JavaScript: Check whether the given argument is a native boolean element
JavaScript fundamental (ES6 Syntax): Exercise-204 with Solution
Write a JavaScript program that checks if the given argument is a native Boolean element.
- Use typeof to check if a value is classified as a boolean primitive.
Sample Solution:
JavaScript Code:
//#Source https://bit.ly/2neWfJ2
const isBoolean = val => typeof val === 'boolean';
console.log(isBoolean(null));
console.log(isBoolean(false));
Sample Output:
false true
Flowchart:

Live Demo:
See the Pen javascript-basic-exercise-204-1 by w3resource (@w3resource) on CodePen.
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Previous: Write a JavaScript program to determine whether the current runtime environment is a browser so that front-end modules can run on the server (Node) without throwing errors.
Next: Write a JavaScript program to check whether the provided argument is array-like (i.e. is iterable).
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