w3resource

JavaScript: Check whether a string is blank or not

JavaScript String: Exercise-2 with Solution

Write a JavaScript function to check whether a string is blank or not.

Test Data :
console.log(is_Blank(''));
console.log(is_Blank('abc'));
true
false

Pictorial Presentation:

JavaScript: Check whether a string is blank or not

Sample Solution:-

HTML Code:

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>JS string : is blank</title>
</head>
<body>
</body>
</html>

JavaScript Code:

is_Blank =  function(input) {
        if (input.length === 0)
        return true;
        else 
        return false;
      }
console.log(is_Blank(''));
console.log(is_Blank('abc'));

Sample Output:

true
false

Flowchart:

Flowchart: JavaScript- Check whether a string is blank or not

Live Demo:

See the Pen JavaScript Check whether a string is blank or not - string-ex-2 by w3resource (@w3resource) on CodePen.


Improve this sample solution and post your code through Disqus

Previous: Write a JavaScript function to check whether an 'input' is a string or not.
Next: Write a JavaScript function to split a string and convert it into an array of words.

What is the difficulty level of this exercise?

Test your Programming skills with w3resource's quiz.



Share this Tutorial / Exercise on : Facebook and Twitter

JavaScript: Tips of the Day

Tagged template literals

function getPersonInfo(one, two, three) {
  console.log(one);
  console.log(two);
  console.log(three);
}

const person = 'Lydia';
const age = 21;

getPersonInfo`${person} is ${age} years old`;

If you use tagged template literals, the value of the first argument is always an array of the string values. The remaining arguments get the values of the passed expressions!

Ref: https://bit.ly/323Y0P6