Category Archives: TypeScript

TypeScript: Make stricter Required

Posted on February 19, 2024 by Łukasz Grela

When you have a type with optional props, then to make those props required you can use Required like so:

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BrowserPriorityTimers npm module

Posted on March 30, 2023 by Łukasz Grela

I’ve prepared npm package with the BrowserPriorityTimers class. It gives you ability to use timers that will not be throttled by the browser. This maybe useful at times when you want to keep your timers execute without interruption even when … Continue reading →

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TypeScript: Add typing to the lodash entries helper

Posted on March 24, 2023 by Łukasz Grela

This is a followup post to the other one where we’ve added types to the lodash keys helper. This time we will add types to the entries helper, which is an alias to the toPairs helper, where we can also … Continue reading →

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TypeScript: Add typing to the lodash keys helper

Posted on March 23, 2023 by Łukasz Grela

With lodash (Version 4.17.21 at time of writing) and @types/lodash (Version 4.14.191 at time of writing) using the keys helper will lose the type information of the given object.

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TypeScript: custom type guards

Posted on May 9, 2022 by Łukasz Grela

Type guards are tools for type narrowing in TypeScript. You may have used some of those features e.g. typeof, instanceof, in etc. already but I want to describe writing guards for types created by you.

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