Recently, one of my team members asked about replacing all occurrences of a substring in a string in TypeScript. I suggested a few methods. In this tutorial, I will explain how to replace all occurrences of a substring within a string using TypeScript. Let me show you different methods with examples. Replace All Occurrences of … Read more >>
To check if a string is empty in TypeScript, compare it with an empty string: str === “” (or str.length === 0). If the value can also be null or undefined, use str == null || str === “”, and add trim() when a string of spaces should count as empty. This guide covers each … Read more >>
In this tutorial, I will explain how to check if a string is part of an enum in TypeScript. If you’ve ever worked with enums in TypeScript, you know they are a powerful way to define a set of named constants. However, checking if a string belongs to an enum can be a bit tricky. … Read more >>
In this tutorial, I will explain how to split a string by comma in TypeScript. If you’re a developer working with TypeScript, you might often need to handle strings that contain lists of items separated by commas. You need to know how to split a string by commas in cases such as processing CSV data, … Read more >>
In this tutorial, I will explain how to convert a boolean to a string in TypeScript and show you various methods with examples. Convert Boolean to String in TypeScript Boolean values (true or false) are often used for conditional logic in TypeScript. However, there are scenarios where you need to convert these boolean values into … Read more >>
I recently got a particular requirement from one of the clients. The client wanted to convert a date to a string format DD/MM/YYYY in TypeScript. In this tutorial, I will explain how to convert a date to a string in the DD/MM/YYYY format using TypeScript with some examples. Different regions use different date formats. For … Read more >>
In this tutorial, I will explain how to check if a string is a number in TypeScript using various methods with examples. As a TypeScript developer, you may often encounter situations where you need to validate user input or process data that could be in various formats. For example, when dealing with forms that collect … Read more >>
As a developer working on a project for a US-based company, I recently faced an issue where I needed to display dates in a specific format on the user interface. After researching, I found several effective ways to do this. In this tutorial, I will explain how to convert a date to a string in … Read more >>
To convert a string to a date in TypeScript, pass an ISO 8601 string to new Date(), such as new Date(“2026-10-08T14:30:00”). Then check the result, because a bad string gives an Invalid Date instead of an error, and a date-only string is read as UTC: Time zones change the answers here, so every run used … Read more >>
Error TS2550 “Property ‘includes’ does not exist on type ‘string’” means your lib setting is older than ES2015, so TypeScript doesn’t know String.prototype.includes exists. Fix it in tsconfig.json by setting lib (or target) to es2015 or later, such as: These errors come straight from TypeScript 7.0.2 and Node.js v22.22.2. A few of the messages changed … Read more >>