But this is a wonderful chance to learn JavaScript at the same. In case you found what you were looking for in the above answers, feel free to stop reading right here. This is a comprehensive guide to checking if a string has a substring in JavaScript. Using the match() method: This method searches the string for a match against a regular expression, and returns an array containing the matched substrings, or null if no match is found. Using the search() method: This method is similar to indexOf(), but it supports regular expressions, allowing for more advanced substring matching. This method returns a boolean value indicating whether the string contains the substring or not. This method returns the index of the first occurrence of the substring in the string, or -1 if the substring is not found.įor example, let’s check if “word” exists in “Hello world!”: var str = 'Hello world!' Here’s a short summary of the most notable ones. Also, it has got the flexibility to identify the starting position of the search.There are several ways to check if a JavaScript string contains a substring. If the word or substring is present in the given string, the includes() method returns true otherwise, it returns false. In this case, we will use the includes() method which determines whether a string contains the specified word or a substring. How to find if a word or a substring is present in the given string.

How to find the single or multiple paragraphs which have the required word or string.

How to find the number of occurrences of a particular word or a string in a given string or paragraph.

How to find a string and replace it with some other string.

How to find a position of a particular word or a string in the given string.

How to find if a word or a substring is present in the given string.

We have a couple of scenarios which we are going to look into to achieve it. Sometimes, we come across a requirement where we need to find the substrings in a paragraph. We will achieve this by using both, JavaScript and jQuery. In this article, we will learn how to search and locate the words or substrings in the paragraphs or large strings.

Javascript if string contains