includes < String < JavaScript

The includes() of a String performs a case-sensitive search to determine whether a given string may be found within the string and returning true or false.

    
    const sentence = 'The quick brown fox jumps over the lazy dog.';

    const word = 'fox';

    const sentenceIncludesFox = sentence.includes(word);
    console.log(sentenceIncludesFox);
    // true