NGX-ECHARTS

Angular directive for Apache ECharts

Online Demo | Starter

Table of contents

• Getting Started
• Latest Update
• Installation
  • Upgrade from v4.x
• Usage
  • Standalone
  • NgModule
  • Directive
• API
  • Directive
  • ECharts API
  • ECharts Instance
  • ECharts Extensions
  • Service
• Events
• Custom Build
  • Treeshaking Custom Build
  • Legacy Custom Build
• Custom Locale
• Demo

Getting Started

ngx-echarts is an Angular (ver >= 2.x) directive for ECharts (ver >= 3.x).

Latest version @npm:

• v18.0.0 for Angular 18
• v17.2.0 for Angular 17
• v16.2.0 for Angular 16
• v15.0.3 for Angular 15
• v14.0.0 for Angular 14
• v8.0.1 for Angular 13
• v7.1.0 for Angular >= 11, < 13
• v6.0.1 for Angular >= 10, < 11
• v5.2.2 for Angular >= 6, < 10
• v2.3.1 for Angular < 6 (Please refer to https://github.com/xieziyu/ngx-echarts/blob/v2.x/README.md)

A starter project on Github: https://github.com/xieziyu/ngx-echarts-starter

Latest Update

• 2024.05.25: v18.0.0
  • Feat: Upgrade to angular 18

CHANGELOG.md

Installation

• Since v5.0

  # if you use npm
  npm install echarts -S
  npm install ngx-echarts -S
  
  # or if you use yarn
  yarn add echarts
  yarn add ngx-echarts

• If you need ECharts GL support, please install it first:

  npm install echarts-gl -S
  
  # or
  yarn add echarts-gl

• Import other extensions such as themes or echarts-gl in your main.ts: ECharts Extensions

Upgrade from v4.x

1. import echarts and provide it in NgxEchartsModule.forRoot({ echarts }).
2. NgxEchartsCoreModule is removed.

Usage

Please refer to the demo page.

Standalone

import NgxEchartsDirective and provideEcharts. Or you can use provideEchartsCore to do treeshaking custom build.

import { NgxEchartsDirective, provideEcharts } from 'ngx-echarts';

@Component({
  selector: 'app-root',
  standalone: true,
  imports: [CommonModule, NgxEchartsDirective],
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.scss'],
  providers: [
    provideEcharts(),
  ]
})
export class AppComponent {}

NgModule

import NgxEchartsModule:

import { NgxEchartsModule } from 'ngx-echarts';

@NgModule({
  imports: [
    NgxEchartsModule.forRoot({
      /**
       * This will import all modules from echarts.
       * If you only need custom modules,
       * please refer to [Custom Build] section.
       */
      echarts: () => import('echarts'), // or import('./path-to-my-custom-echarts')
    }),
  ],
})
export class AppModule {}

The echarts library will be imported only when it gets called the first time thanks to the function that uses the native import.

You can also directly pass the echarts instead which will slow down initial rendering because it will load the whole echarts into your main bundle.

import * as echarts from 'echarts';
import { NgxEchartsModule } from 'ngx-echarts';

@NgModule({
  imports: [
    NgxEchartsModule.forRoot({ echarts }),
  ],
})
export class AppModule {}

Directive

use echarts directive in a div which has pre-defined height. (From v2.0, it has default height: 400px)

• html:

<div echarts [options]="chartOption" class="demo-chart"></div>

• css:

.demo-chart {
  height: 400px;
}

• component:

import { EChartsOption } from 'echarts';

// ...

chartOption: EChartsOption = {
  xAxis: {
    type: 'category',
    data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun'],
  },
  yAxis: {
    type: 'value',
  },
  series: [
    {
      data: [820, 932, 901, 934, 1290, 1330, 1320],
      type: 'line',
    },
  ],
};

API

Directive

echarts directive support following input properties:

Input	Type	Default	Description
[options]	object	null	The same as the options on the official demo site.
[merge]	object	null	Used to update a part of the options, especially helpful when you need to update the chart data. In fact, the value of merge will be used in echartsInstance.setOption() with notMerge = false. Refer to ECharts documentation for details.
[loading]	boolean	false	Used to toggle the echarts loading animation when your data is not ready.
[autoResize]	boolean	true	If set to true, the chart will be automatically resized when the window's width is changed.
[initOpts]	object	null	The value of [initOpts] will be used in echarts.init(). It may contain devicePixelRatio, renderer, width or height properties. Refer to ECharts documentation for details.
[theme]	string	null	Used it to initialize echarts with theme. The theme file must also be imported in main.ts.
[loadingOpts]	object	null	Input an object to customize the loading style. Refer to ECharts documentation for details.

