For example, to register an HTTP trigger responding to a GET request, you can call app.http() or app.get() which was modeled after other Node.js frameworks like Express.js that also support app.get(). The V4 model uses an app object as the entry point for registering functions instead of function.json files. For example, you can have multiple related triggers in one file or have triggers in separate files that are grouped in one directory.įurthermore, you no longer need to keep a function.json file for each trigger you have in the V4 model as bindings are configured in code! See the HTTP example in the next section and the Durable Functions example in the “More Examples” section. The V4 model removes the strict directory structure and gives users the flexibility to organize triggers in ways that makes sense to their Function app. And if you’re a Durable Functions user, having your orchestration, activity, and client functions in different directories decreases code readability, because you have to switch between directories to look at the components of one logical unit. This strict structure can make it hard to manage if an app has many triggers. The existing V3 model requires that each trigger be in its own directory, with its own function.json file. ![]() In this section, we highlight several key improvements made in the V4 programming model. ![]() The experience we ship today is a culmination of feedback we received from JavaScript and TypeScript developers through GitHub, surveys, and user studies, as well as suggestions from internal Node.js experts working closely with customers. During that time, we were working on a similar effort for Node.js. If you follow news from Functions closely or happen to use Python as well, you may have heard about the release of the new programming model for Python last fall. We’re excited to announce that version 4 of the Node.js programming model is currently in preview! This programming model is part of Azure Function’s larger effort to provide a more flexible and intuitive experience for all supported languages.
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