ngx-numaric-keypad/lib/keypad.component.d.ts

This is a two in one features keypad, you can use this as calculator also by just enabling that feature.

import { OnInit, EventEmitter } from '@angular/core';
export declare class KeypadComponent implements OnInit {
    calc: boolean;
    getVal: EventEmitter<any>;
    currentNumber: string;
    firstOperand: any;
    operator: any;
    waitForSecondNumber: boolean;
    equalSign: boolean;
    constructor();
    ngOnInit(): void;
    getNumber(v: string): void;
    backSpace(): void;
    getDecimal(): void;
    private doCalculation;
    getOperation(op: string): void;
    clear(): void;
}