ngx-echarts

ngx-echarts

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

• Online Demo
• Online Docs
• Starter Project

Table of contents

1. Getting Started
2. Latest Update
3. Installation
4. Usage
5. API
6. Events
7. Demo

Getting Started

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

Latest version @npm:

• v4.0.0-beta.1 for Angular >= 6
• v2.3.1 for Angular < 6 (Please refer to https://github.com/xieziyu/ngx-echarts/blob/v2.x/README.md)

Github branches:

• master for Angular >= 6
• v2.x for Angular < 6

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

Latest Update

• 2018.08.10: v4.0.0-beta.1

  • New: [detectEventChanges] Use it to avoid unwanted change detections.
    • If you set it false, chartClick and some other event-emitters become silent. demo
  • Change: [theme] now detect changes at runtime.
    • When you change theme at runtime, the chart would be destroyed first and then initialized again. demo

• 2018.08.03: v4.0.0-beta.0 (thanks to smnbbrv)

  • BREAKING CHANGES:
    • ES6 import instead of polluting global namespace. issue #123
    • NgxEchartsService is now obsoleted. If you want to use echarts API, please just import it

    import * as echarts from 'echarts';
    /** or */
    import { graphic, registerMap } from 'echarts';
    

    • No need to configure angular.json any more. But we still need to configure tsconfig.json currently.
    • Import echarts theme files or other extension files in main.ts. Refer to ECharts Extensions

• 2018.07.24: v3.2.0 & v2.3.1:

  • New: [autoResize] now detects its container element's offset height.
  • Change: Resizing detection is now debounced.

• 2018.06.13: v3.1.0 & v2.2.0:

  • New: [autoResize] now detects its container element's offset width. Especially useful for charts inside <ng-template> such as NG-ZORRO components.

• 2018.06.12: v3.0.1 & v2.1.1:

  • Bugfix: Line chart is not animated on init. issue#102

• 2018.05.08: v3.0.0:

  • Change: Support Angular 6
  • Docs: generate demo app by @angular/cli-6.0.0

• 2018.03.14: v2.1.0

  • New: [loadingOpts] to customize loading style. Refer to API
  • Bugfix: double check dom.style.height before setting default value.

• 2018.02.07: v2.0.2. New: [autoResize] input (default: true). PR #73 by arethore-actility

• 2017.12.11: v2.0.1. Fix issue: No change detection involved in event handler. Refer to issue #26, #28

• 2017.12.04: v2.0.0. Provide an echarts wrapper service: NgxEchartsService.

• 2017.11.25: v2.0.0-beta.0. It has some BREAKING CHANGES you should know.

Installation

• Since v4.0

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

• tsconfig.json: You need to map the echarts path to minified version of echarts in the compilerOptions of "tsconfig.json" in your project's root (this is important for AoT build):

  {
    ...,
    "compilerOptions": {
      ...,
  +    "paths": {
  +      "echarts": ["node_modules/echarts/dist/echarts.min.js"]
  +    }
    }
  }
  

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
     ],
     ...
   })
   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 { EChartOption } from 'echarts';
     
     // ...
     
     chartOption: EChartOption = {
       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 porperties:

Input	Type	Default	Description
[options]	object	null	It's the same with the options in official demo site.
[merge]	object	null	You can use it to update 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. So you can refer to ECharts documentation for details
[loading]	boolean	false	Use it to toggle the echarts loading animation when your data is not ready.
[autoResize]	boolean	true	Charts will be automatically resized when container's width 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	Use it to init echarts with theme. You need to import the theme file in main.ts.
[loadingOpts]	object	null	Input an object to customize loading style. Refer to ECharts documentation for details.
[detectEventChanges]	boolean	true	Whether to register mouse event handlers on echartInstance. Use it to avoid unwanted change detections.

By default, loadingOpts is:

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

ECharts API

If you need echarts API such as echarts.graphic, please import it from echarts. For example:

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

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

/** or you can */
import { graphic } from 'echarts';

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

ECharts Instance

echartsInstance is exposed (since v1.1.6) in (chartInit) event. So you can directly call the APIs just like: resize(), showLoading(), etc. For example:

• html:

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

• component:

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

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

ECharts Extensions

Import echarts theme files or other extension files in main.ts. For example:

  import { enableProdMode } from '@angular/core';
  import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';

  import { AppModule } from './app/app.module';
  import { environment } from './environments/environment';

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

  if (environment.production) {
    enableProdMode();
  }

  platformBrowserDynamic().bootstrapModule(AppModule)
    .catch(err => console.log(err));

Service

NgxEchartsService has been obsoleted since v4.0

Events

As echarts support the 'click', 'dblclick', 'mousedown', 'mouseup', 'mouseover', 'mouseout', 'globalout' mouse events, our ngx-echarts directive also support the same mouse events but with additional chart prefix.

• 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:

• chartClick: It emits the same params of 'click' event
• chartDblClick: It emits the same params of 'dblclick' event
• chartMouseDown: It emits the same params of 'mousedown' event
• chartMouseUp: It emits the same params of 'mouseup' event
• chartMouseOver: It emits the same params of 'mouseover' event
• chartMouseOut: It emits the same params of 'mouseout' event
• chartGlobalOut: It emits the same params of 'globalout' event
• chartContextMenu: It emits the same params of 'contextmenu' event (since v1.2.1)
• chartDataZoom: It emits the same params of 'dataZoom' event (thanks to averhaegen)

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 the detailed example.

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 to: http://localhost:4202