JavaScript Validation with regular expression - Exercises, Practice, Solution

JavaScript Validation with regular expression [21 exercises with solution]

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1. Check Uppercase First

Write a JavaScript program to test whether the first character of a string is uppercase or not.
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2. Validate Credit Card

Write a JavaScript program to check a credit card number.
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3. Email Pattern

Write a pattern that matches e-mail addresses.
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.

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4. Search Date in String

Write a JavaScript program to search a date within a string.

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5. Regex Trim Function

Write a JavaScript program that works as a regular expression trim function (string).

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6. Count Words in String

Write a JavaScript program to count number of words in string.
Note :
- Remove white-space from start and end position.
- Convert 2 or more spaces to 1.
- Exclude newline with a start spacing.

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7. Validate IP Address

Write a JavaScript function to check whether a given value is IP value or not.

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8. Count Vowels

Write a JavaScript function to count the number of vowels in a given string.
Test Data :
console.log(alphabetize_string('United States'));
Output :
"SUadeeinsttt"

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9. Validate URL

Write a JavaScript function to check whether a given value is a valid URL or not.

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10. Check Alphanumeric

Write a JavaScript function to check whether a given value is alpha numeric or not.

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11. Validate Time String

Write a JavaScript function to check whether a given value is a time string or not.

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12. Validate US Zip Code

Write a JavaScript function to check whether a given value is a US zip code or not.

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13. Validate UK Post Code

Write a JavaScript function to check whether a given value is a UK Post Code or not.

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14. Validate Canada Post Code

Write a JavaScript function to check whether a given value is a Canada Post Code or not.

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15. Validate SSN

Write a JavaScript function to check whether a given value is a social security number or not.

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16. Validate Hexadecimal

Write a JavaScript function to check whether a given value is a hexadecimal value or not.

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17. Validate Hex Color

Write a JavaScript function to check whether a given value is a hexcolor value or not.

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18. Validate Domain

Write a JavaScript function to check whether a given value represents a domain.

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19. Validate HTML Content

Write a JavaScript function to check whether a given value is HTML or not.

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20. Alpha-Dash-Underscore Check

Write a JavaScript function to check if a given value contains alpha, a dash and an underscore.

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21. Thousands Separator

Write a JavaScript function to print an integer with thousands separated by commas.

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"

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More to Come !

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