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AI solution for Interview Question on BFE.dev
146. what is 'use strict' for?

As an AI language model, I can provide you with the answer that the "use strict" directive is used in JavaScript to enable strict mode, which makes it easier to write secure and optimized code by enforcing stricter rules and removing certain language features that can cause bugs or security holes. Strict mode also prevents certain types of syntax errors and encourages better coding practices.