ngx-echarts

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

• Online Demo
• Online Docs
• Starter Project
• Changelog

Table of contents

• ngx-echarts
  • Table of contents
• Getting Started
• Latest Update
• Installation
  • Upgrade from v4.x
• Usage
• API
  • Directive
  • ECharts API
  • ECharts Instance
  • ECharts Extensions
  • Service
• Events
• Custom Build
  • Legacy version
  • ECharts 5 Treeshaking
• Custom Locale
• Demo

Getting Started

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

Latest version @npm:

• v7.x for Angular >= 11
• v6.x for Angular >= 10, < 11
• v5.x 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

• 2021.08.05: v7.0.2:

  • PR #322: Add initOpts locale property (by augustoicaro)

• 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.

Installation

• Since v5.0

  # if you use npm
  npm install echarts -S
  npm install ngx-echarts -S
  npm install @juggle/resize-observer -S
  
  # or if you use yarn
  yarn add echarts
  yarn add ngx-echarts
  yarn add -D @juggle/resize-observer

• 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.

1. Firstly, import NgxEchartsModule in your app module (or any other proper angular module):

   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 { NgxEchartsModule } from 'ngx-echarts';
   
   @NgModule({
     imports: [
       NgxEchartsModule.forRoot({
         echarts: () => import('echarts'),
       }),
     ],
   })
   export class AppModule {}

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

   • Simple example:

     • html:

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

     • scss:

     .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:

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:

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

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);
    }
}

Treeshaking Custom Build

Since version 5.0.1 ECharts supports Treeshaking with NPM.

There is no need for the custom-echarts.ts file anymore. 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 { NgxEchartsModule } 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 with Chart suffix
import { BarChart } from 'echarts/charts';
import { TitleComponent, TooltipComponent, GridComponent } from 'echarts/components';
// Import the Canvas renderer, note that introducing the CanvasRenderer or SVGRenderer is a required step
import { CanvasRenderer } from 'echarts/renderers';
import 'echarts/theme/macarons.js';

echarts.use([TitleComponent, TooltipComponent, GridComponent, BarChart, CanvasRenderer]);

@NgModule({
  declarations: [AppComponent],
  imports: [BrowserModule, NgxEchartsModule.forRoot({ echarts }), HttpClientModule],
  providers: [],
  bootstrap: [AppComponent],
})
export class AppModule {}

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