JavaScript: Check a string is in Kebab case

JavaScript String: Exercise-54 with Solution

Check Kebab Case

Kebab case: "the-quick-brown-fox-jumps-over-the-lazy-dog"
Similar to snake case, above, except hyphens rather than underscores are used to replace spaces. It is also known as spinal case, param case, Lisp case in reference to the Lisp programming language, or dash case (or illustratively as kebab-case).
Write a JavaScript function to check a given string is in Kebab case or not.
Test Data:
('j') -> false
('Java-Exercises') -> true
('JavaScript-Exercises') -> true
('javascript_exercises') -> false
(12356) -> "It must be a string."

Sample Solution:

JavaScript Code:

 // Define a function called 'test' that takes one parameter 'text'.
const test = (text) => {
  // Check if the type of the 'text' parameter is not a string.
  if (typeof text !== 'string') {
    // If it's not a string, return the message "It must be a string."
    return 'It must be a string.';
  }
  // Define a regular expression pattern that matches strings containing a hyphen between words.
  const pattern = /(\w+)-(\w)([\w-]*)/;
  // Return true if the input text matches the pattern and does not contain an underscore, otherwise return false.
  return pattern.test(text) && !text.includes('_');
}

// Test the 'test' function with different inputs and log the results.
console.log(test('j'));
console.log(test('Java-Exercises'));
console.log(test('JavaScript-Exercises'));
console.log(test('javascript_exercises'));
console.log(test(12356));

Output:

false
true
true
false
It must be a string.

Explanation:

The above JavaScript code defines a function "test()" that checks whether a given input text meets certain criteria:

• It ensures that the input parameter 'text' is a string. If not, it returns the message "It must be a string."
• It defines a regular expression pattern that matches strings containing a hyphen between words. The pattern is /(\w+)-(\w)([\w-]*)/.
• It returns 'true' if the input text matches the defined pattern and does not contain an underscore (_), indicating that it follows the specified format. Otherwise, it returns 'false'.

Flowchart:

Live Demo:

See the Pen javascript-string-exercise-54 by w3resource (@w3resource) on CodePen.

For more Practice: Solve these Related Problems:

• Write a JavaScript function that checks if a string is in kebab-case (all lowercase words separated by hyphens) using regex.
• Write a JavaScript function that validates a string and returns true if it matches the kebab-case pattern.
• Write a JavaScript function that compares the input string to its kebab-case converted version to determine compliance.
• Write a JavaScript function that handles edge cases like empty strings and non-string inputs when checking for kebab case.

Improve this sample solution and post your code through Disqus.

Previous: Check a string is in Flat case.
Next: Check a string is a Pangram or not.