How to check if a string contains a character in typescript. This approach returns the found string if it exists in the array, otherwise returns undefined. Checking the position of a substring in a string Occasionally, you might not only want to determine whether a string contains a particular substring, but also where that substring is located within the string. find () method with a boolean condition The Array. find () method with a boolean To check if a string contains only alphabets in TypeScript, you can use a regular expression as in JavaScript. 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 Nov 28, 2018 · 7 i want to know the best way to check if a string contains a subString or part from subString in typeScript ? for example i have a string path : "home/jobs/AddJobs" And i want to check if it's equal or it contains : "home/jobs" how can i do that in Angular 6 typescript ? Aug 1, 2024 · Output: Array contains the string 'banana'. Mar 11, 2025 · This tutorial demonstrates how to check if a string contains a certain text in TypeScript. Example: In this example, we'll use the Array. 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. This method returns a boolean value: true if the substring is found and false otherwise. find () method can be utilized with a boolean condition to check if an array contains a specific string. 0. See full list on spguides. Dec 6, 2023 · In this case, we first convert the `message` string to lowercase, and then check if it includes the "typescript" substring. But it needs to be tuned I believe. If the character is found, 'true' is returned; otherwise, 'false'. I tried with the following regex,script:. Learn effective methods such as includes, indexOf, and regular expressions, complete with code examples and explanations. Approach 5: Using Array. ,<>/\'";:? and return true if the string contains atleast one of those chars. Mar 14, 2017 · Currently I am using Angular 2. Jul 9, 2022 · To have a better type check, what would be a good type definition for these kinds of values. But the idea is how to have an interface/type for the whole string that we know would contain only certain types of characters in a string. We covered the includes() method, indexOf() method, and regular expressions, along with practical examples. Mar 8, 2022 · I am typescript learner and currently using the below logic to find if a string is having specific characters from an array. We use the 'includes' method of the string object to check if the character is present in the string. com Mar 16, 2025 · In this tutorial, we explored various methods to check if a string contains a substring in TypeScript. Jul 12, 2024 · The includes () method in TypeScript, inherited from JavaScript, is used to determine whether a given string contains a specified substring. Aug 31, 2015 · I want to check if a string contains special characters like !@#$%^&*. type Binary = '0' | '1'; wouldn't work, because these would be representing only single characters of the string. rlxlzl ispfkti hvqunx xit jnay wghd ixzfatrk oqdjat rqeoixi farxqo