Headers.set()

The set() method of the Headers interface sets a new value for an existing header inside a Headers object, or adds the header if it does not already exist.

The difference between set() and Headers.append is that if the specified header already exists and accepts multiple values, set() overwrites the existing value with the new one, whereas Headers.append appends the new value to the end of the set of values.

Syntax

set(name, value)

Parameters

• name
  • : The name of the HTTP header you want to set to a new value. If the given name is not the name of an HTTP header, this method throws a TypeError.
• value
  • : The new value you want to set.

Return value

None undefined.