Google Tag Manager

JavaScript URL: https://www.googletagmanager.com/gtm.js?id=GTM

Extract JSON object

sed -e '/^var data = {$/,/^};$/!d' | sed -e '1s/^var data = //; $s/;$//'

JavaScript events on elements with a certain HTML class

jq '."resource"."predicates"[] | select(."function" == "_cn") | ."arg1"'

To be injected HTML snippets

jq '."resource"."tags"[]'