Typescript filter string contains substring Otherwise it returns false.

Typescript filter string contains substring. In this article, we'll explore how to use the includes method to search for substrings, determine if a string contains a specific word, and tackle common challenges developers face when working with TypeScript strings. Jun 20, 2021 · Can anybody suggest how to check string contains particular word in TypeScript in Angular? I have tried indexOf and includes methods, but throws error like is not a Mar 13, 2024 · How to: In TypeScript, you slice and dice strings with methods like `substring()`, `slice()`, and the ES6 `includes()` for finding text within strings. One common approach to filter strings based on a substring in TypeScript is by using the filter method in combination with the includes function. This blog post will delve into the fundamental concepts, usage methods, common practices Jan 30, 2020 · I am attempting to filter an array of objects using multiple different filters. Performing a Substring Search For substring searches, use the includes method: Mar 14, 2017 · Currently I am using Angular 2. If you target lower versions, indexOf works or you can use the MDN Polyfill. Mar 16, 2025 · In this tutorial, we explored various methods to check if a string contains a substring in TypeScript. 0. Jun 21, 2025 · Learn 5 effective methods to check if a TypeScript array contains a specific value. Includes examples for primitive values, objects, and case-insensitive searches. prototype. The includes() method is case sensitive. What you want is to determine whether any member of A1 is present as a substring in the given member of A2. I am running into an issue, I have a similar array of Strings in JS: var myArray = ["bedroomone", "bedroomonetwo", "bathroom"]; And I would like to retrieve all the elements in the array that cont Jul 15, 2025 · The substring () is an inbuilt function in TypeScript that returns the subset of a String object. I have an array as follows: var channelArray: Array<string> = ['one', 'two', 'three']; How can I check in TypeScript whether the channelArray contains a str Jul 23, 2025 · In TypeScript, the filtering of keys of type string [] can be done by iterating over the data object, and applying the condition to the string if the key is a string. Jun 22, 2025 · In this blog post, we will explore different ways to check if a TypeScript string contains a substring, covering fundamental concepts, usage methods, common practices, and best practices. Description The includes() method returns true if a string contains a specified string. includes is available in ECMAScript 2015 and newer. Otherwise it returns false. Understanding how to effectively use the `string contains` functionality can significantly enhance your ability to handle text data in your TypeScript projects. . substring(indexA, [indexB]) Parameter: This method accepts two parameters as mentioned above and described below: indexA When working with TypeScript filters, you might need to check if a string field contains a specific substring as part of your query conditions. This currently works for an exact match but doesn't work for filtering using a substring. Jul 12, 2024 · The includes () method in TypeScript, inherited from JavaScript, is used to determine whether a given string contains a specified substring. Mar 11, 2025 · One of the most straightforward ways to check if a string contains a certain substring in TypeScript is by using the includes method. It returns the portion of the string between these indices. This method returns a boolean value: true if the substring is found and false otherwise. This method returns a boolean value indicating whether the substring is found within the string. Using filter Method with includes Function One common approach to filter strings based on a substring in TypeScript is by using the filter method in combination with the includes function. We covered the includes() method, indexOf() method, and regular expressions, along with practical examples. It takes two parameters: indexA (starting index) and optional indexB (ending index, non-inclusive). Jun 15, 2025 · In TypeScript, string manipulation is a common task, and checking if a string contains a certain substring is a frequently encountered operation. Nov 28, 2018 · string. The below methods can be used to filter the keys of type string []. If the condition is satisfied, then an array of output results is created which consists of filtered keys of type string []. includes is functionally the same as indexOf but naturally returns a boolean value, so you don't need to write the > -1 condition. Dec 27, 2019 · The array method is used to find the index of an exact match, whereas the string method can be used to find the location of a substring. This method allows you to iterate over an array of strings and selectively filter out the ones that contain the specified substring. Syntax string. uxnr dqei ikalzsl xrmabo cylmr puvrt piwl remq qieic zzh