Search for a way to add dynamic JS to before the body tag

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For example: Full.php

Sometimes i need in this page:
lightbox.js
scrollspy.js
tooltip.js

And sometimes i dont need any JS.

Their is some way to add before the end of body tag <script src=.... code? (I dont want to create custom att for this). Like the idea of "HEADER EXTRA CONTENT"

I dont talk about view.js for a blocks.

siton