Javascript:res,end,res.json & res.send

 comapre following method

res.send

 res.json

 res.end

 Answer:

Following table explain difference betweeen 3.

Method       What it does   Content-Type    Ends response?

res.send()  Sends a response and automatically handles common data types    Automatically sets appropriate Content-Type ✅ Yes

res.json()  Sends a JSON response   application/json    ✅ Yes

res.end()   Ends the HTTP response directly Does not automatically set Content-Type ✅ Yes

1. res.send()

    res.send("hello");

    typically results in:

    Content-Type: text/html; charset=utf-8

2. res.json()

res.json({ "using": "json" });

Specifically sends a JSON response and sets:

Content-Type: application/json; charset=utf-8

3. res.end()

res.end("using end");

This directly ends the underlying HTTP response.

It does not provide Express's automatic formatting/content-type behavior like res.send() or res.json().