Best way to check if a string contains a specific word or substring in JavaScript

In this article, we will discuss the best way to check if a string contains a specific word or substring in JavaScript. We will also discuss the different ways to check if a string contains a specific word or substring in JavaScript.

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Includes

In JavaScript, we can use the includes() method to check if a string contains a specific word or substring. The includes() method returns true if the string contains the specified substring, otherwise it returns false.

const str = 'The quick brown fox jumps over the lazy dog.';
console.log(str.includes('fox'));
// expected output: true

indexOf

We can also use the indexOf() method to check if a string contains a specific word or substring. The indexOf() method returns the index of the first occurrence of a specified value in a string. If the value is not found, it returns -1.

const str = 'The quick brown fox jumps over the lazy dog.';
console.log(str.indexOf('fox'));
// expected output: 16

match

We can also use the match() method to check if a string contains a specific word or substring. The match() method searches a string for a match against a regular expression, and returns the matches, as an Array object.

const str = 'The quick brown fox jumps over the lazy dog.';
console.log(str.match(/fox/));
// expected output: ["fox"]

search

We can also use the search() method to check if a string contains a specific word or substring. The search() method searches a string for a specified value, or regular expression, and returns the position of the match.

const str = 'The quick brown fox jumps over the lazy dog.';
console.log(str.search(/fox/));
// expected output: 16

Conclusion

In this article, we have discussed the best way to check if a string contains a specific word or substring in JavaScript. We have also discussed the different ways to check if a string contains a specific word or substring in JavaScript. We hope you have found this article helpful. If you have any questions, please feel free to ask them in the comments section below.