Line Chart

<wa-line-chart>

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Stable

Line charts show trends over time by connecting data points with line segments. Use them when the x-axis represents a sequential dimension and you want to emphasize the shape and direction of the data.

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<wa-line-chart label="Monthly Visitors" description="A line chart showing website visitors over seven months">
  <script type="application/json">
    {
      "data": {
        "labels": ["January", "February", "March", "April", "May", "June", "July"],
        "datasets": [{ "label": "Visitors", "data": [4200, 4800, 5100, 4900, 5500, 6200, 5800] }]
      }
    }
  </script>
</wa-line-chart>

See <wa-chart> for advanced configuration, custom plugins, and direct Chart.js access.

Examples

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Providing Data with JSON

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Place a <script type="application/json"> tag inside the component with your chart data. The type field can be omitted since wa-line-chart already knows its chart type. The JSON follows the Chart.js configuration format.

<wa-line-chart label="Weekly Signups" description="A line chart showing new user signups over one week">
  <script type="application/json">
    {
      "data": {
        "labels": ["Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"],
        "datasets": [
          {
            "label": "Signups",
            "data": [120, 95, 140, 160, 130, 80, 65]
          }
        ]
      }
    }
  </script>
</wa-line-chart>

Providing Data with JavaScript

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Set the config property from JavaScript when your data comes from code rather than static markup. The chart re-renders automatically each time you assign it. For data that updates at runtime, try the live controls in Accessing the Chart.js Instance.

<wa-line-chart
  id="line-js-example"
  label="Weekly Signups"
  description="A line chart showing new user signups over one week"
>
</wa-line-chart>
<script type="module">
  const chart = document.querySelector('#line-js-example');

  chart.config = {
    data: {
      labels: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun'],
      datasets: [
        {
          label: 'Signups',
          data: [120, 95, 140, 160, 130, 80, 65],
        },
      ],
    },
  };
</script>

config is shallowly reactive.
If you mutate the object in place, reassign it to trigger a re-render.

Multiple Lines

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Add multiple datasets to compare trends across different series.

<wa-line-chart
  id="line-multi"
  label="Traffic by Source"
  description="A line chart comparing website traffic from three different sources"
>
</wa-line-chart>
<script type="module">
  const chart = document.querySelector('#line-multi');

  chart.config = {
    data: {
      labels: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun'],
      datasets: [
        { label: 'Organic', data: [2200, 2800, 3100, 2900, 3500, 4200] },
        { label: 'Paid', data: [1800, 2100, 1900, 2400, 2200, 2600] },
        { label: 'Social', data: [800, 950, 1100, 1300, 1200, 1500] },
      ],
    },
  };
</script>

Fill Area

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Set fill to true on a dataset to fill the area beneath the line. This works well for emphasizing volume or magnitude.

<wa-line-chart
  id="line-fill-example"
  label="Cumulative Signups"
  description="A line chart with a filled area showing cumulative signups"
>
</wa-line-chart>
<script type="module">
  const chart = document.querySelector('#line-fill-example');

  chart.config = {
    data: {
      labels: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun'],
      datasets: [
        {
          label: 'Cumulative Signups',
          data: [500, 1200, 2100, 3400, 4800, 6500],
          fill: true,
        },
      ],
    },
  };
</script>

Stacked Area

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Combine the stacked attribute with fill: true on each dataset to create a stacked area chart.

<wa-line-chart
  id="line-stacked-example"
  stacked
  label="Traffic by Source"
  description="A stacked area chart showing traffic by source over time"
>
</wa-line-chart>
<script type="module">
  const chart = document.querySelector('#line-stacked-example');

  chart.config = {
    data: {
      labels: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun'],
      datasets: [
        {
          label: 'Organic',
          data: [2200, 2800, 3100, 2900, 3500, 4200],
          fill: true,
        },
        {
          label: 'Paid',
          data: [1800, 2100, 1900, 2400, 2200, 2600],
          fill: true,
        },
        {
          label: 'Social',
          data: [800, 950, 1100, 1300, 1200, 1500],
          fill: true,
        },
      ],
    },
  };
</script>

Colors

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Override the default color palette using the --fill-color-* and --border-color-* CSS custom properties on the component.

<wa-line-chart
  id="line-colors"
  label="Custom Colors"
  description="A line chart with custom purple and orange line colors"
  style="
    --fill-color-1: var(--wa-color-purple-60);
    --border-color-1: var(--wa-color-purple-60);
    --fill-color-2: var(--wa-color-orange-60);
    --border-color-2: var(--wa-color-orange-60);
  "
>
</wa-line-chart>
<script type="module">
  const chart = document.querySelector('#line-colors');

  chart.config = {
    data: {
      labels: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun'],
      datasets: [
        { label: 'Revenue', data: [12, 19, 15, 25, 22, 30] },
        { label: 'Expenses', data: [8, 12, 10, 15, 14, 18] },
      ],
    },
  };
</script>

Border Width

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Use the --line-border-width CSS custom property to control the thickness of the lines.

