Javascript check if string contains exact word. Jul 11, 2025 · The String.


  1. Javascript check if string contains exact word. includes () The most straightforward substring search option is String. It will tell you whether a string "matches" a regex -- i. const { Client, GatewayIntentBits } =… RegExr is an online tool to learn, build, & test Regular Expressions (RegEx / RegExp). This code works well for English words but does not recognize it when the Arabic word is entered. Excel contains two functions designed to check the occurrence of one text string inside another: the SEARCH function and the FIND function. ,Checking if a string contains a substring is one of the most common tasks in any programming language. If the string contain $ in front of a word, I don't want it to check the string for array of words and want to straight way cons Jul 10, 2025 · The match() method of String values retrieves the result of matching this string against a regular expression. includes() returns true. Hi, so I'm trying to create a Unity word game, and one of my needs is to search if an exact word is inside a list. Jul 27, 2022 · Check if a string contains a substring in JavaScript String. prototype. Jun 19, 2021 · My main objective is to check if the string contains array of words. please guide me $blacklistArray = array ('ass','سلام','sample'); $string = this is sample te Aug 2, 2016 · Search for entire word only when using string. We will check whether a cell contains Passed and add a remark in a seocnd Remarks column. The "Up & Going" book includes a section on Equality, with this specific summary of when to Feb 12, 2016 · How can I check that a string does not include the text of another string? Asked 9 years, 8 months ago Modified 4 years, 8 months ago Viewed 213k times Jul 21, 2025 · Regular expressions are patterns used to match character combinations in strings. I thought to ask the question in csharp because it's not really a Unity based question. How do I approach searching for exact match? Regular expression tester with syntax highlighting, explanation, cheat sheet for PHP/PCRE, Python, GO, JavaScript, Java, C#/. includes method to check if a string contains a particular string or text. In this article, we will learn how to effectively use the string contains functionality in Java. All the information I have read online has only given me how to search for letters in a string, so 98787This is correct Mar 12, 2010 · Could you explain what exactly is the difference between "string is in list" and "array includes an object"? Apr 24, 2019 · A practical guide to learning about six different methods to check if a string contains a substring in JavaScript. See full list on freecodecamp. As for permutations, you should decide on a strategy, otherwise, you might face an infinite number of options. location isn't a String, but it has a toString() method. When I send a message containing the word "foo", the bot doesn't reply. Explore examples and best practices for efficient searches. NET, Rust. if it "contains a matching sequence" -- not whether the string is an "exact match". /^hello$/. IsMatch returns true if the text string matches the pattern or false if it doesn't. Jul 23, 2025 · Here are the different ways to find word characters in a string with JavaScript RegExp 1. toString(). If the value is -1 it mean the json array does not contain any object that match the criteria Jun 15, 2023 · As now you know that the source string has a high chance that it contains an English word larger than 3, you can apply dynamic programming, building a tree or change the dictionaryMap and do step 2 recursion if you want to look for an exact word: Aug 8, 2014 · 13 I have string like this: str = "ball, apple, mouse, kindle"; and I have another text to search in this string: search = 'apple'; How to determine using JavaScript if apple exist in comma delimited string? P. By providing a list of possible case variations of our search term, we can use includes() to perform a case insensitive search. e. Basic . The includes() method returns true if the string contains the specified substring, otherwise it returns false. How do I check if a string has exact match? Use re. Anyway, the following code should do the trick for the first two sentences:. includes("franky") or window. These patterns are used with the exec() and test() methods of RegExp, and with the match(), matchAll(), replace(), replaceAll(), search(), and split() methods of String. g. test() function to see if the substring stack is present inside the string delftstack and get true as a result. Note: The text is case sensitive. Apr 12, 2022 · In this tutorial, you will learn how to check if string contains exact substring in javascript. This method is essential for searching text and validating the presence of parts of strings within larger strings, enhancing string handling in various applications. For example, if I apply a search for "o Apr 25, 2025 · check if a string contains a substring in JavaScript using includes, indexOf, and regex. Apr 19, 2015 · I've been trying to get a specific regex working but I can't get it to do what I need. Mar 14, 2019 · So, you can easily check if a string contains a particular substring using the . Nov 23, 2024 · Explore effective methods to determine if a string exists in a list using JavaScript, including ES6 solutions and performance considerations. Jan 14, 2024 · Checking if a string contains a specific word is a common task in JavaScript programming. Jun 17, 2021 · @CherryDT The question is "how to check if the exact words contained in an array in Javascript are present in a string". If a regex is global /g it actually stores state, from the MDN: JavaScript String indexOf () The indexOf() method returns the index (position) of the first occurrence of a string in a string, or it returns -1 if the string is not found: Here's my current code. Here are the different methods to check if the string