JavaScript Validation with regular expression - Exercises, Practice, Solution
JavaScript Validation with regular expression [21 exercises with solution]
[An editor is available at the bottom of the page to write and execute the scripts.]1. Write a JavaScript program to test the first character of a string is uppercase or not. Go to the editor
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2. Write a JavaScript program to check a credit card number. Go to the editor
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3. Write a pattern that matches e-mail addresses. Go to the editor
The personal information part contains the following ASCII characters.
- Uppercase (A-Z) and lowercase (a-z) English letters.
- Digits (0-9).
- Characters ! # $ % & ' * + - / = ? ^ _ ` { | } ~
- Character . ( period, dot or fullstop) provided that it is not the first or last character and it will not come one after the other.
4. Write a JavaScript program to search a date within a string. Go to the editor
5. Write a JavaScript program that work as a trim function (string) using regular expression. Go to the editor
6. Write a JavaScript program to count number of words in string. Go to the editor
Note :
-
Remove white-space from start and end position.
- Convert 2 or more spaces to 1.
- Exclude newline with a start spacing.
7. Write a JavaScript function to check whether a given value is IP value or not. Go to the editor
8. Write a JavaScript function to count the number of vowels in a given string. Go to the editor
Test Data :
console.log(alphabetize_string('United States'));
Output :
"SUadeeinsttt"
9. Write a JavaScript function to check whether a given value is an valid url or not. Go to the editor
10. Write a JavaScript function to check whether a given value is alpha numeric or not. Go to the editor
11. Write a JavaScript function to check whether a given value is time string or not. Go to the editor
12. Write a JavaScript function to check whether a given value is US zip code or not. Go to the editor
13. Write a JavaScript function to check whether a given value is UK Post Code or not. Go to the editor
14. Write a JavaScript function to check whether a given value is Canada Post Code or not. Go to the editor
15. Write a JavaScript function to check whether a given value is a social security number or not. Go to the editor
16. Write a JavaScript function to check whether a given value is hexadecimal value or not. Go to the editor
17. Write a JavaScript function to check whether a given value is hexcolor value or not. Go to the editor
18. Write a JavaScript function to check whether a given value represents a domain or not. Go to the editor
19. Write a JavaScript function to check whether a given value is html or not.Go to the editor
20. Write a JavaScript function to check a given value contains alpha, dash and underscore. Go to the editor
21. Write a JavaScript function to print an integer with commas as thousands separators. Go to the editor
Test Data :
console.log(thousands_separators(1000));
"1,000"
console.log(thousands_separators(10000.23));
"10,000.23"
console.log(thousands_separators(100000));
"100,000"
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.
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