CODEWITHSUNDEEP
javascriptajaxxmlhttprequestcontent-type
Francisco Presencia
Francisco Presencia

Reputation: 8858

What is the default Content-Type in XMLHttpRequest?

I have created a javascript library and I am setting manually the Content-Type right now. I would love to know what is the default Content-Type. The XHR documentation for the send() method is confusing at best:

4. If body is null, go to the next step. Otherwise ...

BodyInit

If body is a string, set encoding to UTF-8.

Set request body and Content-Type to the result of extracting body.

Where, the result of extracting body for a text is:

So, which of these types would it be? The body passed to send() is in the default, escaped format of a=b&c=d. Is it a URLSearchParams? or a USVString? or a Blob? There's a description on each one but it's too cryptic for me to understand (I only know that it's probably not a FormData).

Note: please provide some official documentation if possible

Upvotes: 5

Views: 3955

Answers (1)

Knu
Knu

Reputation: 15144

Directly from the horse's mouth, if you are sending a string their last test expects "text/plain;charset=UTF-8" in accordance with the XMLHttpRequest Level 1 specification.

So you will have to refer to the step four of the send method to know exactly what is expected depending on the data.

Upvotes: 3

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