To fix moment.js isValid function not working properly with JavaScript, we can enable strict validation.
For instance, we write
const isValid = moment("It is 2022-05-25", "YYYY-MM-DD").isValid();
const isValid2 = moment("It is 2022-05-25", "YYYY-MM-DD", true).isValid();
to call moment with true as the 3rd argument so that isValid will make sure the date string in the first argument of moment exactly follows the format specified in the string in the 2nd argument.
Therefore, isValid is true, but isValid2 is false since the date string doesn’t exactly follow the YYYY-MM-DD format.