contains only digits. Jun 28, 2024 · Method 1 – Using the IF Function to Check If a Cell Contains an Exact Text in Excel The Grade column has Passed or Failed in every cell. Since "world" exists in str, . A string is formed by combining multiple characters and a subset of a string is known as substring. Nov 15, 2024 · Introduction The match() method in JavaScript is used to retrieve the results of matching a string against a regular expression. Returns true if the characters exist and false if not. includes(). This is mostly used together with another selector to select the elements containing the text in a group (like in the example above). What is a reasonable way to check for this? How do I check if string contains substring? [duplicate] Asked 15 years, 1 month ago Modified 4 years, 6 months ago Viewed 2. fullmatch () to check whether the whole string matches a regular expression pattern or not. Jan 2, 2009 · For example, let's say we want to check if our URL / string contains " tasty-treats ", so long as it does not also contain " chocolate " anywhere. But I get returned "true" even if word matches part of a bigger word. As the title says , I need to find two specific words in a sentence. from a user input), you have to pay attention to not include special RegExp characters. includes() method to see if one string is found in another. Learn how to search arrays and strings to determine if they contain your item. Suppose let str = "Widget test"; if (~str. contains() method, but there doesn't seem to be one. Using Regular Expression (RegExp) with test () Method The most efficient way to check if a string contains only digits is by using a regular expression with the test () method. The regex should match ROCKET in upper or lower cases, and with or w Jul 11, 2025 · The String. This operation is useful for various applications, such as searching for keywords in user input, filtering data, or validating form inputs. String Contains JavaScript: includes () The JavaScript includes () method, introduced in ES6, determines whether a string contains the characters you have passed into the method. Jul 12, 2025 · JavaScript provides multiple built-in methods to verify if a string contains a substring, each with unique advantages for different scenarios. Mar 3, 2025 · Check If a String Contains a Substring in JavaScript In JavaScript, checking whether a string contains a specific substring is a common task. How do I go about doing this using regex? For example, I need to extract the words Aug 27, 2010 · Update: The You Don't Know JS series by Kyle Simpson is excellent (and free to read online). Use Complete, Contains, BeginsWith, or EndsWith as appropriate for your scenario. Example: In this example, we check if a specific substring is present in the given string. " Your snippet will return true for a string that contains all three words, where OP would want it to return false. contains() method is used to search for a sequence of characters within a string. It doesn't say that it has to be an exact word in the string. I want to check is some text is in a string for instance i have a string str = "car, bycicle, bus" and I have another string str2 = "car" I want to check if str2 is in str. Dec 11, 2020 · The best method to check if a string contains another word, character or substring is to use the PHP strpos () function. Feb 20, 2019 · In JavaScript, we can use the includes() method to check if a string contains a specific word or substring. org Here, we check if str contains the word "world" inside it. How do I check if a string contains a specific word in Java? The contains () method checks whether a string contains a sequence of characters. indexOf ("W Jul 23, 2025 · In order to Check if an array contains a specific string be done in many ways in Javascript. This chapter describes JavaScript regular expressions. Mar 29, 2017 · Using regex in javascript, how to check for the condition when duplicate words are present in a string? The words could be located any where in the string: Given: "but boys run fast boys are stron Feb 5, 2025 · A comprehensive guide to the JavaScript String indexOf() method, explaining how to find the index of a substring within a string. In JavaScript, you can use the . includes Feb 15, 2011 · What is the regex for simply checking if a string contains a certain word (e. Apr 7, 2011 · Pretty straight forward. The series goes into the commonly misunderstood areas of the language and explains the "bad parts" that Crockford suggests you avoid. Learn how to use the includes() method in JavaScript to write an if statement that must contain specific text. It provides a brief overview of each May 3, 2019 · Why do you want regex in this case? Checking for (exact) equality should really be done without regex. If you need to check if a string contains a substring, but you don't care about the case, you'll need to roll up your own solution. Mar 4, 2024 · # Check if a Regex matches an Entire String Use the test() method to check if a regular expression matches an entire string, e. It returns true if the substring is found within the string, and false otherwise. Internally, :contains() has to loop over all the elements and perform a regex comparison for "John". includes(), introduced in ES6. By understanding them you can make proper use of them and avoid the pitfalls. \s matches any whitespace character (equivalent to [\r\n\t\f\v ]) word matches the characters word literally (case sensitive) $ asserts position at the end of the string, or before the line terminator right at the end of the string (if any) 3rd Alternative Jul 10, 2025 · The includes() method of String values performs a case-sensitive search to determine whether a given string may be found within this string, returning true or false as appropriate. location. Conclusion We can match an exact string with JavaScript by using the JavaScript string's match method with a regex pattern that has the