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JavaScript Validation - Exercises, Practice, Solution

JavaScript validation [10 exercises with solution]

[An editor is available at the bottom of the page to write and execute the scripts.]

1. Write a JavaScript function to validate whether a given value type is boolean or not. Go to the editor

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2. Write a JavaScript function to validate whether a given value type is error or not. Go to the editor

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3. Write a JavaScript function to validate whether a given value type is NaN or not. Go to the editor

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4. Write a JavaScript function to validate whether a given value type is null or not. Go to the editor

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5. Write a JavaScript function to validate whether a given value is number or not. Go to the editor

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6. Write a JavaScript function to validate whether a given value is object or not. Go to the editor

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7. Write a JavaScript function to validate whether a given value type is pure json object or not. Go to the editor

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8. Write a JavaScript function to validate whether a given value is RegExp or not. Go to the editor

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9. Write a JavaScript function to validate whether a given value type is char or not. Go to the editor

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10. Write a JavaScript function to check whether given value types are same or not. Go to the editor

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More to Come !

* To run the code mouse over on Result panel and click on 'RERUN' button.*

Live Demo:

See the Pen javascript-common-editor by w3resource (@w3resource) on CodePen.


Do not submit any solution of the above exercises at here, if you want to contribute go to the appropriate exercise page.



JavaScript: Tips of the Day

Regular functions

function giveOwenBurger() {
  return 'Here is burger!';
}

const giveOwenCocacola = () =>
  "Here's cocacola... now go hit the gym already.";

console.log(giveOwenBurger.prototype);
console.log(giveOwenCocacola.prototype);

Regular functions, such as the giveOwenPizza function, have a prototype property, which is an object (prototype object) with a constructor property. Arrow functions however, such as the giveOwenCocacola function, do not have this prototype property. undefined gets returned when trying to access the prototype property using giveOwenCocacola.prototype.

Ref: https://bit.ly/3jFRBje