Would an experienced Java developer that has never touched JavaScript before know how to use JavaScript well enough to use it in a professional application without having to learn/revise a lot of things?
Would an experienced JavaScript developer that has never touched Java before know how to use Java well enough to use it in a professional application without having to learn/revise a lot of things?
No and No - They are like car and carpet. Unlike something like C and C++ or JavaScript and TypeScript that you can easily adapt to in a relatively small amount of time, Java and JavaScript serve completely different use cases and require significantly different skillsets.
Would an experienced Java developer that has never touched JavaScript before know how to use JavaScript well enough to use it in a professional application without having to learn/revise a lot of things?
Would an experienced JavaScript developer that has never touched Java before know how to use Java well enough to use it in a professional application without having to learn/revise a lot of things?
No and No - They are like car and carpet. Unlike something like C and C++ or JavaScript and TypeScript that you can easily adapt to in a relatively small amount of time, Java and JavaScript serve completely different use cases and require significantly different skillsets.