Allows you to initialize an Editor class when Unity loads, and when your scripts are recompiled.
Static constructors with this attribute are called when scripts in the project are recompiled (also known as a Domain Reload). This happens when Unity first loads your project, but also when Unity detects modifications to scripts (depending on your Auto Refresh preferences), and when you enter Play Mode (depending on your Play Mode configuration).
Asset operations such as asset loading should be avoided in InitializeOnLoad methods. InitializeOnLoad methods are called before asset importing is completed and therefore the asset loading can fail resulting in a null object. To do initialization after a domain reload which requires asset operations use the AssetPostprocessor.OnPostprocessAllAssets callback. This callback supports all asset operations and has a parameter signaling if there was a domain reload.
Additional resources: running editor code on launch.
Did you find this page useful? Please give it a rating:
Thanks for rating this page!
What kind of problem would you like to report?
Thanks for letting us know! This page has been marked for review based on your feedback.
If you have time, you can provide more information to help us fix the problem faster.
Provide more information
You've told us this page needs code samples. If you'd like to help us further, you could provide a code sample, or tell us about what kind of code sample you'd like to see:
You've told us there are code samples on this page which don't work. If you know how to fix it, or have something better we could use instead, please let us know:
You've told us there is information missing from this page. Please tell us more about what's missing:
You've told us there is incorrect information on this page. If you know what we should change to make it correct, please tell us:
You've told us this page has unclear or confusing information. Please tell us more about what you found unclear or confusing, or let us know how we could make it clearer:
You've told us there is a spelling or grammar error on this page. Please tell us what's wrong:
You've told us this page has a problem. Please tell us more about what's wrong:
Thank you for helping to make the Unity documentation better!
Your feedback has been submitted as a ticket for our documentation team to review.
We are not able to reply to every ticket submitted.