About the JavaScript API

Review these details when designing EdgeWorkers functions. To learn more about the specific HTTP events that can execute an EdgeWorkers script, see EdgeWorkers event model.

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For information about the supported HTTP methods see, Event handler methods.

Use case support matrix
View the event handler and JavaScript method you can use to achieve an EdgeWorkers use case.


Event Handler	Use Cases	Methods
onClientRequest	Redirect Management Traffic Filtering Allow / Deny Static Response Offload	respondWith()
	Header Management	getHeader() setHeader() addHeader() removeHeader()
	Cookie Management	cookies toHeader() get() getAll() names() add() delete() See the note below.
	Delivery Property Flow Control	getVariable() setVariable()
	Conditionally Route Traffic Personalization	route()
	Cache Key Manipulation	excludeQueryString() includeQueryString() includeQueryArgument() includeCookie() includeHeader() includeVariable()
onClientResponse	Redirect Management Immediate HTML responses Refer to the Product limits for information about the supported response size.	respondWith()
onOriginRequest onOriginResponse onClientResponse	Header Management	getHeader() setHeader() addHeader() removeHeader()
	Cookie Management	cookies toHeader() get() getAll() names() add() delete() See the note below.
	Delivery Property Flow Control	getVariable() setVariable()
responseProvider	Response Orchestration	getHeader() getHeaders() getVariable() text() json() arrayBuffer() createResponse() httpRequest() To use the `responseProvider` functions, you need to import the create-response, streams, text-encode-transform, and http-request modules.
responseProvider	Manipulate the response (body, headers)	createResponse()

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Cookie Management methods
To use theCookie Management methods, you need to import the cookies module.