By default, loadingOpts is:

{
  text: 'loading',
  color: '#c23531',
  textColor: '#000',
  maskColor: 'rgba(255, 255, 255, 0.8)',
  zlevel: 0
}

ECharts API

If you need to access parts of the ECharts API such as echarts.graphic, please import it from echarts. For example:

import { graphic } from 'echarts';

new graphic.LinearGradient(/* ... */);

ECharts Instance

echartsInstance is exposed (since v1.1.6) in the (chartInit) event, enabling you to directly call functions like: resize(), showLoading(), etc. For example:

• html:

<div echarts class="demo-chart" [options]="chartOptions" (chartInit)="onChartInit($event)"></div>

• component:

onChartInit(ec) {
  this.echartsInstance = ec;
}

resizeChart() {
  if (this.echartsInstance) {
    this.echartsInstance.resize();
  }
}

ECharts Extensions

Import echarts theme files or other extension files after you have imported echarts core. For example:

import * as echarts from 'echarts';

/** echarts extensions: */
import 'echarts-gl';
import 'echarts/theme/macarons.js';
import 'echarts/dist/extension/bmap.min.js';

Service

NgxEchartsService has been obsolete since v4.0

Events

As ECharts supports the 'click', 'dblclick', 'mousedown', 'mouseup', 'mouseover', 'mouseout', and 'globalout' mouse events, our ngx-echarts directive also supports the same mouse events but with an additional chart prefix. For example:

• html:

<div echarts class="demo-chart" [options]="chartOptions" (chartClick)="onChartClick($event)"></div>

• The '$event' is same with the 'params' that ECharts dispatches.

It supports following event outputs:

@Output	Event
chartInit	Emitted when the chart is initialized
chartClick	echarts event: 'click'
chartDblClick	echarts event: 'dblclick'
chartMouseDown	echarts event: 'mousedown'
chartMouseMove	echarts event: 'mousemove'
chartMouseUp	echarts event: 'mouseup'
chartMouseOver	echarts event: 'mouseover'
chartMouseOut	echarts event: 'mouseout'
chartGlobalOut	echarts event: 'globalout'
chartContextMenu	echarts event: 'contextmenu'
chartHighlight	echarts event: 'highlight'
chartDownplay	echarts event: 'downplay'
chartSelectChanged	echarts event: 'selectchanged'
chartLegendSelectChanged	echarts event: 'legendselectchanged'
chartLegendSelected	echarts event: 'legendselected'
chartLegendUnselected	echarts event: 'legendunselected'
chartLegendLegendSelectAll	echarts event: 'legendselectall'
chartLegendLegendInverseSelect	echarts event: 'legendinverseselect'
chartLegendScroll	echarts event: 'legendscroll'
chartDataZoom	echarts event: 'datazoom'
chartDataRangeSelected	echarts event: 'datarangeselected'
chartGraphRoam	echarts event: 'graphroam'
chartGeoRoam	echarts event: 'georoam'
chartTreeRoam	echarts event: 'treeroam'
chartTimelineChanged	echarts event: 'timelinechanged'
chartTimelinePlayChanged	echarts event: 'timelineplaychanged'
chartRestore	echarts event: 'restore'
chartDataViewChanged	echarts event: 'dataviewchanged'
chartMagicTypeChanged	echarts event: 'magictypechanged'
chartGeoSelectChanged	echarts event: 'geoselectchanged'
chartGeoSelected	echarts event: 'geoselected'
chartGeoUnselected	echarts event: 'geounselected'
chartAxisAreaSelected	echarts event: 'axisareaselected'
chartBrush	echarts event: 'brush'
chartBrushEnd	echarts event: 'brushend'
chartBrushSelected	echarts event: 'brushselected'
chartGlobalCursorTaken	echarts event: 'globalcursortaken'
chartRendered	echarts event: 'rendered'
chartFinished	echarts event: 'finished'

You can refer to the ECharts tutorial: Events and Actions in ECharts for more details of the event params. You can also refer to the demo page for a detailed example.

