Angular directive for Apache ECharts (incubating) (version >= 3.x) (The project is renamed from angular2-echarts)

• Online Demo
• Online Docs
• Starter Project
• Changelog

• ngx-echarts
  • 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

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

Latest version @npm:

• v17.1.0 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

• 2023.11.10: v17.1.0 / v16.2.0:

  • Feat: Exported standalone NgxEchartsDirective, provideEcharts and provideEchartsCore

• 2023.11.08: v17.0.1:

  • Feat: upgrade to Angular 17

• 2023.10.11: v16.1.0:

  • Feat: Add types to chartXXX EventEmitters. Support new events such as: 'selectchanged'

• 2023.05.10: v16.0.0:

  • Feat: upgrade to Angular 16
  • Chore: replaced tslint with eslint.

• 2023.03.27: v15.0.3:

  • Fix: [loading]=true is not triggered when chart initialized.

• 2023.03.20: v15.0.2:

  • Fix: unsubscribe ChangeFilter subscriptions onDestroy.

• 2022.12.01: v15.0.1:

  • Feat: Support nullable @Inputs. Issue #378

• 2022.11.23: v15.0.0:

  • Feat: upgrade to Angular 15

• 2022.06.21: v14.0.0:

  • Feat: upgrade to Angular 14

• 2021.12.07: v8.0.1:

  • Fix: NgxEchartsModule.forChild() issue #334

• 2021.11.08: v8.0.0 / v7.1.0:

  • Fix: remove @juggle/resize-observer from the peer dependencies
  • Perf: fix performance issue #330

• 2021.05.17: v7.0.0:

  • Feat: support Angular v11, ECharts v5
  • Feat: support echart theme object
  • Perf: resize animation

• 2021.01.10: v6.0.1:

  • PR #295: Guard dispose (by taipeiwu)

• 2021.01.10: v6.0.0:

  • PR #285: Guard dispose (by gjsmith66)
  • update demo to use echarts v5.0
  • PR #282: fix avoid "ResizeObserver loop limit exceeded" error (by parkdihoon)
  • PR #272: Angular 10 support (by Ghostbird)

• 2020.11.07: v5.2.1:

  • Required resize-observer-polyfill
  • PR #271: Fix autoResize functionality (by ThomasBower)
  • Exposed methods: refreshChart() and resize()

• 2020.07.24: v5.1.0:

  • PR #240: Added output 'optionsError' (by trajnisz)
  • PR #242: Add output for brushEnd event (by Uular)
  • PR #246: Allow loading echarts library lazily via native import (by smnbbrv)

• 2020.05.19: v5.0.0

  • BREAKING CHANGES:
    • NgxEchartsModule provides .forRoot() method to inject echarts core.
    • Due to .forRoot method, we can do custom build without NgxEchartsCoreModule. Just import the echarts core from echarts/src/echarts, and other necessary charts.
    • NgxEchartsCoreModule is removed.
    • [detectEventChanges] is removed.

• 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

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

Please refer to the demo page.

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 {}

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 {}

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',
    },
  ],
};

echarts directive support following input properties:

By default, loadingOpts is:

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

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(/* ... */);

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();
  }
}

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';

NgxEchartsService has been obsolete since v4.0

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:

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.

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 {}

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);
    }
}

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>

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