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How to validate GUID from a string in Javascript?

Given string str, the task is to check whether the given string is valid GUID (Globally Unique Identifier) or not by using Regular Expression.

The valid GUID (Globally Unique Identifier) must specify the following conditions:

1. It should be a 128-bit number.
2. It should be 36 characters (32 hexadecimal characters and 4 hyphens) long.
3. It should be displayed in five groups separated by hyphens (-).
4. Microsoft GUIDs are sometimes represented with surrounding braces.


Input: str = “123e4567-e89b-12d3-a456-9AC7CBDCEE52” 
Output: true 
The given string satisfies all the above mentioned conditions. Therefore, it is a valid GUID (Globally Unique Identifier).
Input: str = “123e4567-h89b-12d3-a456-9AC7CBDCEE52” 
Output: false 
The given string contains ‘h’, the valid hexadecimal characters should be followed by character from a-f, A-F, and 0-9. Therefore, it is not a valid GUID (Globally Unique Identifier).
Input: str = “123e4567-h89b-12d3-a456” 
Output: false 
The given string has 20 characters. Therefore, it is not a valid GUID (Globally Unique Identifier). 

The idea is to use Regular Expression to solve this problem. The following steps can be followed to compute the answer:

1. Get the String.
2. Create a regular expression to check valid GUID (Globally Unique Identifier) as mentioned below:

regex =^[{]?[0-9a-fA-F]{8}-([0-9a-fA-F]{4}-){3}[0-9a-fA-F]{12}[}]?$


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