Custom Build

Treeshaking Custom Build

Since version 5.0.1 ECharts supports Treeshaking with NPM.

The app.modules.ts should look like this:

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { HttpClientModule } from '@angular/common/http';

import { NgxEchartsDirective, provideEchartsCore } from 'ngx-echarts';

import { AppComponent } from './app.component';

// Import the echarts core module, which provides the necessary interfaces for using echarts.
import * as echarts from 'echarts/core';

// Import bar charts, all suffixed with Chart
import { BarChart } from 'echarts/charts';

// Import the tooltip, title, rectangular coordinate system, dataset and transform components
import {
  TitleComponent,
  TooltipComponent,
  GridComponent,
  DatasetComponent,
  TransformComponent
} from 'echarts/components';

// Features like Universal Transition and Label Layout
import { LabelLayout, UniversalTransition } from 'echarts/features';

// Import the Canvas renderer
// Note that including the CanvasRenderer or SVGRenderer is a required step
import { CanvasRenderer } from 'echarts/renderers';

// Import the theme
import 'echarts/theme/macarons.js';

// Register the required components
echarts.use([
  BarChart,
  TitleComponent,
  TooltipComponent,
  GridComponent,
  DatasetComponent,
  TransformComponent,
  LabelLayout,
  UniversalTransition,
  CanvasRenderer
]);

@NgModule({
  declarations: [AppComponent],
  imports: [
    BrowserModule,
    HttpClientModule,
    // import standalone directive:
    NgxEchartsDirective,
  ],
  providers: [{ 
    // Provide custom builded ECharts core:
    provideEchartsCore({ echarts })
  }],
  bootstrap: [AppComponent],
})
export class AppModule {}

Legacy Custom Build

Please refer to ECharts Documentation for more details.

If you want to produce a custom build of ECharts, prepare a file like custom-echarts.ts:

// custom-echarts.ts
export * from 'echarts/src/echarts';

import 'echarts/src/chart/line';
import 'echarts/src/chart/bar';
// component examples:
import 'echarts/src/component/tooltip';
import 'echarts/src/component/title';
import 'echarts/src/component/toolbox';

And then inject it in your NgxEchartsModule:

import { NgxEchartsModule } from 'ngx-echarts';
import * as echarts from './custom-echarts';

@NgModule({
  imports: [
    NgxEchartsModule.forRoot({
      echarts,
    }),
  ],
})
export class AppModule {}

And if you want to use the global echarts object, please import it from lib or src instead:

import * as echarts from 'echarts/lib/echarts';

If you need to import theme files, remember to change the 'echarts' path to 'echarts/lib/echarts', for example:

// ... part of echarts/theme/dark.js:
function (root, factory) {
    if (typeof define === 'function' && define.amd) {
        // AMD. Register as an anonymous module.
        define(['exports', 'echarts/lib/echarts'], factory);
    } else if (typeof exports === 'object' && typeof exports.nodeName !== 'string') {
        // CommonJS
        factory(exports, require('echarts/lib/echarts'));
    } else {
        // Browser globals
        factory({}, root.echarts);
    }
}

Custom Locale

You can change the chart locale registering a built-in locale (located in node_modules/echarts/lib/i18n/) or a custom locale object. To register a locale, you will need to change the module that echart is being imported (usually app.module.ts).

import {NgxEchartsModule} from "ngx-echarts";
import * as echarts from 'echarts/core';
import langCZ from 'echarts/lib/i18n/langCZ';

echarts.registerLocale("CZ", langCZ)

@NgModule({
  imports: [NgxEchartsModule.forRoot({echarts})],
  declarations: [],
  providers: [],
  bootstrap: [AppComponent]
})

and in your HTML file use:

<div echarts [initOpts]="{ locale: 'CZ' }" [options]="options" class="demo-chart"></div>

Demo

You can clone this repo to your working copy and then launch the demo page in your local machine:

npm install
npm run demo

# or
yarn install
yarn demo

The demo page server is listening on: http://localhost:4202