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How to store javascript after modifications

Posted by: admin August 19, 2018 Leave a comment

Questions:

Javascript a async language but on a lot of sites I see people write javascript code in a specific order.
The picture below gives an example:
Example of my text

When I use this kind of code I am always afraid that the setItem is performed before the modification/update is done.

How do I know if this code run as intended, and if this code is wrong what is the right way to fix those situations?

Answers: