const str = 'To be, or not to be, that is the question.' console.log(str.includes('To be')) // true console.log(str.includes('question')) // true console.log(str.includes('nonexistent')) // false console.log(str.includes('To be', 1)) // false console.log(str.includes('TO BE')) // false console.log(str.includes('')) // true
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