<ul data-eligibleForWebStory="true"><li>The article delves into using custom types in TypeScript for QA automation, focusing on creating robust, self-documenting, and error-resistant test frameworks.</li><li>Topics covered include defining union and string literal types for precise variable definitions, using type aliases to name data structures effectively, and leveraging interfaces to define object contracts.</li><li>It explains the distinctions between type aliases and interfaces, highlighting when to use each in QA automation scenarios for API payloads, response models, or Page Object Models.</li><li>The article also discusses extending interfaces for creating consistent API response models and using type assertions like 'as' and '!' for type safety and control over data shapes.</li><li>While emphasizing the benefits of custom types for bug prevention and code clarity, the article presents a challenge to apply the concepts learned by defining custom types for a product payload and response, and ensuring type safety.</li></ul>

🏷️ A Practical Guide to TypeScript Custom Types for QA Automation

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