API Network requests

module up.network

Unpoly ships with an optimized HTTP client for fast and effective communication with your server-side app.

While you can use the browser's native fetch() function, Unpoly's up.request() has a number of convenience features:

• Requests may be cached to reuse responses and enable preloading.
• Requests send additional HTTP headers that the server may use to optimize its response. For example, when updating a fragment, the fragment's selector is automatically sent as an X-Up-Target header. The server may choose to only render the targeted fragment.
• Useful events like up:request:loaded or up:request:late are emitted throughout the request/response lifecycle.
• When too many requests are sent concurrently, excessive requests are queued. This prevents exhausting the user's bandwidth and limits race conditions in end-to-end tests.
• A very concise API requiring zero boilerplate code.