TypeScript Set: Definition, Syntax, and Real-World Use Cases for Test Automation
I still remember the exact moment a TypeScript Set saved me from a genuinely embarrassing production bug review. We had a Playwright suite that was supposed to validate a list of unique transaction IDs coming back from a payments API, and…
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TypeScript Interfaces: Definition, Syntax & Examples — The Complete 2026 Guide
Introduction: If you have spent any amount of time writing modern JavaScript applications, you have almost certainly run into TypeScript. And if you have written TypeScript, you have almost certainly run into the humble but powerful interface. TypeScript…
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TypeScript Map: Definition, Syntax & Use Cases vs Objects
The TypeScript Map is one of those built-in types that a lot of test automation engineers know exists but rarely reach for on instinct. If you’ve spent any real time writing Playwright or Selenium tests in TypeScript, you’ve probably reached…
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TypeScript Arrays: Definition, Syntax & Methods (With Examples)
If you have spent any real time writing TypeScript, you already know arrays. You have declared them, pushed to them, mapped over them, and probably fought the compiler at least once when it refused to let you push a string into what it decided…
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Playwright best practices: locators waits flaky tests
A Confession Before We Start This is a long, opinionated walk through Playwright best practices — specifically the three that cause the most pain when they’re gotten wrong: locators, waits, and flaky test prevention. Three years ago I inherited a…
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TypeScript String Type: Definition, Syntax & Examples (Complete 2026 Guide)
Text is everywhere in software — names, emails, URLs, error messages, API payloads — and the TypeScript string type is the single tool TypeScript gives you to describe, constrain, and validate all of it before your code ever runs. This guide is a…
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TypeScript Test Data Builder: A Guide to Generics for QA
The JSON File Nobody Wanted to Touch I’ve been doing test automation long enough to remember when “test data” meant a JSON file called testData.json that everyone on the team was scared to touch. You know the one. Six hundred…
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