You also need to use regex \\ to match “\” (back-slash). matches “.” regex \ matches “ ” and regex \( matches “(”. To match a character having special meaning in regex, you need to use a escape sequence prefix with a backslash ( \ ). If both conditions are met, the date is between the two dates.2 How do you add expressions in regex? Check if the date is greater than the start date and less than the end date. To check if a date is between two dates: Use the Date() constructor to convert the dates to Date objects. How do you check if a date lies between two dates in JavaScript? Step 2: Add a validation rule for the format checking.And how can I seperate the DD / MM / YYYY. Add an open ended question to the script, where you want the Date value to be entered: I tried to check if its valid with regular expression but I always get an alert even if I type the date correctly. Step 1: Create an open ended question to hold the Date string format.How To Validate Date Format Using Regular Expression If the ISO representation of the Date object starts with the provided string, we can conclude that the date string is valid and formatted as YYYY-MM-DD. The toISOString() method returns a string formatted as YYYY-MM-DDTHH:mm:ss. ^(0?||3)(0?|1)\d: It tells the computer to repeat the preceding character (or set of characters) for as many times as the value inside this bracket.0 How do you check if it is a date format in JavaScript?
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