Demos
Chart(Angular)
Line & Area Charts
Line with Gaps

Line with Gaps (Angular)

The FlexChart control allows you to display lines with gaps if there is no data to be displayed. This is done by setting FlexChart's interpolateNulls property.

Learn about FlexChart | Interpolate Nulls Documentation] | FlexChart API Reference

This example uses Angular.

JavaScript
Angular
Vue
React
app.component.ts
index.html
app.component.html
app.data.ts
styles.css
Copy to CodeMine
import 'bootstrap.css';
import '@mescius/wijmo.styles/wijmo.css';
import './styles.css';
//
import { isArray } from '@mescius/wijmo';
import { Palettes } from '@mescius/wijmo.chart';

import '@angular/compiler';
import { Component, Inject, enableProdMode, ɵresolveComponentResources } from '@angular/core';

import { BrowserModule, bootstrapApplication } from '@angular/platform-browser';
import { FormsModule } from '@angular/forms';
import { WjChartModule } from '@mescius/wijmo.angular2.chart';
import { WjChartAnimationModule } from '@mescius/wijmo.angular2.chart.animation';
import { DataService } from './app.data';
//
@Component({
  standalone: true,
  providers: [DataService],
  imports: [WjChartModule, WjChartAnimationModule, FormsModule, BrowserModule],
  selector: 'app-component',
  templateUrl: 'src/app.component.html',
})
export class AppComponent {
  data: any;
  palette: string[];
  interpolateNulls: boolean;
  //
  constructor(@Inject(DataService) private dataService: DataService) {
    this.data = dataService.getData();
    this.palette = this._getRandomPalette();
    this.interpolateNulls = false;
  }
  //
  private _getRandomPalette() {
    let palettes = Object.keys(Palettes).filter((prop) => isArray(Palettes[prop]));
    let rand = Math.floor(Math.random() * palettes.length);
    //
    return Palettes[palettes[rand]];
  }
}
//

//
enableProdMode();

