Send asynchronous requests with Postman’s PM API
Blog post from Postman
The Postman Sandbox is a JavaScript execution environment used for writing pre-request and test scripts in Postman and Newman, featuring the advanced pm.* API for enhanced scripting capabilities. The pm.* API, succeeding the older postman.* API, allows developers to access request and response elements, enforce testing rules, and manage environments and variables more efficiently. A key feature of this API is the pm.sendRequest() function, which enables asynchronous request sending, allowing scripts to execute without blocking subsequent tasks. Asynchronous JavaScript, while single-threaded, can process commands without delay, as demonstrated with functions like setTimeout(), offering the advantage of executing logic in the background for computational tasks or multiple requests. The pm.sendRequest() function takes a request and callback, handling errors and responses, and is applicable in both pre-request and test scripts, enhancing Postman's capability to handle use cases like authentication beyond the app's interface.
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