@terminus/ngx-tools
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18 lines • 3.4 kB
JavaScript
export function coerceNumberProperty(value, fallbackValue) {
if (fallbackValue === void 0) { fallbackValue = 0; }
return isNumberValue(value) ? Number(value) : fallbackValue;
}
/**
* Whether the provided value is considered a number.
*
* ParseFloat(value) handles most of the cases we're interested in (it treats null, empty string,
* and other non-number values as NaN, where Number just uses 0) but it considers the string
* '123hello' to be a valid number. Therefore we also check if Number(value) is NaN.
* NOTE: TypeScript seems to consider `parseFloat(value)` unsafe. In my tests there are no values which `parseFloat`
* cannot handle safely.
*
* @private
* @param value
*/
export var isNumberValue = function (value) { return !isNaN(parseFloat(value)) && !isNaN(Number(value)); };
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