js-coding-challenges

Challenge 20: Check String Url

Write a function that takes a url string as input and returns true if url is valid and false otherwise. For example, if the string is “https://www.example.com”, the function should return true.

Write a function called isValidURL that takes a string url as url in its parameter and returns true or false.

Answer

// Function to check string url
function isValidURL(url) {
  // Regular expression pattern for URL validation
  const urlPattern = /^(https?:\/\/)?[\w\-]+(\.[\w\-]+)+[/#?]?.*$/i;

  // Test if the string matches the URL pattern
  return urlPattern.test(url);
}

Answer Explanation

The isValidURL function takes a string as input and uses a regular expression to check if it’s a valid URL. The regular expression ^(https?:\/\/)?[\w\-]+(\.[\w\-]+)+[/#?]?.*$ is used to match the URL pattern.

The test method is then used to check if the input string matches the regular expression, if it’s a valid URL function returns true otherwise false.

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