<wa-line-chart
  id="line-border"
  style="--line-border-width: 5px"
  label="Thick Lines"
  description="A line chart with thicker lines"
>
</wa-line-chart>
<script type="module">
  const chart = document.querySelector('#line-border');

  chart.config = {
    data: {
      labels: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri'],
      datasets: [
        {
          label: 'Response Time (ms)',
          data: [45, 52, 48, 55, 50],
        },
      ],
    },
  };
</script>

Point Radius

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Use the --point-radius CSS custom property to control the size of the dots drawn at each data point. Set it to 0 to hide points entirely.

<wa-line-chart
  id="line-points"
  style="--point-radius: 6px"
  label="Large Points"
  description="A line chart with larger data point dots"
>
</wa-line-chart>
<script type="module">
  const chart = document.querySelector('#line-points');

  chart.config = {
    data: {
      labels: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri'],
      datasets: [
        {
          label: 'Response Time (ms)',
          data: [45, 52, 48, 55, 50],
        },
      ],
    },
  };
</script>

Legend

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Use the legend-position attribute to control where the legend appears. Add without-legend to hide it entirely.

<wa-line-chart
  id="line-legend"
  legend-position="bottom"
  label="Legend at Bottom"
  description="A line chart with the legend positioned at the bottom"
>
</wa-line-chart>
<script type="module">
  const chart = document.querySelector('#line-legend');

  chart.config = {
    data: {
      labels: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun'],
      datasets: [
        { label: 'Page Views', data: [1200, 1350, 1280, 1420, 1580, 1650] },
        { label: 'Unique Visitors', data: [800, 920, 870, 980, 1050, 1120] },
      ],
    },
  };
</script>

Grid Lines

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Use the grid attribute to control which axes show grid lines. Options are both (default), x, y, and none.

<wa-line-chart
  id="line-grid"
  grid="x"
  label="X-Axis Grid Only"
  description="A line chart showing only vertical grid lines"
>
</wa-line-chart>
<script type="module">
  const chart = document.querySelector('#line-grid');

  chart.config = {
    data: {
      labels: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri'],
      datasets: [
        {
          label: 'Orders',
          data: [42, 58, 35, 61, 48],
        },
      ],
    },
  };
</script>

Axis Labels

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Use the x-label and y-label attributes to add descriptive labels to each axis.

<wa-line-chart
  id="line-axis"
  x-label="Month"
  y-label="Visitors"
  label="Monthly Traffic"
  description="A line chart with labeled axes showing monthly visitors"
>
</wa-line-chart>
<script type="module">
  const chart = document.querySelector('#line-axis');

  chart.config = {
    data: {
      labels: ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun'],
      datasets: [
        {
          label: 'Visitors',
          data: [4200, 4800, 5100, 4900, 5500, 6200],
        },
      ],
    },
  };
</script>

Axis Range

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Use the min and max attributes to constrain the value axis.

<wa-line-chart
  id="line-range"
  min="0"
  max="100"
  label="Completion Rate"
  description="A line chart with a constrained y-axis from 0 to 100"
>
</wa-line-chart>
<script type="module">
  const chart = document.querySelector('#line-range');

  chart.config = {
    data: {
      labels: ['Week 1', 'Week 2', 'Week 3', 'Week 4', 'Week 5'],
      datasets: [
        {
          label: 'Completion Rate (%)',
          data: [62, 71, 68, 85, 78],
        },
      ],
    },
  };
</script>

Disabling Features

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Use without-tooltip to hide hover tooltips and without-animation to disable transitions.

<wa-line-chart
  id="line-disabled"
  without-tooltip
  without-animation
  label="Minimal"
  description="A line chart with tooltips and animations disabled"
>
</wa-line-chart>
<script type="module">
  const chart = document.querySelector('#line-disabled');

  chart.config = {
    data: {
      labels: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri'],
      datasets: [
        {
          label: 'New Subscribers',
          data: [28, 35, 42, 47, 53],
        },
      ],
    },
  };
</script>

API

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Importing

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If you're using the autoloader or a hosted project, components load on demand — no manual import needed. To cherry-pick a component manually, use one of the following snippets.

CDN

npm

Self-Hosted

React

Import this component directly from the CDN:

import 'https://ka-f.webawesome.com/[email protected]/components/line-chart/line-chart.js';

After installing Web Awesome via npm, import this component:

import '@awesome.me/webawesome/dist/components/line-chart/line-chart.js';

If you're self-hosting Web Awesome, import this component from your server:

import './webawesome/dist/components/line-chart/line-chart.js';

To import this component for React 18 or below, use the following code:

import WaLineChart from '@awesome.me/webawesome/dist/react/line-chart/index.js';

Slots

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Learn more about using slots.

