Useful string helpers

This is a string library that contains all the functions I wish were available in JS. I took inpiration from the laravel string helper methods here

Status Badge

Examples

toSnakeCase

The toSnakeCase function returns everything after the given value in a string. The entire string will be returned if the value does not exist within the string:

const wordToSnakeCase = toSnakeCase('I will be in snakecase');

// 'i_will_be_in_snakecase'

It also allows you to pass the delimiter of your choice

const wordToSnakeCase = toSnakeCase('I will be in snakecase', '*');

// 'i**will**be**in**snakecase'

after

The after function returns everything after the given value in a string. The entire string will be returned if the value does not exist within the string:

const after = after('I will not come back here with the same', 'back');

// 'here with the same'

after last

The afterLast method returns everything after the last occurrence of the given value in a string. The entire string will be returned if the value does not exist within the string:

const after = afterLast(
  'I only return the last occurence of the string passed',
  'the'
);

// 'string passed'

before

The before method returns everything before the given value in a string. The entire string will be returned if the value does not exist within the string:

const beforeWord = before(
  'I only return the strings before the occurence of the string passed',
  'occurence'
);

// 'I only return the strings before the'

before last

The beforeLast method returns everything before the last occurence of the given value in a string. The entire string will be returned if the value does not exist within the string:

const beforeLast = beforeLast(
  'I only return the strings before the last occurence of the string passed',
  'the'
);

// 'I only return the strings before the last occurence of'

between

The between method returns the portion of a string between two values:

const beforeLast = between(
  'I only return the strings between the two strings provided',
  'return',
  'two'
);

// 'I only return the strings before the last occurence of'

camel case

The toCamelCase method converts the given string to camelCase:

const camelCaseStrings = between('I should be in camel case');

// 'iShouldBeInCamelCase'

contains

The contains method determines if the given string contains the given value. This method is case sensitive:

const isInString = contains('I should be in camel case', 'be');

// 'true'

You may also pass an array of values to determine if the given string contains any of the values in the array:

const isInString = contains('I should be in camel case', ['be', 'in']);

// 'true'

contains all

The containsAll method determines if the given string contains all of the values in a given array:

const isInString = containsAll('I should be in camel case', ['be', 'camel']);

// 'true'

ends with

The endsWith method determines if the given string ends with the given value:

const endsWith = endsWith('I end with the word camel', 'camel');

// 'true'

You may also pass an array of values to determine if the given string ends with any of the values in the array:

const endsWith = endsWith('I end with the word camel', ['camel', 'word']);

// 'true'

const endsWith = endsWith('I end with the word camel', ['end', 'word']);

// 'false'

finish

The finish method adds a single instance of the given value to a string if it does not already end with that value:

const result = finish('I should finish with any string passed', '/');

// 'I should finish with any string passed/'

const result = finish('I should finish with any string passed', 'passed');

// 'I should finish with any string passed'

headline

The headline method will convert strings delimited by casing, hyphens, or underscores into a space delimited string with each word's first letter capitalized:

const result = headline('i_should_be_converted_to_an_headline');

// 'I Should Be Converted To An Headline'

const result = headline('SteveJobsAndBillGates');

// 'Steve Jobs And Bill Gates'

title case

The toTitleCase method will convert the given string to titlecase:

const result = toTitleCase('I should be converted to title case');

// 'I Should Be Converted To Title Case'

const result = toTitleCase('i_should_be_in_title_case');

// 'I Should Be In Title Case'

is uuid

The isUuid method determines if the given string is a valid UUID:

const result = isUuid('a0a2a2d2-0b87-4a18-83f2-2529882be2de');

// 'true'

const result = isUuid('a0a2a2d22529882be2de');

// 'false'

kebab case

The toKebabCase method will convert the given string to kebab-case:

const result = toKebabCase('I should be converted to kebab case');

// 'i-should-be-converted-to-kebab-case'

const result = toKebabCase('i_should_be_converted_to_kebab_case');

// 'i-should-be-converted-to-kebab-case'

limit

The limit method truncates the given string to the specified length:

const result = limit('The quick brown fox jumps over the lazy dog', 20);

// 'The quick brown fox...'

You may pass a third argument to the method to change the string that will be appended to the end of the truncated string:

const result = limit('The quick brown fox jumps over the lazy dog', 20, ' **');

// 'The quick brown fox **'

mask

The mask masks a portion of a string with a repeated character, and may be used to obfuscate segments of strings such as email addresses and phone numbers:

const result = mask('[email protected]', '*', 3);

// 'fav***************'

If needed, you provide a negative number as the third argument to the mask method, which will instruct the method to begin masking at the given distance from the end of the string:

const result = mask('[email protected]', '*', -15, 3);

// 'fav***@example.com'

If needed, you could also provide your custom mask, if not it defaults to *:

const result = mask('[email protected]', '#', 3);

// 'fav##############'

Pad Both

The padBoth method wraps Javascript's pad function, padding both sides of a string with another string until the final string reaches a desired length:

const result = padBoth('Favour', 10, '_');

// '__Favour__'

const result = padBoth('Favour', 10);

// '  Favour  '

Random

The random method generates random string based on the length passed:

const result = random(10);

// 'kxpje9dcz8'

it also converts negative values to the absolute value and generates the random string

const result = random(-20);

// 'rd0yrmbbfhypuj8dyorhs'

Remove

The remove method removes the given value or array of values from the string:

const result = remove('Peter Piper picked a peck of pickled peppers.', 'e');

// 'Ptr Pipr pickd a pck of pickld ppprs.'

You can pass an array of values to remove from the given string

const result = remove('Peter Piper picked a peck of pickled peppers.', [
  'e',
  'p',
]);

//TODO update with the correct value 'rd0yrmbbfhypuj8dyorhs'

You may also pass false as a third argument to the remove method to ignore case when removing strings.

const result = remove('Peter Piper picked a peck of pickled peppers.', 'p');

//TODO update with the correct value 'rd0yrmbbfhypuj8dyorhs'