// Resolve resources (templateUrl, styleUrls etc), After resolution all URLs have been converted into `template` strings.
ɵresolveComponentResources(fetch).then(() => {
  // Bootstrap application
  bootstrapApplication(AppComponent).catch((err) => console.error(err));
});
import 'bootstrap.css'; import '@mescius/wijmo.styles/wijmo.css'; import './styles.css'; // import { isArray } from '@mescius/wijmo'; import { Palettes } from '@mescius/wijmo.chart'; import '@angular/compiler'; import { Component, Inject, enableProdMode, ɵresolveComponentResources } from '@angular/core'; import { BrowserModule, bootstrapApplication } from '@angular/platform-browser'; import { FormsModule } from '@angular/forms'; import { WjChartModule } from '@mescius/wijmo.angular2.chart'; import { WjChartAnimationModule } from '@mescius/wijmo.angular2.chart.animation'; import { DataService } from './app.data'; // @Component({ standalone: true, providers: [DataService], imports: [WjChartModule, WjChartAnimationModule, FormsModule, BrowserModule], selector: 'app-component', templateUrl: 'src/app.component.html', }) export class AppComponent { data: any; palette: string[]; interpolateNulls: boolean; // constructor(@Inject(DataService) private dataService: DataService) { this.data = dataService.getData(); this.palette = this._getRandomPalette(); this.interpolateNulls = false; } // private _getRandomPalette() { let palettes = Object.keys(Palettes).filter((prop) => isArray(Palettes[prop])); let rand = Math.floor(Math.random() * palettes.length); // return Palettes[palettes[rand]]; } } // // enableProdMode(); // Resolve resources (templateUrl, styleUrls etc), After resolution all URLs have been converted into `template` strings. ɵresolveComponentResources(fetch).then(() => { // Bootstrap application bootstrapApplication(AppComponent).catch((err) => console.error(err)); });
<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <title>MESCIUS Wijmo FlexChart Line with Gaps</title> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <!-- Polyfills --> <script src="node_modules/core-js/client/shim.min.js"></script> <script src="node_modules/zone.js/fesm2015/zone.min.js"></script> <!-- SystemJS --> <script src="https://cdnjs.cloudflare.com/ajax/libs/systemjs/0.21.5/system.src.js" integrity="sha512-skZbMyvYdNoZfLmiGn5ii6KmklM82rYX2uWctBhzaXPxJgiv4XBwJnFGr5k8s+6tE1pcR1nuTKghozJHyzMcoA==" crossorigin="anonymous"></script> <script src="systemjs.config.js"></script> <script> // workaround to load 'rxjs/operators' from the rxjs bundle System.import('rxjs').then(function (m) { System.set(SystemJS.resolveSync('rxjs/operators'), System.newModule(m.operators)); System.import('./src/app.component'); }); </script> </head> <body> <app-component></app-component> </body> </html>
<div class="container-fluid"> <div class="form-check"> <label for="interpolateNulls" class="form-check-label">interpolateNulls:</label> <input id="interpolateNulls" type="checkbox" class="form-check-input" [(ngModel)]="chart.interpolateNulls"> </div> <wj-flex-chart #chart [itemsSource]="data" header="24 Hours CPU Utilization and Temperature" bindingX="time" chartType="Line" [interpolateNulls]="interpolateNulls" [palette]="palette"> <wj-flex-chart-legend position="None"></wj-flex-chart-legend> <wj-flex-chart-series binding="utilization" name="Utilization(%)"></wj-flex-chart-series> <wj-flex-chart-series binding="temperature" name="Temperature(°C)"></wj-flex-chart-series> <wj-flex-chart-animation animationMode="Point"></wj-flex-chart-animation> </wj-flex-chart> </div>
import { Injectable } from '@angular/core'; // @Injectable() export class DataService { getData() { return [ { time: '1:00', utilization: 26, temperature: 55 }, { time: '2:00', utilization: 36, temperature: 57 }, { time: '3:00', utilization: 74, temperature: 60 }, { time: '4:00', utilization: 23, temperature: 46 }, { time: '5:00', utilization: 13, temperature: 44 }, { time: '6:00', utilization: 64, temperature: 56 }, { time: '7:00', utilization: 34, temperature: 50 }, { time: '8:00', utilization: 67, temperature: 55 }, { time: '9:00', utilization: 72, temperature: 60 }, { time: '10:00', utilization: 23, temperature: 54 }, { time: '11:00', utilization: 100, temperature: 78 }, { time: '12:00', utilization: 100, temperature: 87 }, { time: '13:00', utilization: 100, temperature: 94 }, { time: '14:00', utilization: null, temperature: null }, { time: '15:00', utilization: 95, temperature: 87 }, { time: '16:00', utilization: 80, temperature: 84 }, { time: '17:00', utilization: 53, temperature: 76 }, { time: '18:00', utilization: 26, temperature: 58 }, { time: '19:00', utilization: 42, temperature: 53 }, { time: '20:00', utilization: 36, temperature: 62 }, { time: '21:00', utilization: 34, temperature: 53 }, { time: '22:00', utilization: 63, temperature: 61 }, { time: '23:00', utilization: 53, temperature: 57 }, { time: '24:00', utilization: 54, temperature: 47 } ]; } }
