Date(2006, 3, 30), y: 65 },
                 { x: new Date(2008, 3, 8), y: 90 }, { x: new Date(2010, 3, 8), y: 85 }
        ],
      primaryXAxis: {
           valueType: 'DateTime',
           intervalType: 'Years'
        },
      title: "Average Sales Comparison"
    };
  },
  provide: {
    chart: [LineSeries, DateTime]
  }
};
</script>
<style>
 #container {
   height: 350px;
 }
</style>

Applying Padding to the Range

Padding can be applied to the minimum and maximum extremes of the range by using the
rangePadding property. Date time axis supports the following types

• None
• Additional

DateTime - None

When the rangePadding is set to None, minimum and maximum of the axis is based on the data.

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='Sales'> </e-series>
            </e-series-collection>
        </ejs-chart>
    </div>
</template>
<script>
import Vue from "vue";
import { ChartPlugin, LineSeries, DateTime } from "@syncfusion/ej2-vue-charts";

Vue.use(ChartPlugin);

export default {
  data() {
    return {
    seriesData:[
                 { x: new Date(2000, 6, 11), y: 10 }, { x: new Date(2002, 3, 7), y: 30 },
                 { x: new Date(2004, 3, 6), y: 15 }, { x: new Date(2006, 3, 30), y: 65 },
                 { x: new Date(2008, 3, 8), y: 90 }, { x: new Date(2010, 3, 8), y: 85 }
        ],
      primaryXAxis: {
            valueType: 'DateTime',
            title: 'Sales Across Years',
            labelFormat: 'yMMM',
            rangePadding: 'None'
        },
      title: "Average Sales Comparison"
    };
  },
  provide: {
    chart: [LineSeries, DateTime]
  }
};
</script>
<style>
 #container {
   height: 350px;
 }
</style>

DateTime - Round

When the rangePadding is set to Round, minimum and maximum will be
rounded to the nearest possible value divisible by interval. For example, when the minimum is 15th Jan, interval is
1 and the interval type is ‘month’, then the axis minimum will be Jan 1st.

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='Sales'> </e-series>
            </e-series-collection>
        </ejs-chart>
    </div>
</template>
<script>
import Vue from "vue";
import { ChartPlugin, LineSeries, DateTime } from "@syncfusion/ej2-vue-charts";

Vue.use(ChartPlugin);

export default {
  data() {
    return {
    seriesData:[
                 { x: new Date(2000, 6, 11), y: 10 }, { x: new Date(2002, 3, 7), y: 30 },
                 { x: new Date(2004, 3, 6), y: 15 }, { x: new Date(2006, 3, 30), y: 65 },
                 { x: new Date(2008, 3, 8), y: 90 }, { x: new Date(2010, 3, 8), y: 85 }
        ],
      primaryXAxis: {
            valueType: 'DateTime',
            title: 'Sales Across Years',
            labelFormat: 'yMMM',
            rangePadding: 'Round'
        },
      title: "Average Sales Comparison"
    };
  },
  provide: {
    chart: [LineSeries, DateTime]
  }
};
</script>
<style>
 #container {
   height: 350px;
 }
</style>

DateTime - Additional

When the rangePadding is set to Additional, interval of an axis will
be padded to the minimum and maximum of the axis.

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='Sales'> </e-series>
            </e-series-collection>
        </ejs-chart>
    </div>
</template>
<script>
import Vue from "vue";
import { ChartPlugin, LineSeries, DateTime } from "@syncfusion/ej2-vue-charts";

Vue.use(ChartPlugin);

export default {
  data() {
    return {
    seriesData:[
                 { x: new Date(2000, 6, 11), y: 10 }, { x: new Date(2002, 3, 7), y: 30 },
                 { x: new Date(2004, 3, 6), y: 15 }, { x: new Date(2006, 3, 30), y: 65 },
                 { x: new Date(2008, 3, 8), y: 90 }, { x: new Date(2010, 3, 8), y: 85 }
        ],
      primaryXAxis: {
            valueType: 'DateTime',
            title: 'Sales Across Years',
            labelFormat: 'yMMM',
            rangePadding: 'Additional'
        },
      title: "Average Sales Comparison"
    };
  },
  provide: {
    chart: [LineSeries, DateTime]
  }
};
</script>
<style>
 #container {
   height: 350px;
 }
</style>

Label Format

You can format and parse the date to all globalize format using labelFormat property in an axis.

app.vue

<template>
    <div id="app">
         <ejs-chart id="container" :title='title' :primaryXAxis='primaryXAxis' :primaryYAxis='primaryYAxis'>
            <e-series-collection>
                <e-series :dataSource='seriesData' type='Line' xName='x' yName='y' name='Sales'> </e-series>
            </e-series-collection>
        </ejs-chart>
    </div>
</template>
<script>
import Vue from "vue";
import { ChartPlugin, LineSeries, DateTime } from "@syncfusion/ej2-vue-charts";

Vue.use(ChartPlugin);

export default {
  data() {
    return {
    seriesData:[
                 { x: new Date(2000, 6, 11), y: 10 }, { x: new Date(2002, 3, 7), y: 30 },
                 { x: new Date(2004, 3, 6), y: 15 }, { x: new Date(2006, 3, 30), y: 65 },
                 { x: new Date(2008, 3, 8), y: 90 }, { x: new Date(2010, 3, 8), y: 85 }
        ],
      primaryXAxis: {
            valueType: 'DateTime',
            title: 'Sales Across Years',
            labelFormat: 'yMd'
        },
      primaryYAxis: {
            title: 'Sales Amount in millions(USD)',
        },
      title: "Average Sales Comparison"
    };
  },
  provide: {
    chart: [LineSeries, DateTime]
  }
};
</script>
<style>
 #container {
   height: 350px;
 }
</style>

The following table describes the result of applying some common date time formats to the labelFormat property

Label Value	Label Format Property Value	Result	Description
new Date(2000, 03, 10)	EEEE	Monday	The Date is displayed in day format
new Date(2000, 03, 10)	yMd	04/10/2000	The Date is displayed in month/date/year format
new Date(2000, 03, 10)	MMM	Apr	The Shorthand month for the date is displayed
new Date(2000, 03, 10)	hm	12:00 AM	Time of the date value is displayed as label
new Date(2000, 03, 10)	hms	12:00:00 AM	The Label is displayed in hours:minutes:seconds format