Set the disabled state

import { Component } from '@angular/core';
import { ItemModel } from '@syncfusion/ej2-angular-splitbuttons';

@Component({
    selector: 'app-root',
    template: `<!-- To Render splitbutton. -->
               <ejs-splitbutton content="Autosum" [items]='items' iconCss="e-sb e-sigma" disabled= true></ejs-splitbutton>`
})

export class AppComponent {
  public items: ItemModel[] = [
      {
        text: 'Autosum'
    },
    {
        text: 'Average'
    },
    {
        text: 'Count numbers',
    },
    {
        text: 'Min'
    },
    {
        text: 'Max'
    }];
}

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AppComponent } from './app.component';
import { SplitButtonModule } from '@syncfusion/ej2-angular-splitbuttons';

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule,
        SplitButtonModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent]
})
export class AppModule { }

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

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);