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Changes between Version 2 and Version 3 of Ticket #21547, comment 2

v2	v3
8	8	Here's the specific scenario: we run multiple a/b tests each of which needs some dynamic parameters passed to a static javascript file. Each of these a/b tests enqueues the static javascript file if it's not already been enqueued.
9	9
10		The current implementation of wp_localize_script simply creates a new JS object each time it's called. A developer (like me in this case) might want to modify the existing JS object instead of creating a new one. It's easy to simply delocalize the script by passing the handle and calling wp_localize_script one more time.
	10	The current implementation of wp_localize_script simply creates a new JS object each time it's called. This often leads to duplicate objects or overwriting existing objects. A developer (like me in this case) might want to modify the existing JS object instead of creating a new one. It's easy to simply delocalize the script by passing the handle and calling wp_localize_script one more time.