Name	Description
(default)	An optional `<script type="application/json">` element containing the Chart.js configuration object.

Attributes & Properties

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Learn more about attributes and properties.

Name	Description	Reflects
`config`	The Chart.js configuration object. Setting this property will automatically re-render the chart. Type `ChartJS['config']`
`description` `description`	A description of the chart, used for accessibility. Type `string \| null` Default `null`
`grid` `grid`	Which axes to show grid lines on. Type `'x' \| 'y' \| 'both' \| 'none'` Default `'both'`
`indexAxis` `index-axis`	The base axis of the dataset. 'x' for vertical bars and 'y' for horizontal bars. Type `'x' \| 'y'` Default `'x'`
`label` `label`	A label for the chart, used for accessibility. Type `string \| null` Default `null`
`legendPosition` `legend-position`	The position of the legend relative to the chart. Type `LayoutPosition \| 'start' \| 'end'` Default `'top'`
`max` `max`	The maximum value for the value axis. Type `number \| null` Default `null`
`min` `min`	The minimum value for the value axis. Type `number \| null` Default `null`
`plugins` `plugins`	Additional Chart.js plugins to register for this chart instance. Type `array` Default `[]`
`stacked` `stacked`	Stacks datasets on top of each other along the value axis. Type `boolean` Default `false`
`type` `type`	The type of chart to render. Valid types include `bar`, `line`, `pie`, `doughnut`, `polarArea`, `radar`, `scatter`, and `bubble`. Type `ChartType` Default `'line'`
`withoutAnimation` `without-animation`	Disables chart animations Type `boolean` Default `false`
`withoutLegend` `without-legend`	Hides the legend Type `boolean` Default `false`
`withoutTooltip` `without-tooltip`	Hides tooltips over data points Type `boolean` Default `false`
`xLabel` `x-label`	A label for the x-axis. Type `string \| null` Default `null`
`yLabel` `y-label`	A label for the y-axis. Type `string \| null` Default `null`

CSS Custom Properties

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Learn more about CSS custom properties.

Name	Description
`--border-color-1`	Border color for the first dataset. Default `var(--wa-color-blue-60)`
`--border-color-2`	Border color for the second dataset. Default `var(--wa-color-pink-60)`
`--border-color-3`	Border color for the third dataset. Default `var(--wa-color-green-60)`
`--border-color-4`	Border color for the fourth dataset. Default `var(--wa-color-yellow-60)`
`--border-color-5`	Border color for the fifth dataset. Default `var(--wa-color-purple-60)`
`--border-color-6`	Border color for the sixth dataset. Default `var(--wa-color-orange-60)`
`--border-radius`	Border radius for bar charts. Default `var(--wa-border-radius-s)`
`--border-width`	Border width for bars and arcs. Default `var(--wa-border-width-s)`
`--fill-color-1`	Fill color for the first dataset. Default `color-mix(in srgb, var(--wa-color-blue-60) 40%, transparent)`
`--fill-color-2`	Fill color for the second dataset. Default `color-mix(in srgb, var(--wa-color-pink-60) 40%, transparent)`
`--fill-color-3`	Fill color for the third dataset. Default `color-mix(in srgb, var(--wa-color-green-60) 40%, transparent)`
`--fill-color-4`	Fill color for the fourth dataset. Default `color-mix(in srgb, var(--wa-color-yellow-60) 40%, transparent)`
`--fill-color-5`	Fill color for the fifth dataset. Default `color-mix(in srgb, var(--wa-color-purple-60) 40%, transparent)`
`--fill-color-6`	Fill color for the sixth dataset. Default `color-mix(in srgb, var(--wa-color-orange-60) 40%, transparent)`
`--grid-border-width`	Border width for chart grid lines and axis borders. Default `var(--wa-border-width-s)`
`--grid-color`	Color of the chart grid lines and axis borders. Default `var(--wa-color-neutral-border-quiet)`
`--line-border-width`	Border width for line and radar charts. Default `var(--wa-border-width-m)`
`--point-radius`	Radius of data point dots. Default `var(--wa-border-width-m)`

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Line Chart

Examples

Providing Data with JSON

Providing Data with JavaScript

Multiple Lines

Fill Area

Stacked Area

Colors

Border Width

Point Radius

Legend

Grid Lines

Axis Labels

Axis Range

Disabling Features

API

Importing

Slots

Attributes & Properties

CSS Custom Properties

Quick Links

Recent Searches

Line Chart

Examples

Providing Data with JSON

Providing Data with JavaScript

Multiple Lines

Fill Area

Stacked Area

Colors

Border Width

Point Radius

Legend

Grid Lines

Axis Labels

Axis Range

Disabling Features

API

Importing

Slots

Attributes & Properties

CSS Custom Properties

Quick Links

Recent Searches

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