To test for a URL string, use regular expression.
Example
Following is the code −
var regularExpressionForURL = /^https?:\/\//i; var originalURL1 = "https://www.example.com/index"; var originalURL2 = "/index"; if (regularExpressionForURL.test(originalURL1)) { console.log("This is absolute URL"); } else { console.log("This is relative URL"); } if (regularExpressionForURL.test(originalURL2)) { console.log("This is absolute URL"); } else { console.log("This is relative URL"); }
To run the above program, you need to use the following command −
node fileName.js.
Here, my file name is demo266.js
Output
This will produce the following output on console −
PS C:\Users\Amit\javascript-code> node demo266.js This is absolute URL This is relative URL