ng2-charts   !Travis CI slack

Beautiful charts for Angular based on Chart.js

Usage & Demo

Samples using ng2-charts

https://valor-software.com/ng2-charts/

---

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You can install _ng2-charts_ by using the Angular CLI:

``bash
ng add ng2-charts
`

The required packages will be automatically installed, and your app.config.ts will be updated with the required
changes to start using the library right away.

#### Manual install through package managers

1. You can install _ng2-charts_ using npm:

`bash
npm install ng2-charts --save
`

or yarn:

`bash
yarn add ng2-charts --save
`

2. You will also need to install and include Chart.js library in your application (it is a peer dependency of this
library, more info can be found in the
official chart.js documentation)

`bash
npm install chart.js --save
`

or with yarn:

`bash
yarn add chart.js --save
`

3. Import the directive in your standalone component:

`typescript
import { BaseChartDirective } from 'ng2-charts';

@Component({
standalone: true,
imports: [BaseChartDirective],
})
export class MyComponent {}
`

4. Provide a configuration, typically in your main.ts:

`typescript
import { provideCharts, withDefaultRegisterables } from 'ng2-charts';

bootstrapApplication(AppComponent, {
providers: [provideCharts(withDefaultRegisterables())],
}).catch((err) => console.error(err));
`

Alternatively, include a minimal configuration to reduce the bundle size, eg:

`typescript
provideCharts({ registerables: [BarController, Legend, Colors] });
`

Or in your AppModule:

`typescript
import { provideCharts, withDefaultRegisterables } from 'ng2-charts';

@NgModule({
providers: [provideCharts(withDefaultRegisterables())],
bootstrap: [AppComponent],
})
export class AppModule {}
`

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- Line Chart - https://stackblitz.com/github/santam85/ng2-charts-line-template?preset=node
- Pie Chart - https://stackblitz.com/github/santam85/ng2-charts-pie-template?preset=node
- Bar Chart - https://stackblitz.com/github/santam85/ng2-charts-bar-template?preset=node
- Doughnut Chart - https://stackblitz.com/github/santam85/ng2-charts-doughnut-template?preset=node
- Radar Chart - https://stackblitz.com/github/santam85/ng2-charts-radar-template?preset=node
- Polar Area Chart - https://stackblitz.com/github/santam85/ng2-charts-polar-area-template?preset=node
- Bubble Chart - https://stackblitz.com/github/santam85/ng2-charts-bubble-template?preset=node
- Scatter Chart - https://stackblitz.com/github/santam85/ng2-charts-scatter-template?preset=node

API

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There is one directive for all chart types: baseChart, and there are 8 types of charts: line, bar, radar, pie
, polarArea, doughnut, bubble and scatter. You can use the directive on a canvas element as follows:

`html

`

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Note: For more information about possible options please refer to original chart.js
documentation

- type: (ChartType) - indicates the type of chart, it can be: line, bar, radar, pie, polarArea, doughnut
or any custom type added to Chart.js
- data: (ChartData) - the whole data structure to be rendered in the chart. Support different
flexible formats and parsing options,
see here. In alternative, and depending on
the type of your chart, you can use the labels and datasets properties to specify individual options.
- labels: (TLabel[]) - Datasets labels. It's necessary for charts: line, bar and radar. And just labels (on
hover) for charts: polarArea, pie and doughnut. Labels are matched in order with the datasets array.
- datasets: ( ChartDataset[]) - Same as the datasets property of the data input.
See here for details.
- options: (ChartOptions) - chart options (as
per chart.js documentation).
- legend: (boolean = false) - if true, chart legend is shown.

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- chartClick: fires when click on a chart has occurred, returns information regarding active points and labels
- chartHover: fires when mousemove (hover) on a chart has occurred, returns information regarding active points and
labels

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By default, this library uses the colors as defined by Chart.js.
If you need more control on colors, eg: generating colors on the fly, see the advanced color palettes.

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The ThemeService allows clients to set a structure specifying colors
override settings. This service may be called when the dynamic theme changes, with colors which fit the theme. The
structure is interpreted as an override, with special functionality when dealing with arrays. Example:

`typescript
type Theme = 'light-theme' | 'dark-theme';

private _selectedTheme: Theme = 'light-theme';
public get selectedTheme(){
return this._selectedTheme;
}

public set selectedTheme(value){
this._selectedTheme = value;
let overrides: ChartOptions;
if (this.selectedTheme === 'dark-theme') {
overrides = {
legend: {
labels: { fontColor: 'white' }
},
scales: {
xAxes: [ {
ticks: { fontColor: 'white' },
gridLines: { color: 'rgba(255,255,255,0.1)' }
} ],
yAxes: [ {
ticks: { fontColor: 'white' },
gridLines: { color: 'rgba(255,255,255,0.1)' }
} ]
}
};
} else {
overrides = {};
}
this.themeService.setColorschemesOptions(overrides);
}

constructor(private themeService: ThemeService){
}

setCurrentTheme(theme: Theme){
this.selectedTheme = theme;
}
`

The overrides object has the same type as the chart options object ChartOptions, and wherever a simple field is
encountered it replaces the matching field in the options object. When an array is encountered (as in the xAxes
and yAxes fields above), the single object inside the array is used as a template to override all array elements in
the matching field in the options object. So in the case above, every axis will have its ticks and gridline colors
changed.

Troubleshooting

Please follow this guidelines when reporting bugs and feature requests:

1. Use GitHub Issues board to report bugs and feature requests (
not our email address)
2. Please always write steps to reproduce the error. That way we can focus on fixing the bug, not scratching our
heads trying to reproduce it.

Thanks for understanding!

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The MIT License (see the LICENSE file for the full
text)

If you like this library and want to say thanks, consider buying me a coffee!

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