The Angular2 error message informs that the type 'number' cannot be assigned to the type 'NumberConstructor'

Within the Angular2 program below, I am attempting to have the system randomly select four choices from either 0 or 1. The desired output is achieved without any errors being reported in the console. However, my IDE is displaying the following error message:

https://i.sstatic.net/AosIk.png

I attempted changing Number to number but this resulted in a different error:

https://i.sstatic.net/RhplA.png

Component Code

import {Component} from 'angular2/core';
import {OnInit} from 'angular2/core';

@Component(
{
    selector: 'puzzle',
    template: `
        <section class="combination">
            I:   {{ switch1Number }}<br>
            II:  {{ switch2Number }}<br>
            III: {{ switch3Number }}<br>
            IV:  {{ switch4Number }}
        </section>
    `
})

export class PuzzleComponent implements OnInit {
    switch1Number = Number;
    switch2Number = Number;
    switch3Number = Number;
    switch4Number = Number;

    ngOnInit() {
        // Math.randon gives a random decimal value between 0 & 1.
        // Math..round rounds it to 0 or 1
        this.switch1Number = Math.round(Math.random());
        this.switch2Number = Math.round(Math.random());
        this.switch3Number = Math.round(Math.random());
        this.switch4Number = Math.round(Math.random());

        console.log(this.switch1Number, this.switch2Number, this.switch3Number, this.switch4Number);
    }
}

Answer №1

Substitute Number with number in

switch1Number = Number

the correct format should be

switch1Number: number;

Number is not a variable type, it's a numeric constructor, similar to how String is a string data constructor.

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