OP question was not really targeted at this answer - "02/05/2018" is clearly a different string compared to "05.02.2018" but both strings should point to the same date ;-)
>>moment.js should be able to cope with these
>>
>>>This should be an easy question. I have two datetime strings like "02/05/2018 12:00" and "02/18/2018 14:41". I want to compare date portions of these strings to find if they are the same or different.
>>>How can I do it?
>
>I used this code which seems to work:
>
>
>let newDate = new Date(new Date(val).toDateString());
> let originalDate = new Date(new Date(modelValue).toDateString());
> if (newDate.valueOf() !== originalDate.valueOf()) {
>
>based on suggestion in StackOverflow.