webRequest.ResourceType

This type is a string, which represents the context in which a resource was fetched in a web request.

It's used tofilter the requests you listen to using the webRequest API. For example: you can listen to requests only for images, or only for scripts.

Type

Values of this type are strings. Possible values are:

beacon

Requests sent through theBeacon API.

csp_report

Requests sent to thereport-uri given in theContent-Security-Policy header, when an attempt to violate the policy is detected.

font

Web fonts loaded for a@font-face CSS rule.

image

Resources loaded to be rendered as image, except forimageset on browsers that support that type (see browser compatibility below).

imageset

Images loaded by a<picture> element or given in an<img> element'ssrcset attribute.

json

JSON modules loaded through animport statement.

main_frame

Top-level documents loaded into a tab.

media

Resources loaded by a<video> or<audio> element.

object

Resources loaded by an<object> or<embed> element.

Browsers that don't have a dedicatedobject_subrequest type (see browser compatibility below), also label subsequent requests sent by the plugin asobject.

object_subrequest

Requests sent by plugins.

ping

Requests sent to the URL given in a hyperlink'sping attribute, when the hyperlink is followed.

Browsers that don't have a dedicatedbeacon type (see browser compatibility below), also label requests sent through the Beacon API asping.

script

Code that is loaded to be executed by a<script> element or running in aWorker.

speculative

In a speculative connection, the browser has determined that a request to a URI may be coming soon, so it starts a TCP and/or TLS handshake immediately, so it is ready more quickly when the resource is actually requested. Note that this type of connection does not provide valid tab information, so request details such astabId,frameId,parentFrameId, etc. are inaccurate.

stylesheet