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Check If a String Includes All Strings in JavaScript/Node.js/TypeScript

When working with strings in JavaScript, you may want to check if a given string contains all values from a list of candidates.

JavaScript comes with a String#includes(needle) determining whether the string contains the given needle. You can combine the existing method with array methods to check whether all candidate strings are part of the base string.

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Check If a String Includes All Strings

JavaScript comes with helpful array and string methods that will help you determine whether a base string contains all values from a list of strings. You can use the Array#every in combination with the String#includes method to check if all items from the candidate list are part of the base string:

/**
 * Determine whether the given `str` includes all needles.
 *
 * @returns {Boolean}
 */ 
includesAll(str, ...needles) {  
  return [].concat(...needles).every(needle => {
    return str.includes(needle)
  })
}

const includesAll = includesAll('Hello Marcus, you look good today!', ['look', 'good'])  
// true

const includesAll = includesAll('Hello Marcus, you look good today!', ['look', 'bad'])  
// false

The includesAll method returns true if all items in the candidate list are part of the source string. Otherwise, it returns false.

Use the @supercharge/strings Package

I’m the maintainer of the @supercharge/strings package providing convenient string utilities. Checking if a string contains all needles is one of the available methods:

const Str = require('@supercharge/strings')

const includesAll = Str('Hello Marcus, you look good today!').includesAll('look', 'good')  
// true

const includesAll = Str('Hello Marcus, you look good today!').includesAll('look', 'bad')  
// false

Enjoy!

Mentioned Resources

Marcus Pöhls

Marcus is a fullstack JS developer. He’s passionate about the hapi framework for Node.js and loves to build web apps and APIs. Creator of Futureflix and the “learn hapi” learning path.

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