label { margin-right: 3px; } body { margin-bottom: 24px; }
(function (global) { SystemJS.config({ transpiler: './plugin-typescript.js', typescriptOptions: { "target": "ES2022", "module": "system", "emitDecoratorMetadata": true, "experimentalDecorators": true, }, baseURL: 'node_modules/', meta: { 'typescript': { "exports": "ts" }, '*.css': { loader: 'systemjs-plugin-css' }, '*.mjs': { format: 'esm' }, }, paths: { // paths serve as alias 'npm:': '' }, packageConfigPaths: [ '/node_modules/*/package.json', "/node_modules/@angular/*/package.json", "/node_modules/@mescius/*/package.json" ], map: { 'core-js': 'https://cdn.jsdelivr.net/npm/core-js@2.6.12/client/shim.min.js', 'typescript': 'https://cdnjs.cloudflare.com/ajax/libs/typescript/5.2.2/typescript.min.js', "rxjs": "https://cdnjs.cloudflare.com/ajax/libs/rxjs/7.8.1/rxjs.umd.min.js", 'systemjs-plugin-css': 'https://cdn.jsdelivr.net/npm/systemjs-plugin-css@0.1.37/css.js', '@mescius/wijmo': 'npm:@mescius/wijmo/index.js', '@mescius/wijmo.input': 'npm:@mescius/wijmo.input/index.js', '@mescius/wijmo.styles': 'npm:@mescius/wijmo.styles', '@mescius/wijmo.cultures': 'npm:@mescius/wijmo.cultures', '@mescius/wijmo.chart': 'npm:@mescius/wijmo.chart/index.js', '@mescius/wijmo.chart.analytics': 'npm:@mescius/wijmo.chart.analytics/index.js', '@mescius/wijmo.chart.animation': 'npm:@mescius/wijmo.chart.animation/index.js', '@mescius/wijmo.chart.annotation': 'npm:@mescius/wijmo.chart.annotation/index.js', '@mescius/wijmo.chart.finance': 'npm:@mescius/wijmo.chart.finance/index.js', '@mescius/wijmo.chart.finance.analytics': 'npm:@mescius/wijmo.chart.finance.analytics/index.js', '@mescius/wijmo.chart.hierarchical': 'npm:@mescius/wijmo.chart.hierarchical/index.js', '@mescius/wijmo.chart.interaction': 'npm:@mescius/wijmo.chart.interaction/index.js', '@mescius/wijmo.chart.radar': 'npm:@mescius/wijmo.chart.radar/index.js', '@mescius/wijmo.chart.render': 'npm:@mescius/wijmo.chart.render/index.js', '@mescius/wijmo.chart.webgl': 'npm:@mescius/wijmo.chart.webgl/index.js', '@mescius/wijmo.chart.map': 'npm:@mescius/wijmo.chart.map/index.js', '@mescius/wijmo.gauge': 'npm:@mescius/wijmo.gauge/index.js', '@mescius/wijmo.grid': 'npm:@mescius/wijmo.grid/index.js', '@mescius/wijmo.grid.detail': 'npm:@mescius/wijmo.grid.detail/index.js', '@mescius/wijmo.grid.filter': 'npm:@mescius/wijmo.grid.filter/index.js', '@mescius/wijmo.grid.search': 'npm:@mescius/wijmo.grid.search/index.js', '@mescius/wijmo.grid.style': 'npm:@mescius/wijmo.grid.style/index.js', '@mescius/wijmo.grid.grouppanel': 'npm:@mescius/wijmo.grid.grouppanel/index.js', '@mescius/wijmo.grid.multirow': 'npm:@mescius/wijmo.grid.multirow/index.js', '@mescius/wijmo.grid.transposed': 'npm:@mescius/wijmo.grid.transposed/index.js', '@mescius/wijmo.grid.transposedmultirow': 'npm:@mescius/wijmo.grid.transposedmultirow/index.js', '@mescius/wijmo.grid.pdf': 'npm:@mescius/wijmo.grid.pdf/index.js', '@mescius/wijmo.grid.sheet': 'npm:@mescius/wijmo.grid.sheet/index.js', '@mescius/wijmo.grid.xlsx': 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'npm:@mescius/wijmo.angular2.barcode.specialized/index.js', 'bootstrap.css': 'npm:bootstrap/dist/css/bootstrap.min.css', 'jszip': 'https://cdnjs.cloudflare.com/ajax/libs/jszip/3.10.1/jszip.min.js', '@angular/core': 'npm:@angular/core/fesm2022/core.mjs', '@angular/core/primitives/signals': 'npm:@angular/core/fesm2022/primitives/signals.mjs', '@angular/core/primitives/event-dispatch': 'npm:@angular/core/fesm2022/primitives/event-dispatch.mjs', '@angular/common': 'npm:@angular/common/fesm2022/common.mjs', '@angular/common/http': 'npm:@angular/common/fesm2022/http.mjs', '@angular/compiler': 'npm:@angular/compiler/fesm2022/compiler.mjs', '@angular/platform-browser': 'npm:@angular/platform-browser/fesm2022/platform-browser.mjs', '@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic/fesm2022/platform-browser-dynamic.mjs', '@angular/http': 'npm:@angular/http/fesm2022/http.mjs', '@angular/router': 'npm:@angular/router/fesm2022/router.mjs', '@angular/forms': 'npm:@angular/forms/fesm2022/forms.mjs', }, // packages tells the System loader how to load when no filename and/or no extension packages: { "./src": { defaultExtension: 'ts' }, "node_modules": { defaultExtension: 'js' }, wijmo: { defaultExtension: 'js', } } }); })(this);