delimiters for the start and end of the string with the exact word in between those. Nov 23, 2024 · Explore effective methods to determine if a URL contains a specific string in JavaScript, including practical examples. test(str). Dec 27, 2023 · The includes() method in JavaScript checks if the given string contains the specified substring. Oct 12, 2020 · You can do a simple regex for a sentence. It's a simple method that returns a boolean value depending on whether the string contains the substring or not. The includes() method is case sensitive. In Javascript, we have several other modern approaches which help in finding a specific string in an array to iterate the array some more methods include using the indexOf () method and includes ()method and with the help Nov 24, 2009 · Usually I would expect a String. In javascript, I need to check if a string contains any substrings held in an array. Feb 27, 2020 · I want to check if a string (let entry) contains exact match with let expect: Jan 2, 2022 · In this tutorial, you will learn how to check if string contains exact word in javascript. test(haystack) Aug 9, 2013 · 2 I have an array that contains string. includes("franky") From the old Mozilla docs: Location objects have a toString method returning the current URL. location). Jun 18, 2016 · OP said, "So only if one, and only one of the conditions is true. But the beauty of regex lies in the fact that we can do case insensitive searches, which is not possible with built-in JavaScript methods, and we can even look for patterns like a numeric substring of fixed length without even knowing what it is. The match() method returns null if no match is found. But using match, indexOf or includes are not working properly. 0m times Feb 13, 2024 · Using indexOf (): You can use the indexOf() method to check if a string contains a specific substring. location as if it were a string Definition and Usage The :contains () selector selects elements containing the specified string. There are several ways to check if a string contains a substring in JavaScript, depending on your needs and preferences, such as: To find the first index of a substring, use indexOf (). const regexp = /^abc$/; // Where 'abc' is the exact string you want to match Match empty string Use the ^ and $ anchors to match the start and end of the string, respectively. It returns -1 if not found. This means that you can work with window. Jan 7, 2021 · In this tutorial, we’re going to discuss methods you can use to check if a JavaScript string contains another string using these three approaches. Right now, using hashset. S: str can be with or without spaces between comma and next item. Aug 10, 2021 · We use the spread operator to convert the match object to an array since the match object is an iterable object. The :contains() selector in jQuery allows selection of elements containing specific text, enhancing DOM manipulation and content filtering capabilities. In this article, you will learn about different ways JavaScript String indexOf () The indexOf() method returns the index (position) of the first occurrence of a string in a string, or it returns -1 if the string is not found: Nov 23, 2024 · How to Check if String Contains Substring in JavaScript When building a dynamic web application, you may encounter scenarios where you need to verify if a string contains a particular substring. The caret ^ and dollar sign $ match the beginning and end of the string. Feb 2, 2024 · Here we use the . indexOf() method to check if a string contains a substring in JavaScript. This is for a build script but has Nov 14, 2024 · Introduction The includes() method in JavaScript provides a straightforward approach to verify if a string contains a specific substring. for example, does space between letters count, and if so, does two words without space count as well, and so on. Use the following formula in E5 to check whether the cell D5 contains the specific text Passed. This comprehensive guide covers all methods with practical examples and performance considerations for 2024-2025 development standards. If you intend to perform a case insensitive search, you can use the PHP stripos () function instead. For example, if I'm Mar 30, 2023 · Answer by Reagan Nixon Pre-ES6, the common way to check if a string contains a substring was to use indexOf, which is a string method that return -1 if the string does not contain the substring. Jul 23, 2025 · The includes () method is the most simple and modern way to check if a string contains a specific substring. 'Test')? I've done some googling but can't get a straight example of such a regex. This method is very handy when you need to extract specific parts of strings based on patterns, or check if a string contains a certain substring satisfying a pattern. Jun 9, 2011 · What is the regular expression (in JavaScript if it matters) to only match if the text is an exact match? That is, there should be no extra characters at other end of the string. Jul 11, 2025 · A string with only digits means it consists solely of numeric characters (0-9) and contains no other characters or symbols. includes() method. Sep 9, 2019 · Learn how to use String. 