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arrive.js provides events to watch for DOM elements creation and removal. It makes use of Mutation Observers internally.
This script should not be not be installed directly. It is a library for other scripts to include with the meta directive // @require https://update.greasyfork.org/scripts/519092/1784616/arrivejs%20%28Latest%29.js
How to Install scripts? (Click here)
This library will always be updated to the latest version.
You can compare this Greasyfork library code with the latest version on https://www.jsdelivr.com/package/npm/arrive and see that all the code is the exact same!
To always have the latest version, use
// @require https://update.greasyfork.org/scripts/519092/arrivejs%20%28Latest%29.js