merge-headers

> Easily merge HTTP headers

merge-headers is a utility function that merges all your headers (plain objects, Headers instances or in Arrays format) and gives you the possibility to remove specific headers without too much headache.

Usage

``js
import mergeHeaders from 'merge-headers';

const oldHeaders = new Headers({
'Content-Type': 'text/xml',
'Authorization': 'basic'
});

// Remove Authorization header without altering oldHeaders
const newHeaders = mergeHeaders(oldHeaders, {
'Authorization': undefined
});

console.log(newHeaders.has('Authorization'));
// => false

// Or just merge two headers object
const headers = mergeHeaders(oldHeaders, {
'rainbow': 'rainbow'
});

console.log(headers.has('Autorization'));
// => true

console.log(headers.has('rainbow'));
// => true
`

API

$3

The sources are the same as what the Headers constructor can take.

A TypeError will be thrown if sources contains something else than an object.

Returns a Headers object.

Why?

This is mostly for convenience. It is much easier to do mergeHeaders()` instead of deleting them one by one, thus mutating your headers instance. This way you create a new one with the exact headers you want.

Roadmap

- [x] Tests
- [x] Usage
- [ ] Advanced use cases