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Does json add any overhead compared to returning raw html?

I have an ajax call that currently returns the raw html that I am inserting into the page.

Now my problem is that in some situations I need to return the count value along with the raw html, and if this count is> 10, I need to run another jquery operation to make something visible.

A better approach here would be to return json then correctly? Therefore, I can do:

jsonReturned.counter
jsonReturned.html

Do you agree?

Also, out of curiosity more than anything, is json a more expensive quality? This is a simple object with properties, but just asking.

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The only way to find out if they are important to your application is to measure them. None of them are clearly large, and none of them is larger than O (n).

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