How to Check if String Contains a word in Javascript?

Hello Guys, Today In this tutorial we will learn How to Check if String Contains a word in Javascript? so let’s start this tutorial without wasting your time.

How to Check if String Contains a word in Javascript?

Method 1: Using includes()

To Check if String Contains a word in Javascript The includes() method returns true if a string contains a specified string or word else it will return false.

Here we have one string How to Check if String Contains a word in Javascript? and we want to check that our string variable contains a Javascript word or not. Then we need to use includes() and pass the string into it that you are looking for.

const string = 'How to Check if String Contains a word in Javascript?';
const substring = 'Javascript';

console.log(string.includes(substring));

Output Will Be.

True

string.includes(substring) will return true if the substring is exist and else it will return false. Nut remember String.includes method is case sensitive.

const string = 'How to Check if String Contains a word in Javascript?';
const substring = 'Javascript';

if (string.includes(substring)) {
  console.log('String containing Javascript word ');
}else{
  console.log('String not containing Javascript word ');
}

Thank you.

Method 2: Using indexOf() method

You can also use the indexOf() method to check if strings contain a substring. Just call indexOf() with a parameter of substring just like this yourString.indexOf(yourSubString).

indexOf() method Will return a positive number if the string contains a substring and the String is not containing a SubString then it will return -1. Just Like this.

const string = 'How to Check if String Contains a word in Javascript?';
const substring = 'Javascript';

const result = string.indexOf(substring);
console.log(result); 

Output Will be.

42

And If String does Not contain SubString then it will return -1.

const string = 'How to Check if String Contains a word in Javascript?';
const substring = 'Javascripttttt';

const result = string.indexOf(substring);
console.log(result); 

if (string.indexOf(substring) !== -1) {
  console.log("Yes String Contain SubString");
}else{
  console.log("No, String Contain SubString");
}

Hope, Now you understand How to Check if String Contains a word in Javascript? Thanks.

Conclusion

It’s all About this error. I hope We Have solved Your error. Comment below Your thoughts and your queries. Also, Comment below which solution worked for you.

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