Functions - JavaScript Examples

Using functions on the Azion Web Platform allows you to have closer and faster communication with users. By making use of JavaScript, you’re able to effectively perform tasks that have a great impact on people’s lives and business on a daily basis.

This collection gathers ready-to-use JavaScript snippets that show common patterns for functions, from returning a simple response or JSON payload to redirecting traffic, reading cookies, running A/B tests, and applying firewall rules based on GeoIP data. The examples are grouped by where they run: functions that respond to the fetch event in applications, and functions that handle the firewall event for security and request control. To use any of them, copy the code into a function and deploy it on Azion, optionally customizing behavior through args so the same logic can be reused across instances.

Functions - Applications

A/B testing

Extract cookie value

Hello World

Redirect all requests to one URL

Respond with another site

Rest APIs

Return HTML

Return JSON

Using args

Functions - Firewall

Adding a response header

Deny a request based on Geoip

General functions on firewall example