Will AI replace Underscore.js developers?

No, AI will not replace developers who use Underscore.js. AI can automate repetitive tasks involved in coding: the generation of code snippets, developers are still very much needed to frame application logic, optimize code, and handle particular needs for the project. Underscore.js developers apply themselves to adapting and integrating utility functions within unique application contexts, something no AI alone currently can do.
While AI tools may lighten some work by having built-in functions or even suggesting code, it is in understanding the goals of the projects, debugging, and coming up with customized solutions that require a human developer. Rather than replacing developers who use Underscore.js, AI will more likely augment developers and enable them to do their jobs even faster and efficiently.