jqwidgets-framework/demos/Angular/src/complexinput/spinbuttons/app.component.html

jQWidgets is an advanced Angular, Vue, Blazor, React, Web Components, jquery, ASP .NET MVC, Custom Elements and HTML5 UI framework.

<jqxComplexInput 
    [width]="250" [height]="25" [value]="'15 + 7.2i'" 
    [spinButtons]="true" [spinButtonsStep]="1">
</jqxComplexInput>