1. Similarly, the . Key things to note: According to JavaScript performance benchmarks, . contains(text, Oct 13, 2017 · findIndex can also be used to find if it contains the value. Jan 9, 2021 · The JavaScript 👨‍💻 includes method finds 🔍 the target in an Array or String. Jan 21, 2022 · In javascript the includes () method can be used to determines whether a string contains particular word (or characters at specified position). Jun 20, 2024 · Using regular expressions using operator contains () method Check Python Substring in String using the If-Else In Python, you can check python substring in string is present using an if-else statement. Contains kind of works, but the issue is I want exact word matches Nov 9, 2022 · Exact string match Use the ^ and $ anchors to match the start and end of the string, respectively. You can also assign a string to window. Feb 11, 2019 · I want to search only the specific word in my string using javascript. ES6 contains inbuilt method (includes) in String's prototype, which can be used to check if string contains another string or not. If the substring is found, it returns the index of the character that starts the string. Add the string you want to match in-between the two anchors. You have to escape them, for example with the function provided in the MDN (scroll down a bit): Description The match() method matches a string against a regular expression ** The match() method returns an array with the matches. May 4, 2016 · Is there a way in lodash to check if a strings contains one of the values from an array? For example: var text = 'this is some sample text'; var values = ['sample', 'anything']; _. includes () method can be used to check if a DIV element (or any element) contains a particular text or word in it. Regular expression tester with syntax highlighting, explanation, cheat sheet for PHP/PCRE, Python, GO, JavaScript, Java, C#/. I'm interested in finding if a string contains a word. I am using hashset to hold the list of 270,000 words, so performance needs to be accounted for also. But they can be in any order and any casing. Its case sensitive. 3m times If you want to have a variable word (e. Otherwise it returns false. To do this with a dynamic string rather than a hardcoded one (assuming that the string will not contain any regexp control characters): new RegExp('^' + needle). In this article, we explored three different methods to accomplish this task: using the includes() method, regular expressions, and the indexOf() method. I want to check the blacklist in the posts. Jun 13, 2023 · You can use the following RegEx pattern to determine whether the exact word is specified in the text file or not. A word is formed with help of multiple letters and a sentence is a combination of multiple words. I need to find a way to figure out a way to find the exact word in a string. is there any solution how to check strings(ex:Google) and add Link react router into specific word(ex:Google)? example like this photo before after this is my very simple code import React, { Either modify the pattern beforehand so that it only matches the entire string: var r = /^a$/ or check afterward whether the pattern matched the whole string: function matchExact(r, str) { var match = str. So for example my array contains the words {foofy, foofa, foo, awtsy}, foofy, foofa and foo will be displayed since they all contains the word foo. This regex pattern would work (works in JavaScript too) Just in case anyone else comes across this, it's actually less efficient to add the :contains() check. In JavaScript, regular expressions are also objects. includes () in Javascript Asked 9 years, 2 months ago Modified 9 years, 2 months ago Viewed 3k times In this article, we would like to show you how to check if a string contains a word (case insensitive) in JavaScript. But how does it work exactly? In this article, I will walk you through a few code examples of the JavaScript string method called . Jun 20, 2025 · IsMatch matches the entire text string (Complete MatchOption), while Match and MatchAll search for a match anywhere in the text string (Contains MatchOption). Aug 4, 2019 · 2 I am trying to search for exact string/word within a string/sentence with includes () and I want it to return true if it does. ,The most Nov 5, 2021 · In JavaScript you can use the . This method Feb 12, 2025 · Explanation In this example, the goal is to test a value in a cell to see if it contains a specific substring. The string can be contained directly in the element as text, or in a child element. var js_userBoxName = new Array(); I want to search the elements of the array if a string has the word "foo" it should displayed. To check if a Javascript String Contains a substring or not, we can use 7 different Javascript methods as listed in below table. If the method returns a value greater than or equal to 0, it means the substring is present in the string. May 21, 2025 · Hey there, fellow JavaScript enthusiast! Have you ever found yourself digging through documentation just to check if a string contains another string? I‘ve been there too, and that‘s why I want to share everything I know about the includes() method – one of the most useful yet often underappreciated tools in JavaScript‘s string manipulation arsenal. Description The includes() method returns true if a string contains a specified string. includes() can be upto 3x faster for substring searching than other options. Jan 15, 2024 · In this blog post, you have learned how to check if a string contains a substring in JavaScript, using various methods and techniques. So you can do it like this: (''+window. May 20, 2022 · Let’s say you have a string and you want to check if it contains a specific word, character or substring. May 25, 2024 · Can I check if a JavaScript string contains a substring, regardless of case? As with most languages, JavaScript's substring matching is case-sensitive by default. Basically, I want it to look for ROCKET. One of the most common methods to do this is by using the traditional for loop. The if-else statement allows you to conditionally execute different blocks of code based on whether the condition is true or false. How to find if an array contains a specific string in JavaScript/jQuery? Asked 14 years, 4 months ago Modified 1 year ago Viewed 1. Using \w to Find Word Characters The \w metacharacter in regular expressions matches any word character, which includes: A to Z (uppercase letters) a to z (lowercase letters) 0 to 9 (digits) Underscore (_) You can use \w to find word characters in a string, either individually or as part of a larger search. match(r); return match && str === match[0]; } window. z4s aij5 qwb 0zb t82k 57y qtf1ik zi37 6lh zgyvo