I find myself puzzled by the outcome of the TypeScript expression.
selectedLocaleForm: number = 0;
locales: number[] = [0, 1];
index(index: number)` {
let result = index * this.locales.length + this.selectedLocaleForm;
console.log(result);
return result;
}
When I input 0 into the function, it gives back 0 as expected.
I am curious why the index function returns '01' when this.selectedLocaleForm gets updated in the HTML select block?
What causes the index function to return '01' after updating this.selectedLocaleForm in an HTML select block?
The reason behind this behavior is that this.selectedLocaleForm is treated as a string.
selectedLocaleForm has been declared as a numberIt is possible to still input a string into it, for example:
this.selectedLocaleForm = 'some string` as unknown as string;
In your scenario, the string is most likely being added through your HTML template.
To address this issue, specify selectedLocaleForm as a string and convert it to a number using + as illustrated below:
selectedLocaleForm: string = '0';
locales: number[] = [0, 1];
index(index: number)` {
let result = index * this.locales.length + (+this.selectedLocaleForm);
console.log(result);
return result;
}
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